Good R Type Insulation For Attic

Recommended home insulation r values.

Good r type insulation for attic.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. If the garage is open to the rafters the boards that support the roof use r 38 insulation between the rafters at the roof if they are 10 inches deep. And don t forget the ceiling. The higher the r value the more effective an insulating material is.

Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. For diy attic insulation you ve got two choices. Plus by law insulation in this wall is required to be fire rated due to the high probability of combustible liquids stored in this room and its lack of smoke detectors which adds an extra layer of safety to the space. Insulation level are specified by r value.

If an attic or bedroom rests above insulating this horizontal wall is crucial. Fiberglass is probably the most common type of insulation but be careful when handling it and. Spray foam attic insulation spray foam offers the best attic insulation performance available. Your home s r value score will guide you toward the type of insulation you need.

Once you ve decided which type is best for you examine the material options and prices to home in on the right product. 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. If the joists are 10 inches deep the cavity can take high density r 30 insulation which is 8 1 2 inches thick more than enough for floor insulation. Choose from two types.

Both can be added to uninsulated attics or layered over existing material. Batt and blanket insulation. The r value per inch for different types of insulation varies depending on the. What type of insulation should i use in my attic.

While there are additional considerations such as venting and moisture problems to take into account when you insulate under floors the united states department of energy recommends an r 25 rating in cold climates and an r 11 in warmer parts of the country. 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. In general an attic s r value should be. They sport insulation values of approximately r 6 5 and r 3 6 per inch respectively.