Insulation Under Siding Foil

Rigid foam insulation also known as insulating boards provide high r values.

Insulation under siding foil.

Continuous insulation under new siding has become a popular way to improve energy efficiency on an existing home because it addresses a problem known as thermal bridging. Install it anywhere from the roof to the foundation. Can vinyl siding be installed directly over foil faced rigid foam. Something about the foil reflecting to much heat on the hot sides and wrinkling the vinyl i used the 3 4 foil faced under the siding and on the south wall of my place it hits 130 surface temp in the summer and no wrinkle problem.

I am having the siding removed from our house and 2 foam board but under the siding. Tyvek wrap optional studs board. Will this cause any condensation issues. Since the product often costs more per square foot than 1 inch thick rigid foam rated at r 5 why would anyone use bubble wrap as insulation.

I thought i should show why continuous foam under the exterior siding is so important. Why insulation under the siding is important. The house has wrap under the siding. The windows are being removed and moved out the 2 to line up with the foam board.

I get asked if this or that in the in the cavity works as well as foam under the siding. Rigid insulation is one of the best tools to reduce your energy costs. Foil insulation is a radiant barrier and it works by. 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.

You can even place it under the foundation slab. Most homes in the united states are built with traditional wood frame construction with studs every 16 on center. The r value of foil faced bubble wrap is so low that it has few if any advantages over rigid foam. Iirc certainteed cedar impressions is about 100 thick and that could be why.

If you use the single sided remember the foil side must face the air gap which in this example would mean the foil facesout toward the siding. A corresponding editor paul fisette responds. Foil insulation underlayment is recommended under a metal roof and in most cases the shiny side should be facing up but there s a catch. Some vinyl siding manufacturers void their warranty for heat distortion when their siding is installed over foil faced foam.

The house was build in the 19970 s 2 4 walls and pink insulation between the studs. It also serves as an air barrier. They keep your home at a comfortable temperature without the need to crank your heat. Most brands of foil faced bubble wrap are only 3 8 inch thick or less and have an r value of only 1 0 or 1 1.

One study has shown that when vinyl siding is installed over foil faced foam the temperature of the back of the siding can be 8 f warmer than when it s. Generally referred to as rigid foam insulation this type of foam insulation is. Even if a home has insulation in the cavity heat can. By glenn hooper june 2 2015.