Zero Eave Design

Armando from Florida asks: Hello, I’m an architect working on a home with a steep slope and a zero eave design. I need understanding / details of how I can waterproof a zero eave as well as provide attic ventilation for a roof with zero eave, since there will be no soffit provided to allow intake air. Please advise

Hello Armando,  

Below is what our roofing expert Marty Stout from Go Roof Tune Up had to say in response to your question:

How you address this may depend on where in Florida you are designing for. Zero overhang requires building wrap to carry all the way to the top of the wall at the roof edge. The edge metal must be larger than normal (4"X6"). And the Roof material must have overhang at the edge metal. 

For the Eave, or lower, intake venting a number of ventilation manufacturers make vents that can be installed at the lower areas of the roof to provide the needed intake for the passive system. 

Check with the local Building Department to confirm requirements.  

Thank you for using AskARoofer! Find more resources to answer your roofing questions here: podcasts, articles, previously answered questions and more!