Putting R30 In An Attic

In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended.

Putting r30 in an attic.

Recommended insulation levels for retrofitting existing wood framed buildings. I installed r30 rock wool batts in my rafter bays with a vented roof and conditioned attic space. For loose fill cellulose this translates to a total depth ranging from 8 inches. Make sure you use an unfaced batt one without a paper or foil layer so the insulation does not trap moisture in the ceiling.

Here s how to use 3 layers of 2 inch polyiso foam board to meet code and keep your ne. Now that you ve air sealed your attic and basement check your attic insulation levels and add more if necessary. Existing 3 4 inches of insulation. Wear a long sleeve shirt gloves eye protection and a dust mask.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. 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. Better than spray foam thermal break and relatively consistent r 30. Lay the batts perpendicular to the joists so they do not compress the insulation below.

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. The attic is the easiest place to add insulation to improve your comfort and the energy efficiency of your home.