Celotex Under Siding

Hardie plank recommends a maximum of 1 of foam board celotex type material under their lap siding so the 1 2 foam and 1 2 celotex would be fine.

Celotex under siding.

Insulated foam sheets are also used as an insulated sheathing underlayment for exterior siding. The studs conduct more heat than the insulation between them. The upper part of the cabin has standard batting and no form of exterior insulation under the siding. Hadleigh united kingdom business.

Since i am doing this predominantly myself i of course have to be cognizant of the weather while things are exposed. We will be residing the cabin this summer and are wondering if adding 1 inch of xps rigid insulation on the exterior walls and walk out will cause any moisture issues. Celotex is just a ridged insulation so if that s all you have on your walls under the masonite then my recommendation is to remove the celotex as we ll and install plywood osb. Thousands of houses in my area built like that when i started in 1970 we used i sheet of ply in the corners and the rest was celotex now they are using 1 sheet of 1 2 osb in the corners and 1 2 foam board on the rest vinyl siding on that i don t know why we bothere with locks as anyone could go right thru any wall in 10 minutes with a hammer.

Would it be better insulation if i remove the celotex and use a 1 foam board instead. Then you ca nee install the celotex and then new siding. So i was just was reading back to your original post and you stated that you have no plywood osb. Insulation roofing and building materials asbestos trust.

My house has the black celotex fiber board under the aluminum siding on the first story and plywood on the second. The panels provide a continuous energy efficient surface. 1925 present headquarters. My research seems to indicate that the foam board product is waterproof.

The lower level has 2 in of xps rigid foam insulation on the interior walls. All it does is give you a flat smooth surface to properly nail your vinyl siding onto. This eliminates thermal bridging which is the energy lost through wall studs.