Is R13 Insulation Good For Attics

Floors and crawl spaces need a lower r value than attics but they still require a higher value than walls.

Is r13 insulation good for attics.

Both can be added to uninsulated attics or layered over existing material. R value is a measure of insulation s ability to resist heat traveling through it. What is the best r rating for insulation. Building new hame same answer.

Installing additional insulation from r 30 to r 38 not so much. Find the owens corning pink 3 1 2 in. Loose fill or batt the common term for blanket insulation. The higher the r value the better the thermal performance of the insulation.

Leeseptember 13 2007 at 1 00 pm. Insulation level are specified by r value. What is the right insulation for an attic. If you have a breeze going through your attic from soffit or roof vents it will degrade the r value of exposed fiberglass insulation.

An existing house with r 13 in the attic and installing r 30 v r38 is a no brainer. 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. 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. For diy attic insulation you ve got two choices.

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. 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. Insulation r value is only valid in still air. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

Air migrates from warmer spaces toward colder spaces and insulation is designed to help prevent or at least slow that migration. Once you ve decided which type is best for you examine the material options and prices to home in on the right product.