Polyiso Under Vinyl Siding

Wall assemblies renovation 7 responses.

Polyiso under vinyl siding.

Is it ok to put 1 inch of eps under vinyl siding with no wall insulation. What kind of insulation do you recommend to put on my exterior sheet rock wall. The house was build in the 19970 s 2 4 walls and pink insulation between the studs. 12 2019 6 34 a m.

Polyiso for exterior insulation when re siding a building vinyl siding can be placed over a layer of p olyiso installed atop the existing exterior cladding. You can read all about polyiso and other rigid insulation panels here. 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. The windows were installed and flashed to the openings before the house wrap and the house wrap is sealed to the windows with a flashing tape.

Will this cause any condensation issues. Posted by roger smith nov. The siding a sheet product designed to mimic vertical boards is structurally sound so it is being left in place and then covered with house wrap and foam. I used 3 1 8 all weather cabinet screw from grk.

Over the weekend i did a model of vinyl siding over 1 5 rigid foam on a side wall of the addition. Polyisocyanurate foam for interior wall insulation. The house has wrap under the siding. Polyisocyanurate can also be used with exterior products such as fiber cement siding wood siding stucco and metal siding.

Polyiso comes in several thicknesses and is used over house sheathing underneath siding or in attic spaces where its reflective properties are very effective. This is an even more dense and more expensive foam board insulation. It also serves as an air barrier. I attached a sheet of polyiso to the wall and put a 4 high section of vinyl up over it.

I am happy to report that i am confident it will be secure enough. Generally referred to as rigid foam insulation this type of foam insulation is. How to install rigid foam under siding. It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat.