How R-Value Affects Your Insulation Choice

Your money can “escape” through the holes in your attic. These holes could be the culprit behind your energy bill increases, especially during winter. A certain amount of heat leaves your home through these holes, which forces your heating system to work harder to sufficiently warm up your home.

Finding the Right Attic Insulation Based on R-Value

Consider conducting an energy audit to determine whether you need to fill in some gaps or if it’s time to replace your existing insulation. There are different ways to insulate your home in Kansas City, from spray foam insulation to blow-in-blanket.

But before you change your attic insulation, you need to understand the right R-value that will suit your home.

R-Value Determines Insulation Effectiveness

Generally, R-value refers to an insulating material’s resistance to heat flow. The Department of Energy (DE) explains that insulation with a higher R-value can be more effective. It adds that the effectiveness of some insulations may depend on aging, temperature, and moisture accumulation.

You can adjust the R-value of your insulation by adding more layers of the insulating material. The results may vary, however. For example, the R-value of loose-fill insulation may not increase even if the installed thickness increases. Unlike other insulations, loose-fill ones undergo compression under its own weight.

The recommended rating depends on your climate and type of heating and cooling system. Your attic insulation should have an R-value of R-30 to R-49. If your area has a colder climate, it may go up to R-60.

Attic Insulations Have Different R-Valuesr-value-attic-insulation

Insulations come in different forms and each of them provides different R-value ratings. This can help you find the right insulation for your attic to keep your home warm during winter and cool during summer. The types of insulations include the following:

Spray foam

  • Open-Cell polyurethane (R-value: 3.5 to 3.6 per inch)
  • Closed-cell polyurethane (R-value: 6.0 to 6.5 per inch)

Batts and Blankets

  • Fiberglass (R-value: 3.0 to 4.0 per inch)
  • Rockwool (R-value: 4 to 5 per inch)
  • Cotton (R-value: 3.5 to 4 per inch)

Loose-fill Insulation

  • Fiberglass (R-value: 2.2 to 2.7 per inch)
  • Cellulose (R-value 3.2 to 3.8 per inch)

Structural Insulated Panels (SIPs)

  • Polystyrene (R-value: 3.8 expanded (EPS) to 5 extruded (XPS))
  • Polyisocyanurate (R-value 5.6 to 7.7 per inch)

Spray foam and SIPs offer higher R-values compared with other insulations. The former, however, can fill spaces completely. It expands to fill the whole cavity because it’s made of foam. It also stays in place for a long time.

Keeping Your Insulation Effective

There are insulations that you can install on your own, but in some cases, you will need a professional’s help. For instance, insulation professionals should install spray foam because they have the right equipment and expertise to do the job correctly. Properly installed insulation can be more effective, so you’ll get your money’s worth.

Here at A+ Insulation, our team can help you minimize your energy bill by providing your home with quality insulation solutions.

We provide two types of spray foam. First is the closed-cell foam, which decreases humidity and has better resistance to water. The other one is the open-cell foam, which can cover hard to reach areas the closed-cell foam can’t.

If you have more insulation-related questions, contact us today. We also offer free, no-obligation inspection of your home to identify the right insulation for your attic.