Best Insulation R-Value

Energy Star, a government-backed symbol for energy efficiency, recommends different R-values for insulation depending on the geographic location of the property. Depending on the climate of your locality, you can decide which r-value insulation suits you the best. Is the lowest r-value or the highest r-value that you should go for? 

Knowing this information is essential especially when you’re in the process of choosing the right insulation you need for your home. However, when you’re working with a dependable and reputable insulation contractor, they will also surely recommend the best kind of insulation according to your needs. Let us look at a list of lowest to highest R-value insulation.

Insulation R-Value

1. Cellulose: cellulose is the lowest r-value rated insulation with its r-value ranging between R-3.2 and R-3.9 per inch. Cellulose is the least expensive and easy to install. A thick layer of cellulose can be installed to provide high resistance to heat.

2. Fiberglass: next to our list is fiberglass, with again low r-value ranging from R-3.1 to R-4.3 per inch. Fiberglass insulation is primarily installed between studs, rafters, and joists.

3. Spray Foam: Spray foam insulation is available in two types – open cells and closed cells. Open-cell spray foams have an r-value of R-3.5 per inch, while the closed cells have has an r-value of R-6.0 to R-6.5 per inch.

4. Rigid Foam Board: Rigid foam insulation is available in the market in different materials polystyrene with r-value ranging between R-3.8 to R-5.0, polyurethane with an r-value of R-5.5 to R-6.5, and polyisocyanurate with R-value of R-5.6 to R-8.0.

You can know the best r-value for your house either by contacting a professional or consulting your neighbors who have already insulated their houses. It is always a good idea to have the right insulation in place to ensure the effective utilization of energy.