By Trevor Underwood, DECRA.
The roof of your home has a lot more to offer than just the visible roofing material - it's a complete roofing system with components like the roof deck, underlayment, flashing, ventilation, fasteners and more, including metal roofing systems that offer several advantages, and DECRA’s here to discuss its components and installation process.
A metal roofing system is made up of individual components that work together to protect your home from the elements.
The roofing system begins with the roof deck, which is the structural foundation of the roof. The roof deck provides a stable surface for the roofing material to be attached to and is typically constructed using plywood or oriented strand board (OSB).
Underlayment is installed over the roof deck to provide an additional layer of protection against the elements, as well as to provide insulation. The most common types of underlayment for metal roof systems are felt paper, synthetic underlayment and peel-and-stick synthetic underlayment.
Flashing is a thin piece of metal designed to help waterproof the perimeter of a metal roofing system. The most common types of flashing for metal roofs include drip edge, valley flashing and ridge cap. The drip edge helps prevent water from flowing into the fascia whereas valley flashing is installed in the valley between two sloping sections of the roof to channel water away. The ridge cap covers the joints between the metal roofing panels to prevent water from entering through the ridge.
Ventilation is essential in a roofing system because it creates a balance between air intake and air exhaust. Good attic ventilation will enhance the roof’s energy efficiency, reduce the amount of moisture that can build up in the attic and maintain a consistent roof temperature (which is critical for preventing ice dams in regions prone to heavy snow). There are two common types of vents used in the roof: ridge vents and soffit vents. The two work together to create a continuous ventilation system throughout the attic. Should the roof design or attic location not be able to accommodate these types of vents, gable vents are used instead. You can calculate how much ventilation a DECRA roof requires using our ventilation calculator.
Fasteners are non-corrosive screws or nails that are used to secure the metal roofing panels to the roof deck. Learn more about DECRA Metal Roofing fasteners here
Before you install a new roof, the roof deck needs to be prepared. This typically involves removing the existing roofing material and repairing any damage to the underlying roof deck. From there, underlayment is installed over the roof deck.
Flashing comes next in the installation process and is typically installed around any chimneys or vents. Trim is then added to the edges of the roof to achieve a finished and polished look, as well as to prevent debris from accumulating under the roof.
Metal roofing panels are then installed and fastened to the roof deck and the final touch comes in the form of adding hip and ridge caps to cover the joints between the metal roofing panels.
Metal roofing is the second most popular roofing material in the U.S. and growing in popularity year after year as homeowners become increasingly aware of the many benefits metal roofing has to offer, such as:
Original article source: DECRA
DECRA Roofing Systems has been setting the standard for nearly 60 years for metal roof shingles and is the original and leading manufacturer of stone coated steel roofing, committed to sustainability, quality and innovative product design. All DECRA panels are easy to use with rain catchment systems and solar panel systems. DECRA products are supported by a Lifetime limited warranty, a 120 mph wind warranty, and all steel profiles are non-combustible Class A Fire rated with Class 4 Impact Resistance to UL 2218. In addition, DECRA is a member of the U.S. Green Building Council, and the Cool Roofing Rating Council. Please visit us at www.Decra.com/.
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