Recommended R Value For Attic In Texas

The higher the r value the better the thermal performance of the insulation.

Recommended r value for attic in texas. Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live. When determining how much insulation you need don t guesstimate calculate. The open cell polyurethane foam has an r value of 3 5 to 3 6 per inch with a price tag of 1 1 20 square foot. This helps reduce heating and cooling costs by making it easier to keep a consistent interior temperature during the extreme weather and hot temperatures that we experience in north texas.

Home insulation materials should be purchased based on their r value not the thickness or weight. Residents of southern and central texas should insulate their attics to at least r 30 or about 9 5 inches of conventional fiberglass batt insulation. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Blown fiberglass attic insulation has an r value of 2 2 per inch so 12 inches of it would give you an r value of 26 4 in your attic installation project.

Insulation level are specified by r value. Know exactly how much you need with our project calculators. R value measures how well certain building insulation materials can resist heat. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.

Yes generally a higher r value means a more effective insulator but the highest r value possible may not be necessarily right for your project. In order to maximize the insulating potential for most residential attics an r 60 is recommended. Blown fiberglass installed in the attic has an r value of 2 2 per inch so 12 inches of it would give you an r value of 26 4 in your attic installation project. Inspecting your attic insulation.

Insulate the garage s ceiling by using the recommended r value for your area as advised by the department of energy s oak ridge laboratory. Exterior walls if your exterior walls are constructed from 2 by 4 inch studs the most insulation that can go into the wall while retaining its r value is r 13 or r 15 as these are both made to fit a cavity 3 1 2 inches deep. R value is a measure of insulation s ability to resist heat traveling through it. The higher the r value the greater the insulation performance.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. For bigger jobs such as roof attic floor and wall insulation you will need professional help and equipment. What r value is best for my home. See the department of energy s doe ranges for recommended levels of insulation below.