Attic Batt Insulation R Value

Insulation level are specified by r value.

Attic batt insulation r value.

The higher the r value the greater the insulation performance. Recycled glass or sand that s melted and spun into fibers. Loose fill fiberglass seems to dominate attic insulation in new construction homes and has an r value of approximately 2 5 per inch. Insulation project calculator how to install naima r value certification product training videos colab learning video library for pros distributor locator why owens corning insulation propink vs.

Recommended home insulation r values. Houses in a cold climate should have a minimum of r 49 in the attic which is equivalent to approximately 16 of fiberglass insulation. Pros and cons of loose fill fiberglass attic insulation. Spray foam pink fiberglas vs.

When determining how much insulation you need don t guesstimate calculate. You can use the small pressurized cans of foam. 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. Warmer climates only require an r 38 or higher or about 12 or more.

For example a wall with 3 fiberglass batting r value of 10 8 11 9 may have an overall r value of nearly 14 because of siding sheathing and drywall. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. Lighter in weight than cellulose or mineral wool but it settles more than those materials so you ve got to put in a thicker layer to get the protection you need. R value measures how well certain building insulation materials can resist heat.

Know exactly how much you need with our project calculators. Some installations can yield a higher r value than traditional batt insulation for the same thickness and can fill even the smallest cavities creating an effective air barrier. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. However this value varies not only on the basis of the type of insulating material but also on the area.

The further north northeast you go the colder it is and the more necessary r value will grow. Like cellulose you need a big machine to blow it in. The higher the r value the better the thermal performance of the insulation. Foam in place insulation can be blown into walls on attic surfaces or under floors to insulate and reduce air leakage.

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. In general to optimally isolate an attic on average an r value of the insulation is required ranging from r 50 to r 60.