Attic Floor Insulation R Value

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

Attic floor insulation r value.

Start with the attic floor. Insulation level are specified by r value. The higher the r value the better the thermal performance of the insulation. Because they have a high r value and can be used nearly anywhere in your home foam board insulation is one of the most common types of insulation.

Consider using high density r 30 batts which are as thick as r 25 batts but fit into 2x10 framing. Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. Provide the recommended level of insulation under floors above unheated spaces around walls in a heated basement or unventilated crawl space and on the edges of slabs on grade. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.

Plan to pull up the flooring and layer new. You can also add rigid foam insulation under the rafters which adds r value and eliminates thermal bridging through wood rafters. Foam board or insulating boards are rigid panels of insulation that have a high r value. Thermafiber residential mineral wool insulation commercial grade at home thermafiber residential mineral wool blankets are ideal for insulating walls floor ceilings and attic spaces in homes.

The higher the r value the better the thermal performance of the insulation. Insulation project calculator how to install naima r value certification product training videos colab learning video library for pros distributor locator why owens corning insulation propink vs. Attic insulation between roof trusses. But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates.

However if you keep the storage weight to a minimum you may be able to build a storage platform above the insulation by attaching supporting beams to the sides of the trusses. Insulate your attic to the recommended level including the attic door or hatch cover. These products provide a high r value inch excellent sound attenuation characteristics and outstanding fire performance. However rigid foam insulation must be covered with a fire rated material when used on the interior of a building.

Add the right kind of insulation. Best for floors foundation and basement walls interior and exterior wall sheathing and low sloped ceilings. Spray foam pink fiberglas vs. Insulation levels are specified by r value.

Even easier you can also use a prefabricated attic floor kit designed specifically to raise the attic floor above the insulation. R value is a measure of insulation s ability to resist heat flow. Stop using your attic for storage. The table below shows what levels of insulation are cost effective for different climates and locations in the home.