Is Rigid Foam Good For Siding

Apply sealant around windows doors and trim.

Is rigid foam good for siding.

Fit the rigid foam insulation snugly and seal all seams with the specialized tape. But it s possible that you are planning to replace your siding. Bottom line is exterior foam insulation is a good investment. Better at controlling moisture when it comes to controlling moisture rigid foam serves two functions.

While meps is not as resistant to water damage xeps polyurethane and polyiso rigid foam make effective barriers against moisture although sometimes a facing made of aluminum foil may have be needed. Siding over rigid foam a vented drainable air space keeps wood siding dry and stable. It s important to think about drying potential. A blanket of foam slows heat loss and it also slows drying.

Rigid foam insulation packs a lot of r value into a relatively thin package. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. It protects the wood sheathing or framing from any rain or water that leaks in under the siding. 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.

And it warms the interior sheathing or framing enough to prevent moisture accumulation from the heated interior air in the winter. The method works for both new construction and remodeling and doesn t affect siding and trim details very much. Using exterior rigid foam board insulation is a great way to make a building more energy efficient quieter and more likely to prevent moisture infiltration problems. Used in this way the foam lowers the loss of energy through framing members a phenomenon called thermal bridging and increases the overall r value of the roof or wall assembly.

One or more layers of rigid foam insulation help reduce thermal bridging and increasing wall r values but foam with foil facing or thick layers amount to an exterior vapor barrier. As noted above you ll also need to install new jamb and sill extensions for the windows and doors new window and door flashing and new furring strips. Eps is used under roofing over foundation walls and beneath siding. If so it s a good opportunity to add enough extra rigid foam to make your wall safer.

It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation. To secure the foam use two inch cap nails. The nails have a plastic cap that keeps them from damaging the foam. In reality rigid foam board which sometimes comes in fanfold usually only has an insulating factor of r 1 and does not add any appreciable insulation effect to your home.