Do I Need Foam Under Vinyl Siding

Some manufacturers of vinyl siding do not recommend the use of drop in backers with certain vinyl siding configurations.

Do i need foam under vinyl siding.

Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold. As an alternative installation of specific types of drop in contoured foam underlayments for various styles of vinyl siding are available. Contoured insulation that is permanently adhered to vinyl siding. Vinyl siding can be installed directly over wall sheathing wood siding or stucco.

Apply sealant around windows doors and trim. To secure the foam use two inch cap nails. Certainteed vinyl siding with the correct rigid foam board backer makes this house look great. But insulated vinyl siding has one unique feature.

If they use a backer board at all contractors will often call it and sell it as insulation board. This will help your house wrap perform better and if you re already siding your house you may as well include it as installing it later will require a complete re siding. Many people install vinyl siding or concrete board sding to improve the look and value of their home. 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.

How to install rigid foam under siding. Vinyl siding must never be applied directly to studs without sheathing. Many houses built today have a double wall type of insulation with fiberglass batts fastened between the studs on the inside and rigid foam board over. By doing so however you miss out on the opportunity to add add energy savings to the project.

Similar to blown in insulation insulated vinyl siding provides r value for improved energy efficiency. Fit the rigid foam insulation snugly and seal all seams with the specialized tape. And just like flat insulating sheathings and fanfolds insulated siding also levels the wall for a better looking siding job. But herein lies the problem.

This detail is used with both new construction and also with renovation work. Below are some of the design details along with the benefits. Also during this siding process you may also consider asking your contractor to add foam insulation between the vinyl and the house wrap for increased r value. The nails have a plastic cap that keeps them from damaging the foam.