Foam Board Behind 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.

Foam board behind vinyl siding.

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. By filling the voids behind the siding s stepped profile the insulation makes the complete material stiffer and more resistant to warping and movement than conventional vinyl siding. Products can be used on wood steel framing or concrete walls. But if you use wood clapboard siding foam sheathing can cause trouble.

We re building a new home sw virginia with 2x6 studs on 24 inch centers. We had hoped to use 1 5 to 2 inches of eps rigid foam to the exterior of the sheathing then 3 4 inch x 4 inch plywood furring strips then lp smartside lap siding. This is most common with vinyl siding. Foamular extruded polystyrene xps rigid foam insulation offers a comprehensive line of products in a wide choice of sizes thicknesses and edges with a lifetime limited warranty for the life of the home or building.

Installing foam insulation under vinyl siding is a wise choice for homeowners who are seeking to protect their homes against moisture infiltration as well as improve energy efficiency. 1 2 polystyrine foam board insulation this is typically used to go over the existing siding in order to create an even surface to keep the siding plum during installation. 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. Installing foam board insulation under vinyl siding today more than ever before homes are being built with foam board insulation installed on the outside of the sheathing and under the siding.

Hollow vinyl solid pvc. You need to supply an air space behind the siding where incidental water can drain and the. Then i discovered that lp s installation instructions specify 1 5 inch x. The foam board is nailed in place with washer head nails should be taped at the seams to prevent air movement.

We knew we had to use the 76 series smartside product for the 24 inch centers. 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. In a typical situation. Insulated vinyl siding is standard vinyl siding with a backing of solid rigid foam insulation.