Foam Board Under Fiber Cement Siding

Exterior rigid foam w modern hardie plank siding details.

Foam board under fiber cement siding. Foam behind fiber cement siding technically you can do up to an inch. In a typical situation. Addition to my house. I m an architect in wisconsin climate zone 6b and am planning to build a 300 s f.

Perhaps a few pro s on this board could elaborate as to the main reasons why. But if you use wood clapboard siding foam sheathing can cause trouble. If installing their fiber cement siding directly over rigid foam they do not recommend any more than 1 of rigid foam and they seem to prefer no more than 1 2 of rigid foam the main concern being that the nails will sag if driven through anything thicker than 1 of rigid foam. Alot of guys do not favor any insulation under fiber cement though.

Fiber cement insulated vinyl. I d like to side it in fiber cement siding to match the existing house. Almost any type of siding can be installed over the rigid foam cedar or redwood planks exterior plywood sheets cement fiber board or vinyl siding are common options. February 13 2013 exteriors insulation air sealing siding.

I ve become a big fan of utilizing outsulation on all my houses over the last 2 3 years.