R Factor For Live In Attic

2x6 walls can have r 19 or r 21 products.

R factor for live in attic.

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. 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. Houses in a cold climate should have a minimum of r 49 in the attic which is equivalent to approximately 16 of fiberglass insulation. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

2x4 walls can hold r 13 or r 15 batts. Therefore at least 11 inches of fiberglass or 9 inches of. They are available in widths suited to standard spacings of wall studs and attic or floor joists. The amount of insulation recommended for your home is dependent on where you live but here are some general guidelines.

In most climate zones of the country an attic r value of at least 35 is considered the minimum to meet today s energy conservation goals. 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. Recommended insulation levels for retrofitting existing wood framed buildings. Add insulation to attic.