Is R13 Insulation Good For Attics

Leeseptember 13 2007 at 1 00 pm.

Is r13 insulation good for attics.

For diy attic insulation you ve got two choices. Department of energy rates r 13 insulation as good for use in walls in southern areas of the country it rates r 19 insulation higher designating it as great that is because r 19 insulation provides more thermal insulation than r 13 does. An existing house with r 13 in the attic and installing r 30 v r38 is a no brainer. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

The higher the r value the better the thermal performance of the insulation. R13 kraft faced batts in bags fiberglass insulation 372823 moisture resistant energy efficient and comfortable cuts heating and cooling loss easy install at the home depot. What is the right insulation for an attic. Installing additional insulation from r 30 to r 38 not so much.

What is the best r rating for insulation. The material cost is minimal compared to the fixed costs of the contractor to do either or your time to pickup a blower and 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. Insulation r value is only valid in still air.

If you have a breeze going through your attic from soffit or roof vents it will degrade the r value of exposed fiberglass insulation. Air migrates from warmer spaces toward colder spaces and insulation is designed to help prevent or at least slow that migration. Both can be added to uninsulated attics or layered over existing material. Loose fill or batt the common term for blanket insulation.

Building new hame same answer. Find the owens corning pink 3 1 2 in. Insulation level are specified by r value. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

Once you ve decided which type is best for you examine the material options and prices to home in on the right product. If your exterior walls are constructed from 2 by 4 inch studs the most insulation that can go into the wall while retaining its r value is r 13 or r 15 as these are both made to fit a cavity 3 1 2 inches deep.