Foam Board Under Fiber Cement Siding

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.

Foam board under fiber cement siding. Perhaps a few pro s on this board could elaborate as to the main reasons why. It gives another element that wants to be fiber cement or another rot resistant material. We show z flashing below the first course of siding and we show perforated board. 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.

Foam behind fiber cement siding technically you can do up to an inch. Fiber cement insulated vinyl. But if you use wood clapboard siding foam sheathing can cause trouble. Alot of guys do not favor any insulation under fiber cement though.

I m an architect in wisconsin climate zone 6b and am planning to build a 300 s f. Addition to my house. 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.

In a typical situation.