Installing Vinyl Siding Over Foam Insulation

Apply sealant around windows doors and trim.

Installing vinyl siding over foam insulation.

Plus rigid foam insulation applied over the outside walls. 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 nails have a plastic cap that keeps them from damaging the foam. Below are some of the design details along with the benefits.

Of foam and you can t use furring strips which are not a flat solid surface without voiding the warranty. It adds up to a robust system. Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold. A corresponding editor paul fisette responds.

Installing house wrap with 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. Always follow the manufacturer s instructions for installing rigid foam insulation. Installing vinyl siding over wood siding wood must be sound.

Siding over rigid foam. This detail is used with both new construction and also with renovation work. The answer happily is yes. Rigid foam will shed any water that gets past leaky vinyl siding.

Fit the rigid foam insulation snugly and seal all seams with the specialized tape. It typically is installed over rigid foam board insulation fastened to wood wall sheathing. If the wood siding is beveled or lapped you. The foam on the outside keeps the wood frame inside the wall warm and dry in.

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. Vinyl siding can be used in original construction or as a replacement for old siding. This type of insulation may change and flatten the specialty built in contour of the panel causing the siding to bulge or ripple. So technically speaking you can t nail through or even use 2 in.

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. In fact the two products combined make your home super insulated from outside wind and weather. Some manufacturers strongly recommend against the use of drop in type foam or fiberboard behind its vinyl siding.

Vinyl siding must be installed against a flat surface.