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I am building in a VERY high wildfire risk zone. I am 20 miles (i.e. non-coastal) from ocean in southern california. I am considering non-vented assembly with spray foam and standing seam metal panels. Please advise as to best practices for me. Is standing seam best? non-vented? other advice? Thank you!
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12/23/2018
Or copy this URL: https://www.metalroofing.com/spirit/comment/23882/find/What is the design of the home and what region of the country?
Building to code is going to dictate what levels you need to insulate too, however, a sealed roof design is certainly more preferable for you.
Is the roof going to be SIP, rafter, or truss? Are you in the design phase?
An informed customer is the Best Customer!
12/23/2018
Or copy this URL: https://www.metalroofing.com/spirit/comment/23883/find/I am in the design phase. Single story. Not sure yet re SIP, rafter or truss- I am flexible ible on this but just a layperson and just starting the process. My home-site is in southern california, away from coast, in region that recently burned with wind blown embers at >70 miles per hour and chapparel for miles adjacent to my home. So my first priority in design is fire safety, in particular preventing embers blown by high winds from entering roof assembly.
Is there significant improvement re minimizing risk of ember entry in small spaces using vertical/ standing seam vs pre-formed panels or granular coated panels?
12/23/2018
Or copy this URL: https://www.metalroofing.com/spirit/comment/23884/find/I think non-vented can be done but if the house is too tight you may need some sort of HVAC system to bring in fresh air. There are some firesafe vents made primarily in CA that close down at high temps, to prevent ember intake. I think all metal roofs can be installed to prevent ember entry but mechanically seamed standing seam might be the "tightest" way to do things. Are you planning on steel on the walls as well?
Isaiah Industries, Inc.
12/23/2018
Or copy this URL: https://www.metalroofing.com/spirit/comment/23885/find/Right now i am planning fiber cement siding.
Do you think a metal roof that is not standing seam is more tightly sealed than conventional alternatives like concrete or clay tiles?
12/23/2018
Or copy this URL: https://www.metalroofing.com/spirit/comment/23886/find/With any product, a lot comes down to installation quality. However, I have seen things like bats and woodpeckers and snakes next behind tile roofs and I have not run into that with metal roofs.
Isaiah Industries, Inc.
12/24/2018
Or copy this URL: https://www.metalroofing.com/spirit/comment/23887/find/