Rigid Foam Insulation Under Vinyl Siding

Although rigid foam insulation is more expensive than fiberglass insulation it is more efficient.

Rigid foam insulation under vinyl siding.

Heating costs increase every year making insulation more and more important. In a typical situation. 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. 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.

Installing foam board insulation under vinyl siding improved moisture control. 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. Apply sealant around windows doors and trim. Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold.

One of the biggest advantages to installing exterior rigid foam board insulation is improved. Nevertheless some manufacturers have no objection to the installation of vinyl siding over foil faced foam. To secure the foam use two inch cap nails. Exterior rigid foam board insulation can make a significant difference in overall thermal.

Fit the rigid foam insulation snugly and seal all seams with the specialized tape. Rigid foam insulation is one of the most important and efficient forms of insulation. Always follow the manufacturer s instructions for installing rigid foam insulation. 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.