Good R Type Insulation For Attic
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.
Good r type insulation for attic. What type of insulation should i use in my attic. Spray foam attic insulation spray foam offers the best attic insulation performance available. The r value per inch for different types of insulation varies depending on the. For diy attic insulation you ve got two choices.
They sport insulation values of approximately r 6 5 and r 3 6 per inch respectively. 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. Your home s r value score will guide you toward the type of insulation you need. Closed cell and open cell aka 2 pound and pound respectively.
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. 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. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Recommended home insulation r values.
Loose fill or batt the common term for blanket insulation. Choose from two types. Both can be added to uninsulated attics or layered over existing material. The higher the r value the more effective an insulating material is.
Insulation level are specified by r value. These are large rolls of insulation that are easy to cut into usable shapes. Fiberglass is probably the most common type of insulation but be careful when handling it and. 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.
If an attic or bedroom rests above insulating this horizontal wall is crucial. 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. And don t forget the ceiling. 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.