Putting R30 In An 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.

Putting r30 in an attic.

Here s how to use 3 layers of 2 inch polyiso foam board to meet code and keep your ne. In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended. Existing 3 4 inches of insulation. Add insulation to attic.

Better than spray foam thermal break and relatively consistent r 30. Wear a long sleeve shirt gloves eye protection and a dust mask. The attic is the easiest place to add insulation to improve your comfort and the energy efficiency of your home. For loose fill cellulose this translates to a total depth ranging from 8 inches.

Lay the batts perpendicular to the joists so they do not compress the insulation below. I would highly recommend a vented roof if you plan to use a metal through fastener roof like r or u panel which is extremely common in texas. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. I installed r30 rock wool batts in my rafter bays with a vented roof and conditioned attic space.

Recommended insulation levels for retrofitting existing wood framed buildings. I ve always said adding insulation to your attic is some of the best money you can spend to make your house more energy efficient but whether to use faced or unfaced insulation is a great question.