Insulation Under Siding R Value

The table below shows what levels of insulation are cost effective for different climates and.

Insulation under siding r value.

To meet the criteria. The r value of insulated vinyl steel and aluminum siding when you choose one of these siding products backed with quality foam insulation you will increase the r value of the siding to 3 0 4 0. Also called styrofoam insulation this is the least expensive material. Eps is used under roofing over foundation walls and beneath siding.

Using 2 x6 construction offers the potential for r value up to r 25. Notes on the r value k values of different forms of asbestos. It provides r values that range from 3 6 to 4 2 per inch. It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation.

In simple terms r values measure the effectiveness of insulation and a higher number represents more effective insulation. Products with a higher r value have a higher cost but have an increased capacity to resist heat flow and therefore provide greater insulation. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. To put the r value of insulated siding into perspective walls with 2 x4 construction are typically insulated in the r 13 to r 20 range depending on the type of insulation selected.

What may help though is the taping of the seams and the caulking of all penetrations through the siding once completely installed. Recommended home insulation r values. That s a remarkable improvement and that will make a tangible difference in how much energy is saved in your home. For instance if you have a material with an r value of 12 attached to another material with an r value of 3 then both materials combined have an r value of 15.

Each type comes with unique advantages. The insulation also adds some r value or insulating quality to the siding. The typical r value of this product is r 2 5 to r 3 5 depending on the density of the foam board. It has an r value of r 5 with its foam layer nearly 1 thick.

Notes to the table above. This amount of r value will make no difference in efficiency. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. The higher the r value the better the thermal performance of the insulation.

These benefits make insulated vinyl seem like an easy worthwhile upgrade to conventional vinyl but there s a significant cost increase with insulated vinyl and many builders and homeowners question whether the price premium is worth it. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.