Celotex Under Siding

The upper part of the cabin has standard batting and no form of exterior insulation under the siding.

Celotex under siding.

Hadleigh united kingdom business. So i was just was reading back to your original post and you stated that you have no plywood osb. The lower level has 2 in of xps rigid foam insulation on the interior walls. 1925 present headquarters.

Would it be better insulation if i remove the celotex and use a 1 foam board instead. My house has the black celotex fiber board under the aluminum siding on the first story and plywood on the second. Filed october 12 1990 and reorganized on december 9 1996. 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.

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. Insulation roofing and building materials asbestos trust. Then you ca nee install the celotex and then new siding. All it does is give you a flat smooth surface to properly nail your vinyl siding onto.

And even though some manufacturers call it rigid foam insulation for the purpose of vinyl siding it basically has the same insulating value as a piece of plywood. 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. 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. My research seems to indicate that the foam board product is waterproof.

I m going to be removing all of it and putting up new zip system sheathing and then new vinyl siding. Since i am doing this predominantly myself i of course have to be cognizant of the weather while things are exposed. This eliminates thermal bridging which is the energy lost through wall studs.