Installing Vinyl Siding Over Foam Insulation

To be an effective weather resistive barrier though the seams of the fan fold must be carefully taped since any seam can provide a pathway for water to reach the structure under the foam.

Installing vinyl siding over foam insulation.

If the wood siding is beveled or lapped you. Before installing vinyl siding over existing wood siding we first install a layer of fan fold foam insulation. Is the fan fold foam an adequate weather resistive barrier. Some manufacturers strongly recommend against the use of drop in type foam or fiberboard behind its vinyl siding.

To secure the foam use two inch cap nails. Of foam and you can t use furring strips which are not a flat solid surface without voiding the warranty. Existing wood siding must be in good shape with no rot or mold and fastened tightly to the wall. So technically speaking you can t nail through or even use 2 in.

Rigid foam will shed any water that gets past leaky vinyl siding. Siding over rigid foam. One of the biggest questions homeowners have about house wrap is whether it can be installed together with foam insulation. It typically is installed over rigid foam board insulation fastened to wood wall sheathing.

Fit the rigid foam insulation snugly and seal all seams with the specialized tape. Installing house wrap with rigid foam insulation. The foam on the outside keeps the wood frame inside the wall warm and dry in. This detail is used with both new construction and also with renovation work.

The answer happily is yes. Installing vinyl siding over wood siding wood must be sound. A corresponding editor paul fisette responds. 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.

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. In fact the two products combined make your home super insulated from outside wind and weather. Always follow the manufacturer s instructions for installing rigid foam insulation. This type of insulation may change and flatten the specialty built in contour of the panel causing the siding to bulge or ripple.

The nails have a plastic cap that keeps them from damaging the foam. Apply sealant around windows doors and trim. It adds up to a robust system. Below are some of the design details along with the benefits.

Plus rigid foam insulation applied over the outside walls.