Do I Need Foam Under My Vinyl Siding

Apply sealant around windows doors and trim.

Do i need foam under my vinyl siding.

Many people install vinyl siding or concrete board sding to improve the look and value of their home. This detail is used with both new construction and also with renovation work. 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. Fit the rigid foam insulation snugly and seal all seams with the specialized tape.

Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold. But herein lies the problem. Insulated vinyl siding is standard vinyl siding with a backing of solid rigid foam insulation. 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.

But insulated vinyl siding has one unique feature. To secure the foam use two inch cap nails. Tyvek under 1 4in foam for vinyl siding. How to install rigid foam under siding.

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. Certainteed vinyl siding with the correct rigid foam board backer makes this house look great. Contoured insulation that is permanently adhered to vinyl siding. Vinyl siding can be installed directly over wall sheathing wood siding or stucco.

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. By doing so however you miss out on the opportunity to add add energy savings to the project. The nails have a plastic cap that keeps them from damaging the foam. 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.

Below are some of the design details along with the benefits. If they use a backer board at all contractors will often call it and sell it as insulation board. In order for insulation to really do its job it needs to be in direct contact with what it is insulating. And just like flat insulating sheathings and fanfolds insulated siding also levels the wall for a better looking siding job.