Double Insulation In Attic

For diy attic insulation you ve got two choices.

Double insulation in attic.

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. These insulation levels will keep heated air from migrating out in winter. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. In my attic i currently have usg thermafiber insulation in the 5 75 6 75 between joists with 9 unfaced fiberglass batts on top.

So it s time to pay close attention to what s happening up there. Typically houses in warm weather states should have an r 38 insulation in the attic whereas houses in cold climates should have r 49. In a cooling climate a good blanket of attic insulation helps keep the house cooler and reduces the load on air conditioning equipment. Both can be added to uninsulated attics or layered over existing material.

Below the joists is 1 5 16 center to center supporting lathe and plaster for ceiling below i am trying to create some walkways and storage space by placing boards on top of the joists. Once you ve decided which type is best for you examine the material options and prices to home in on the right product. A tip for doubling up on attic insulation. Loose fill or batt the common term for blanket insulation.