Is R13 Insulation Good For Attics

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.

Is r13 insulation good for attics.

An existing house with r 13 in the attic and installing r 30 v r38 is a no brainer. Again when choosing insulation the r value that you need depends on where you live and what part of your home you need to insulate attics need insulation with a much higher r value than walls. 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. Air migrates from warmer spaces toward colder spaces and insulation is designed to help prevent or at least slow that migration.

Loose fill or batt the common term for blanket insulation. If you have a breeze going through your attic from soffit or roof vents it will degrade the r value of exposed fiberglass insulation. Insulation level are specified by r value. 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. R value is a measure of insulation s ability to resist heat traveling through it. What is the right insulation for an attic. Floors and crawl spaces need a lower r value than attics but they still require a higher value than walls.

Once you ve decided which type is best for you examine the material options and prices to home in on the right product. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Insulation r value is only valid in still air. 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.

Both can be added to uninsulated attics or layered over existing material. Building new hame same answer. Leeseptember 13 2007 at 1 00 pm. What is the best r rating for insulation.

Find the owens corning pink 3 1 2 in. The table below shows what levels of insulation are cost effective for different climates and locations in the home.