Insulation Under Siding Foil

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.

Insulation under siding foil. 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. You can even place it under the foundation slab. By glenn hooper june 2 2015. 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.

Rigid insulation is one of the best tools to reduce your energy costs. Install it anywhere from the roof to the foundation. Can vinyl siding be installed directly over foil faced rigid foam. 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. I am having the siding removed from our house and 2 foam board but under the siding. Rigid foam insulation also known as insulating boards provide high r values. I get asked if this or that in the in the cavity works as well as foam under the siding.

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. The windows are being removed and moved out the 2 to line up with the foam board. 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. Some vinyl siding manufacturers void their warranty for heat distortion when their siding is installed over foil faced foam.

Warranty isn t voided either. The house was build in the 19970 s 2 4 walls and pink insulation between the studs. Generally referred to as rigid foam insulation this type of foam insulation is. Iirc certainteed cedar impressions is about 100 thick and that could be why.

As many things in building science go you my dear reader have to learn something. I thought i should show why continuous foam under the exterior siding is so important. Will this cause any condensation issues. Why insulation under the siding is important.

Even if a home has insulation in the cavity heat can. Most homes in the united states are built with traditional wood frame construction with studs every 16 on center. A corresponding editor paul fisette responds. The house has wrap under the siding.

Tyvek wrap optional studs board. 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. Siding or hardiboard air gap via spacers atticfoil radiant barrier you can use either our double sided foil or our single sided foil for this application. 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.