Good R Type Insulation For Attic

The higher the r value the more effective an insulating material is.

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. Choose from two types. 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. Both can be added to uninsulated attics or layered over existing material.

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. What type of insulation should i use in my attic. Loose fill or batt the common term for blanket insulation.

Once you ve decided which type is best for you examine the material options and prices to home in on the right product. Insulation level are specified by r value. The r value per inch for different types of insulation varies depending on the. 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.

Spray foam attic insulation spray foam offers the best attic insulation performance available. Closed cell and open cell aka 2 pound and pound respectively. In general an attic s r value should be. 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.

Your home s r value score will guide you toward the type of insulation you need. And don t forget the ceiling. 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. They sport insulation values of approximately r 6 5 and r 3 6 per inch 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. These are large rolls of insulation that are easy to cut into usable shapes. Batt and blanket insulation. Recommended home insulation r values.