Rigid Foam Insulation Under Vinyl 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.

Rigid foam insulation under vinyl siding.

Whenever vinyl siding is installed over rigid foam with or without foil facing studs should be spaced no more than 16 inches on center and the thickness of the foam should be limited to 1 inch. Installing foam board insulation under vinyl siding improved moisture control. The by the book answer to your question is that vinyl siding manufacturers require a flat solid supportive surface and limit foam installed under their siding to a maximum of 1 in. 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.

Nevertheless some manufacturers have no objection to the installation of vinyl siding over foil faced foam. Fit the rigid foam insulation snugly and seal all seams with the specialized tape. 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. Rigid foam insulation is one of the most important and efficient forms of insulation.

Heating costs increase every year making insulation more and more important. It is designed to prevent a house from losing heat. Always follow the manufacturer s instructions for installing rigid foam insulation. Exterior rigid foam board insulation can make a significant difference in overall thermal.

Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold. Apply sealant around windows doors and trim. In a typical situation. The nails have a plastic cap that keeps them from damaging the foam.