When a storm came through mid-project, this homeowner reached out for some advice. 

A homeowner in Wisconsin, Rebecca, recently reached out to the AskARoofer experts for some advice. This was their message: 

A roofer put ice/water barrier, underlayment and a tarp on the roof yesterday. We had heavy winds and rains overnight and the tarp came off. What are next steps? Roofer wants to shingle this morning. Still raining a bit. 

Below is what one of our roofing experts, John Kenney from Cotney Consulting Group, had to say in response to Rebecca's question:

I would not rush into shingling just because the tarp came off. The first step is to inspect the entire dry-in before anything gets covered. The roofer should check the ice-and-water barrier and underlayment for tears, lifted edges, wrinkles, loss of adhesion or areas where wind-driven rain may have gotten underneath. They should also verify whether the roof deck became wet.

If the underlayment is intact and the deck is dry, the project may be able to proceed once conditions are suitable. If water got beneath the underlayment, the deck should be allowed to dry and any damaged materials should be repaired or replaced before shingles are installed. The concern is trapping moisture within the roof assembly.

I would also be cautious about installing shingles while it is still actively raining or while the roof surface is wet. In addition to workmanship concerns, wet roofing surfaces create a serious safety issue for the crew.

My recommendation is to have the roofer inspect and document the condition of the roof this morning, repair any damage to the dry-in, and wait for an appropriate weather window if necessary. I would also want the installation to follow the underlayment and shingle manufacturers’ requirements for acceptable installation conditions.

The tarp coming off does not automatically mean the roof has been compromised, but it does mean the dry-in should be checked carefully before the new roof is covered.

Continue the conversation in our Forum.

By Jesse Sanchez. 

A little preparation before roofing work begins can help protect your property, reduce delays and create a safer work area. 

Summer’s dry weather can provide an opportunity for homeowners to move forward with roof replacement projects. Fields Roof Service recommends preparing the property before crews arrive to help protect belongings, reduce potential delays and give workers the space they need to complete the job safely and efficiently. 

Homeowners can start by clearing the areas around the house. Delicate flower beds and shrubs may be covered with tarps to help protect them from dust and old roofing materials. Patio furniture, grills and potted plants should also be moved away from the home so workers have clear access to the roof. 

Driveways are another important consideration. Roofing crews may need room for delivery trucks, dumpsters and other equipment, so moving personal vehicles to the street can help prevent damage from falling debris while keeping the work zone open. Preparation inside the home can also make a difference. Roofing work creates vibration, so loose pictures, mirrors and delicate shelves should be removed before construction begins. 

Noise is another factor families may want to plan for. Air compressors, trucks and hammers can be disruptive, particularly for young children and pets. Keeping pets indoors or arranging another safe location for them can help prevent them from entering active work areas. 

Communication with the roofing team is equally important. Before work begins, homeowners can ask the project manager about the daily schedule, access to yard gates and the availability of electrical outlets. Addressing those details ahead of time can help prevent delays. 

After installation, cleanup typically includes removing roofing debris from the property. Workers may also use a rolling magnet to collect nails, staples and other metal pieces that could remain in the lawn or driveway. 

Taking time to prepare the property allows the roofing crew to concentrate on the installation while helping homeowners protect their belongings throughout the project. 

Learn more about preparing for a residential roofing project with Fields Roof Service!

By The Coffee Shops®.

As the summer ends in the Northern Hemisphere, it’s important to be aware of what the warmer temperatures and longer days might have done to your roof.

Have you noticed rising cooling costs, uneven indoor temperatures, musty odors, damp insulation or visible shingle wear as summer comes to a close? These can all be a result of your roof spending a long summer in the sun and heat. In the summer, heat tends to gather in the attic or crawlspaces of homes buildings. That built-up heat can cause a variety of issues. For one, trapped heat can radiate into living areas, place additional strain on air conditioning systems and raise your bills.

It can also damage your roofing materials. For example, excessive attic heat may bake asphalt shingles from below, contributing to curling, cracking and granule loss. Poor airflow combined with temperature swings can place additional stress on roof decking and other components.

With these issues in mind, it’s a good idea to give your roof a bit of a pick-me-up at the end of the summer! Bringing in a professional to inspect your roof is the first step, as they can help you identify what the root issue is.

The team at J&K Roofing performs these types of inspections frequently and recently shared some insights into what they often find:

Homeowners often focus on shingles or insulation, but roof ventilation can also impact how comfortable and efficient a home feels when temperatures climb. Without a well-designed system, heat builds rapidly in the attic and begins to affect everything below it.

Alternatively, a well-designed system keeps a building’s occupants comfortable while also preserving a roof’s structural integrity.

Learn more about the role of ventilation is the health of your roof.

Recently, a homeowner reached out to ask for some help understanding the different quotes they got from roofers.

Deb, a homeowner from California, reached out to our experts with this question: 

Hi, I am having my roof replaced and have dutch gutters. The roofer is recommending to apply a coat of asphalt primer to the galvanized sheet metal then add a GTA torch roll over the inner ply as a final covering. Is that advisable? I have had several quotes but only one mentioned this.

One of our experts, John Kenney from Cotney Consulting, responded to Deb's question, saying: 

Deb, the roofer’s proposed approach is not unusual. A properly designed modified-bitumen system over a built-in or Dutch gutter can be a durable waterproofing method, and asphalt primer over properly prepared galvanized metal is commonly used where the roofing membrane will bond to the metal.

What matters is the complete assembly. The galvanized metal should be sound, clean, dry and properly secured and the modified-bitumen membrane needs to be integrated with the roof above, including the corners, outlets, seams and transitions. Sheet metal moves with temperature changes, so the membrane detail also needs to account for that movement rather than simply covering the metal with another layer.

The GTA product you mentioned is typically a granulated, torch-applied APP modified-bitumen cap sheet. Torch-applied modified bitumen has a long history in the roofing industry, but I would pay particular attention to fire safety in your case because the photo shows significant wood construction around the gutter. NRCA recommends proper fire-resistant backer details and trained torch applicators when torch-applied membranes are used around combustible construction.

There are also other proven modified-bitumen options that may be appropriate depending on the manufacturer and detail, including cold-applied SBS and self-adhered systems. Those can sometimes reduce the need for open-flame work in areas where wood construction makes torch application more difficult.

My recommendation would be to ask the roofer for the exact primer, base or interply and GTA products they intend to use, along with the manufacturer’s approved detail for lining this type of gutter. I would also ask whether they are CERTA-trained or otherwise specifically trained in torch-applied modified-bitumen work and what fire-protection measures they will use around the wood construction.

I would not reject the proposal simply because the other contractors did not recommend the same approach. It may actually be a more complete waterproofing detail. I would just want confirmation that it is being installed as an approved system and that the torch work is being handled safely.

Continue the conversation in our Forum.

By Emma Peterson.

While shingles and membranes often get the spotlight, underlayment serves as a crucial defense against moisture, weather exposure and deck damage.

While many home and building owners might not know what underlayment is, it is one of the hidden heroes of roofing. Underlayment products are placed between a roof deck and roofing material. So, on many residential homes, the underlayment would go on the wooden roof coverboards and then shingles would be installed on top of it.

There are multiple reasons why this layer is a necessary part of the roof assembly, including:

• Durability: by creating another layer on top of the deck, underlayment helps protect the deck both during installation (from damage that comes from having a crew navigating on the roof) and after (from impact damage related to things like hail).
• Water-resistance: additionally, underlayment acts as another layer of water-protection. This is especially important for areas that experience wind-driven rain (which can pull shingles off and expose the underlayment) and areas that struggle with ice dams (where freezing water can back up beneath shingles).
• Energy-efficiency: underlayment can also improve energy-efficiency for roofs in high-heat climates. In this case, you want an underlayment with heat- and UV-resistance ratings.

With all this in mind, making sure your home or building has a strong, reliable underlayment installed on it is key to having a long-lasting roof assembly. And a great option for many home and building owners wanting that long-term performance is TopShield’s StormGear™ products.

TopShield, SRS Distribution’s high-end brand, specifically designed the StormGear line to help roof assemblies withstand and recover from weather-related incidents. Within the line, there are two main types of products sold – synthetic underlayment and a modified base sheet.

Ideal for residential projects, the StormGear synthetic underlayment offers both the UV protection that high-heat climates benefit from as well as the weather and water protection that stormy regions need. Further, it features an anti-skid backside that means roofers can install it more efficiently, carries a Class A Fire classification and is impervious to mold growth.

As for the base sheet, it is an SBS-modified formula perfect for commercial buildings. The modifications to the SBS include an ultraviolet resistant polyolefin film surface and a glass fiber reinforcement. The result? A high-strength and self-adhesive base sheet that provides “an efficient alternative to conventional roofing methods such as torching, hot asphalt mopping and cold applied adhesives.”

Overall, both of these products are prime examples of a quality underlayment that will keep your business or home safe for years to come.

Learn more about the StormGear line.

By The Coffee Shops®. 

Discover what makes a roof a good candidate for restoration and the steps contractors can take to protect it for the future. 

Years ago, when a roof was damaged or needed significant repairs, the typical solution was to tear it off and replace it entirely. Today, advances in roofing repair technology offer building owners another option – Roof restoration. But how do contractors determine whether your roof is eligible for a restoration?  

They’ll start by evaluating the current state of your roof. They will look for things like:  

• Standing or ponding water: This can indicate structural sagging in the roof deck. Soft areas underfoot may be a sign that the insulation is saturated. 
• Splitting membrane: This can be indicative of internal damage as it shows the age of the membrane and is often a spot where water can intrude. 
• Rust, rot or decay: Inspectors will look for this both on top of the roof and in the building as it signals areas with significant damage. 

During this process, they are trying to determine the extent of the damage to the roof. This is because, according to the experts at APOC, “Building codes and standards often state any roof that is more than 20% saturated must be fully torn off and replaced.”  

If this initial inspection goes well and it is determined that your roof is a good candidate for restoration, the next step is preparation. This process will look slightly different for every roof, but the APOC experts say there are four fundamental steps:  

1. Prepare the roof: Remove debris and thoroughly clean the surfaces. 
2. Prime the surfaces: Proper priming helps patches adhere to the roof. 
3. Complete the repairs: Patch the affected areas and make sure the roof is watertight. 
4. Apply a protective coating: Finish the project with a long-lasting coating designed to protect the completed work. 

While the cheaper cost and less disruptive nature of a restoration is attractive, it is important to make sure that your roof is being properly assessed and prepared before jumping straight into a restoration project.  

Learn more about the process.

By DaVinci Roofscapes.

An architect’s guide to specifying composite slate and shake for schools, colleges and universities.

On an educational campus, a roof does more than protect a building. It helps define a historic skyline, connects new construction to an established architectural vocabulary and supports the institution’s long-range stewardship goals.

For architects and design professionals, the specification must reconcile those visual priorities with structural constraints, severe-weather exposure, maintenance demands and practical installation.
 

Composite slate and shake products from DaVinci® Roofscapes bring authentic character together with Class A fire and Class 4 impact ratings, resistance to severe weather and strong winds, low-maintenance performance and a 50-year limited warranty. Universities, colleges and schools across the country have used these products on historic renovations, residence halls, learning centers, laboratories, athletic facilities and highly visible mansard roofs. For the design team, that range of applications offers a way to preserve architectural intent while addressing the practical demands of buildings created to serve generations of students.

Why specify DaVinci for educational buildings?

• Connect design intent to institutional priorities: Specify the look of natural slate or shake alongside performance features that campus decision makers value.
• Protect historic character: Use realistic profiles, textures, edges and color blends to complement traditional architecture and existing roofscapes.
• Respond to structural constraints: Consider lightweight composite construction where the weight of natural slate is a concern.
• Support long-term stewardship: Pair low-maintenance materials with a 50-year limited warranty to strengthen conversations about lifecycle value and capital planning.
• Address regional exposure: Bring Class 4 impact and Class A fire ratings into discussions of hail, fire and severe-weather performance.
• Consider constructability: Pre-coordinated bundles can reduce hand mixing and installation labor, connecting material selection to jobsite efficiency.
• Create campus-wide continuity: A successful first building can establish a repeatable palette and roofing standard for future reroofing projects.

Proof on campus: Design challenges, built solutions

Utah State University: Establishing a consistent historic roofscape

Deteriorating cedar shakes on landmark Quad buildings dating to 1889 and 1918 created a preservation and performance challenge. A consistent DaVinci composite shake style and color was used across the Geology building, Old Main and the Ray B. West building. For architects, the project illustrates how a successful material choice can preserve architectural continuity and become a standard across a historic campus precinct.

“We won’t even consider another roofing product for the Quad area. We’re impressed with how the DaVinci product handles our weather conditions.”

— Quin E. Whitaker, PE, MBA, Utah State University

University of Notre Dame: The slate look without the slate weight

A residential-style learning center could not support traditional slate, yet its roof needed to blend with surrounding campus buildings. DaVinci Multi-Width Slate delivered the desired natural-slate appearance without defaulting to the heavier material. The university also prioritized a long-term product aligned with its sustainability goals. As a further expression of confidence, the university project manager later selected the product for his own home.

“You can’t tell any difference from the natural slate. The roof blends in perfectly with the surrounding buildings that feature real slate.”

— Tony Polotto, LEED AP BD&C, RRC, RRO, University of Notre Dame

Phillips Exeter Academy: Modern performance, old world character

Failing natural slate across a historic New England campus of 147 brick buildings called for a solution that respected the academy’s established character. Inspire® Slate was installed on Wheelwright Dormitory and, years later, on Wetherell Dining Hall, Merrill Dormitory and Langdell Dormitory. Textured surfaces and deckled edges modeled from natural slate provided the historic aesthetic, while lightweight construction, Class 4 hail performance and a Class A fire rating addressed functionality. The design lesson: preservation goals and modern material performance can inform the same specification.

“Using modern technology and materials to retain Old World charm and character is important.”

— Jack Sweeney, Sweeney Brothers Construction, LLC

Georgia Tech: Balancing laboratory protection and historic context

A failing roof over the Daniel Environmental Engineering Laboratory presented unusually high stakes: leakage could create serious contamination and public-risk concerns. Natural slate weight was a concern, but the replacement still needed to complement a historic slate-roofed campus. DaVinci Single-Width Slate in a custom blend of 70% Evergreen and 30% Light Purple addressed the aesthetic requirement, with Class 4 impact resistance and Class A fire performance among the decision drivers. The project shows how color customization, structural considerations and performance priorities can converge in one roofing selection.

“The school had a complex, high standard for this re-roofing project. And, the DaVinci composite slate product fit in every way.”

— Jeremy Dickmann, PRIMM Roofing

Mississippi State University: Constructability supports the specification

The four-story Old Main Academic Center features Slate Gray DaVinci synthetic slate. On its first installation of the product, the Graham Roofing team found it more contractor friendly than other brands it had installed. Pre-coordinated bundles eliminated hand mixing, and the tiles did not require corner bending before installation. For architects and design professionals, these reported handling advantages add a constructability dimension to conversations about material selection, labor and scheduling.

“We saved a tremendous amount of time and labor.”

— Mickey Gilmer, Graham Roofing

More campus applications, more design possibilities

• William Penn Charter School, Pennsylvania: DaVinci Single-Width Slate helps a modern athletic and wellness center blend with a 330-plus-year-old campus, connecting contemporary programming with an established architectural setting.
• The College of New Jersey: A roofer recommendation led to DaVinci Slate installations on a residence hall and an aquatic center, demonstrating its use across different campus building types.
• Brownell Talbot, Nebraska: DaVinci Multi-Width Slate answered hail exposure, warranty and color-matching needs across five campus buildings.
• University of Minnesota: DaVinci Multi-Width Slate was selected for Pioneer Hall for its authentic appearance, value, low maintenance and impact and fire resistance.
• Thomas Edison State College, New Jersey: DaVinci Slate delivered a thick traditional profile, reflectance value and Castle Gray color coordination for a new nursing education center.
• Washburn University, Kansas: DaVinci synthetic slate has been used on the alumni center, field house and art museum, demonstrating the potential for a consistent material approach across ongoing reroofing work.
• Primrose School of Blue Valley, Kansas: A repeat owner chose DaVinci Single-Width Slate after a similar roof at another school performed well for six years.

Mansard Roofs: When the roof becomes the campus façade

On mansard applications, roofing becomes one of a building’s most visible architectural surfaces. Profile, texture and color are therefore central to the façade composition—not simply the roof specification. Eight residence-tower buildings at the State University of New York use DaVinci Multi-Width Slate in a European blend across nearly four stories of steep mansard roofing. At Butler Community College in Kansas, 16 structures received DaVinci slate after severe hail damaged 95% of campus roofing. Together, these examples place visual prominence and campus-scale durability at the center of material selection.

“We chose the synthetic slate DaVinci tiles because they’re practically maintenance free. These durable composite tiles won’t crack or break, even if hit with a baseball bat or hammer.”

— Lynn L. Umholtz, Butler Community College

Translate product features into specification value

An architect specification playbook for the next campus project

1. Start with the building and its context: Identify historic character, structural limits, roof visibility and the consequences of failure. Establish what the roof must contribute to both the building and the surrounding campus.
2. Connect local risks to tested performance: Discuss hail, fire, wind and weather conditions in terms the facilities team can use, linking performance priorities to material evaluation.
3. Develop visual options early: Compare profiles, widths and color blends against surrounding campus roofs and masonry so the selected product supports the project’s architectural vision.
4. Include constructability in the conversation: Work with the roofing team to quantify how product handling and pre-coordinated bundles may affect installation labor and scheduling.
5. Design for the campus portfolio — not just one roof: Consider how a successful installation can establish a repeatable roofing standard across multiple buildings while maintaining architectural continuity.
6. Document long-term value: Pair low-maintenance performance with the 50-year limited warranty and the institution’s capital plan to support a lifecycle-focused material discussion.

Specify for the next building — and the next generation

For educational buildings, the strongest roofing specifications connect authentic character, tested performance and long-term value. Specifying DaVinci composite slate and shake helps schools, colleges and universities preserve the architecture they value while addressing the demands of campus stewardship.

Start your composite slate and shake roofing specifications on campus and watch them lead to the thoughtful foundation for the next building, the next phase and a coherent campus-wide standard in the future.

By Kate Smith, Sensational Color.

Check out some of timeless colors that DaVinci's composite roofing comes in.

Roofs and exterior walls don't usually get replaced on the same timeline. A homeowner might be re-roofing now but repainting or re-siding years from now, in a color that hasn't been chosen yet. In that situation, the composite roof needs to stay compatible with whatever comes next. A few colors are built for exactly that job.

Versatile picks

Charcoal Black and Dark Graphite Gray are the safest, most universally compatible roof colors there are. If a homeowner genuinely doesn't know their future siding color, these two colors remove the guesswork.

Rock Ridge blends dark gray and black to mirror the iron sulfide, graphite and carbon minerals found in real quarried slate, so it reads as a rich, varied neutral rather than a flat single tone.

Timber Black is technically a black, which usually falls into the "too stark" category — but it isn't a flat, solid black. It's built from deep grays blended into charcoal-black, modeled on the way rustic cedar actually darkens with moisture. That layered quality is what keeps it out of the "pure black" trap and closer to a deep neutral that can flex with future wall colors.

Mountain is a rugged mix of grays and browns with natural weathering that works well with tan, brick and stone. Less at home with cool blues or stark white.

Smokey Gray runs cooler than charcoal, with a subtle blue or navy-blue undertone that echoes historic blue-black slate — quarried in Pennsylvania and Virginia and still a familiar sight on Mid-Atlantic historic, commercial and residential buildings. It's a good option for a homeowner who wants something more distinctive than charcoal without leaving the safe, cool-neutral family.

Colors to avoid if the future siding is undecided

Where Aurora and Blonde Cedar fit instead

Not every DaVinci color belongs on a versatility list, and that's by design. Two of the newer colors — Aurora and Blonde Cedar — are crafted for homeowners who already know their palette and want a roof with a specific character.

• Aurora: Cool-toned mottled plums and browns combined with mossy gray-green
• Blonde Cedar: Sun-kissed shades of golden tan, beige and brown

If the siding color is settled, those two are worth a look. If it isn't, Rock Ridge and Timber Black are the newer composite slate and shake colors that actually solve the problem this article is about.

The bottom line

When the future siding color is still an open question, the goal isn't to select the most exciting roof color — it's to choose the one that won't need defending later. Charcoal, Dark Graphite Gray and their close cousins, Rock Ridge and Timber Black — all composite slate and shake roofing tiles — do that job without asking a homeowner to commit to a warm or cool palette before they're ready.

Curious how a versatile composite roofing color would look against different siding options? Use the free Design Tool to "try on" different DaVinci composite slate and shake roofs before deciding.

By Jesse Sanchez. 

Proper underlayment helps protect the roof deck from condensation, friction and water intrusion. 

A metal roof is designed as a complete system and the layers beneath the panels are just as important as the finished surface. According to Mountaintop Metal Roofing, metal roofing should not be installed directly over bare plywood because doing so removes a critical layer of protection between the roof deck and the metal panels. Roofing underlayment, whether felt or synthetic, serves as a moisture barrier over the plywood decking. This is especially important in damp climates such as Washington and Oregon, where changing temperatures can cause condensation to form on the underside of metal panels. Without underlayment, that moisture can come into direct contact with the plywood, potentially
contributing to mold, warping and wood rot. 

Underlayment also helps address the natural movement of metal. As temperatures change, metal panels expand and contract. When panels sit directly against rough plywood, that movement can create friction that wears against the back of the metal. Mountaintop Metal Roofing says a smooth slip sheet can also be installed over the underlayment to help the metal move without damaging the waterproof layer beneath it. 

The underlayment provides another line of defense against water intrusion. If wind-driven rain gets beneath a seam or flashing, the barrier can help direct water away from the roof deck and toward the gutters. 

In some cases, metal roofing can be installed over an existing layer of asphalt shingles if the shingles are flat and the underlying structure is free of rot. Mountaintop Metal Roofing describes this approach as a “re-cover,” which can reduce tear-off labor and keep existing shingles out of landfills. 

Before installation, the company says crews should inspect the plywood decking, replace damaged wood and verify that the deck can securely hold the roofing fasteners. 

Learn more about Mountaintop Metal Roofing and the installation practices it recommends for residential metal roofing!

By Cotney Consulting Group. 

Responsibility should be established before several contractors begin working on the roof, not after water enters the building. 

A commercial roof may be accessed by far more than the roofing contractor. HVAC technicians, electricians, plumbers, solar installers, sign companies, communication contractors and maintenance personnel may all need to work on rooftop equipment at some point. 

Each contractor may be focused on completing a specific assignment. The problem is that their work can affect the roofing system even when roofing is not part of the original scope. A new penetration may be added. Equipment may be moved. Supports may be placed directly on the membrane. Debris may be left behind.
A temporary patch may be installed and forgotten. 

When a leak appears later, determining responsibility can be difficult. The roofing contractor may say another trade caused the damage. The equipment contractor may say the roof was already deteriorated. The owner may have no record of what the roof looked like before the work began. That is why responsibility should be established before several contractors begin working on the roof, not after water enters the building. 

The building owner must control rooftop activity 

Every contractor is responsible for avoiding damage to the property, but the building owner or property manager must establish and enforce rooftop access controls. Without an access policy, contractors may enter through an unlocked hatch, complete their work and leave without reporting where they were or what they changed. That makes accountability almost impossible. 

The owner should know who is accessing the roof, why they are there and where the work will occur. A simple access log can record the date, company, technician, purpose of the visit and rooftop area involved. For larger properties, contractors may also be required to check in with building management before accessing the roof and again upon completion of the work. The goal is not to make routine service difficult. It is to create accountability and ensure that everyone working on the roof understands the rules. 

Every contractor should have a defined scope 

Problems often begin when project responsibilities are assumed rather than written. The HVAC contractor assumes the roofing contractor will flash the new lines. The roofer assumes the electrician will provide the equipment supports. The owner assumes both contractors are coordinating. When those assumptions are wrong, important work can be missed. 

The written scope should clearly identify who is responsible for roof protection, penetrations, temporary weather protection, permanent flashing, equipment supports, debris removal and final inspection. If a contractor will need to cut, drill, fasten through or otherwise modify the roofing system, that work should be identified before the project begins.  

The scope should also explain who has authority to approve changes. A technician in the field should not be forced to improvise a roofing detail because the project team never decided who would handle it. 

The roofing contractor should be involved early 

The roofing contractor should not be called only after another trade has already altered the roof. By then, penetrations may have been cut, equipment may be blocking access and temporary repairs may have been installed.  

Early involvement allows the roofing contractor to review the proposed work and identify how it will affect the existing system. The roofer can advise where penetrations should be located, what flashing details are required and whether supports or walkways are needed. The contractor can also review drainage paths, warranty requirements and access limitations. 

This coordination is especially important on warranted commercial roofs, where unauthorized work may affect coverage. The roofing contractor does not need to manage every part of the project, but should complete, direct or inspect the work that alters the roofing system. 

Existing conditions should be documented 

Before major rooftop work begins, the existing roof condition should be recorded. Photographs should show the work area, membrane or roof surface, nearby seams, flashing, drainage points, equipment curbs and any known damage. A roof plan can identify where the contractor will be working. This protects everyone involved. 

The new contractor is not responsible for a puncture, an open seam or deteriorated flashing that existed before the work began. The owner has a record of the starting condition. The roofing contractor can compare the area after the project is complete. Without documentation, disagreements often depend on memory. A dated photographic record provides far better evidence than someone saying the roof “looked fine” before the work started. 

Roof protection should be planned 

A roof is a finished building component, not an unrestricted work platform. Contractors may need designated walkways, protective mats or temporary work surfaces when moving equipment and materials. Sharp tools, sheet metal panels, motors, compressors and other heavy components should not be placed directly on the roof membrane. Materials should be staged away from drains, scuppers and areas where they may block water flow. Workers should also avoid dragging tools, equipment or debris across the surface. 

Protection requirements should be discussed before the contractor arrives, especially when crane work, large equipment replacement or extensive service activity is planned. The cost of temporary protection is usually minor compared with the cost of repairing punctures, compressed insulation or widespread surface damage. 

New penetrations need clear responsibility 

A new pipe, conduit, support or electrical line may seem like a small part of the project. From a roofing standpoint, however, every penetration creates another location where water must be managed.  

The project scope should identify who will create the opening, who will provide the penetration component and who will complete the permanent flashing. A hole should not be cut in the roof with the assumption that someone will seal it later. Temporary caulk, tape or roofing cement may not provide reliable protection and can make the final flashing more difficult to install. The roofing contractor should use materials and details compatible with the existing roof system. Once the work is complete, the penetration should be documented and added to the roof records. 

Equipment supports must be coordinated 

Piping, conduit, ductwork and equipment should not be placed directly on the roofing membrane. Improvised supports can hold moisture, restrict drainage, concentrate weight and damage the roof as they move or vibrate. Wood blocking, loose pavers and unapproved supports are common examples of temporary solutions that become permanent. The appropriate support depends on the load, roof type, movement and equipment involved. 

Responsibility for designing, providing and positioning those supports should be established in writing. The mechanical or electrical contractor may determine what support the equipment needs. The roofing contractor should confirm that the selected support will not damage the roof or interfere with drainage. Both perspectives are necessary. 

Temporary weather protection must be assigned 

Some rooftop projects require the roof to remain open while equipment, curbs or penetrations are being changed. If the work cannot be completed immediately, temporary protection may be necessary. The project team should know who is responsible for keeping the building watertight during that period. 

This is especially important when delays occur due to weather, equipment delivery, crane scheduling or another contractor’s availability. A temporary covering should be designed for the expected conditions and inspected regularly until the permanent work is finished. Responsibility cannot be left unclear. When several contractors are involved, each may assume someone else is protecting the opening. The owner should require one party to accept that responsibility in writing. 

Debris removal is part of the work 

Rooftop work often leaves behind more than the equipment that was installed. Fasteners, wire clippings, sheet metal, old filters, packaging, pieces of insulation and abandoned parts may remain on the roof after the contractors leave. These materials can puncture the roofing system, block drainage and become windborne during a storm.  

The project scope should require each contractor to remove its own tools, materials and debris. A final cleanup should include the work area, access route and nearby drains. The roofing contractor or property representative should confirm that the roof has been left clean. The project is not complete simply because the equipment operates. It is complete when the work area has been restored, debris has been removed and the roofing system remains protected. 

Post-work inspection creates accountability 

A final inspection should be completed after major rooftop work. The inspection should verify that new penetrations are properly flashed, supports are correctly placed, drainage remains open and no surface damage occurred during the project. Photographs should document the completed condition. If damage is found, it should be reported and corrected before the contractors demobilize whenever possible.  

A post-work inspection benefits all parties. The owner receives confirmation that the roof remains watertight. The equipment contractor has the opportunity to address any issues related to its work. The roofing contractor can update the roof history and warranty records. Waiting until the next rain to discover whether the work affected the roof is not an inspection plan. 

Warranty requirements must be reviewed 

Commercial roof warranties may include specific procedures for alterations, penetrations and equipment changes. Some manufacturers require prior notification. Others require approved flashing details or inspection by an authorized contractor. A contractor unfamiliar with the roof warranty may complete technically acceptable equipment work but still create a coverage problem. 

Before the project begins, the owner should locate the warranty and confirm the requirements. The roofing contractor should document any authorized modifications and provide completion photographs or reports. Those records should be stored with the warranty and roof maintenance history. The owner should never assume that another trade can modify the roof without affecting warranty obligations. 

When damage occurs, facts matter 

Even with planning, roof damage can still occur. When damage occurs, the owner should begin with documentation and facts rather than assumptions. What work was performed? Which contractor accessed the area? What did the pre-work photographs show? Was the damage located within the work zone? Were penetrations or supports added? Was a post-work inspection completed? 

The roofing contractor should document the condition and explain how it may have occurred. The contractor responsible for the rooftop work should be allowed to review the findings. Insurance carriers may also become involved if the damage is significant. Clear records make these conversations easier. Without documentation, the owner may spend more time arguing over responsibility than correcting the problem. 

Emergency repairs should not erase accountability 

If the roof is actively leaking, stopping the water must come first. That may require immediate temporary repairs before the full cause can be investigated. However, emergency work should still be documented. 

Photographs should be taken before the condition is covered whenever it is safe to do so. The repair report should identify the location, the observed damage and the temporary work completed. 

After the building is protected, the owner can review the project history and determine what permanent repairs are necessary. An emergency should not become an excuse to lose the evidence needed to understand what happened. 

Coordination protects every contractor 

Clear responsibility is not only for the owner’s benefit. It also protects the contractors. An HVAC company should not be blamed for pre-existing roof deterioration. A roofing contractor should not be held responsible for an unauthorized penetration created after its work was completed. 

Written scopes, access logs and inspection records help separate existing conditions from new damage. They also reduce conflict between trades by making expectations clear before work begins. Good coordination allows each contractor to focus on its own expertise while understanding where its work connects to the roofing system. 

The owner must create accountability 

When several contractors work on the roof, responsibility cannot be left to chance. The owner or property manager should control access, define the scopes, involve the roofing contractor, document existing conditions and require a final inspection Every penetration, support, equipment change and temporary opening should have an assigned responsible party. 

Contractors should know how the roof must be protected and what records are required upon completion of the work. The roofing contractor, mechanical contractor, electrician and other trades do not perform the same work. Their responsibilities may be different, but their work often meets at the roof. 

When the owner establishes access controls, assigns responsibility in writing and requires documentation before and after the work, the project is far more likely to be completed without compromising the roofing system's performance.