Celotex Under Siding

The studs conduct more heat than the insulation between them.

Celotex under siding. My house has the black celotex fiber board under the aluminum siding on the first story and plywood on the second. 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. Would it be better insulation if i remove the celotex and use a 1 foam board instead. 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.

Filed october 12 1990 and reorganized on december 9 1996. 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. So i was just was reading back to your original post and you stated that you have no plywood osb. My research seems to indicate that the foam board product is waterproof.

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. Then you ca nee install the celotex and then new siding. Hadleigh united kingdom business. 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. The panels provide a continuous energy efficient surface. Since i am doing this predominantly myself i of course have to be cognizant of the weather while things are exposed. I m going to be removing all of it and putting up new zip system sheathing and then new vinyl siding.

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. Insulated foam sheets are also used as an insulated sheathing underlayment for exterior siding. This eliminates thermal bridging which is the energy lost through wall studs.