Insulation Below Siding
How to install rigid foam under siding.
Insulation below siding. Homes settle and walls shift over time creating imperfections that can be seen through thin siding products. 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. To be completely efficient this insulation type has to mold perfectly with the inside of your home siding.
Below are some of the design details along with the benefits of installing exterior rigid foam board insulation. It is designed to prevent a house from losing heat. 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.
This detail is used with both new construction and also with renovation work. The bottom edge of the insulation is shaped to receive the top edge of the siding course below so the pieces overlap. The foam insulation also helps level the wall under new siding.
I get asked if this or that in the in the cavity works as well as foam under the siding. As many things in building science go you my dear reader have to learn something. 1 2 polystyrine foam board insulation.
When choosing it one should firstly pay attention to the manufacturer from the list listed above secondly the class of flammability it is better to choose non flammable and finally all its other properties. Rigid foam insulation is one of the most important and efficient forms of insulation. Although rigid foam insulation is more expensive than fiberglass insulation it is more efficient.
The foam board is nailed in place with washer head nails should be taped at the seams to prevent air movement. Most homes in the united states are built with traditional wood frame construction with studs every 16 on center. Why insulation under the siding is important.
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