Floor Joist Insulation R Value

Foam in place insulation can be blown into walls on attic surfaces or under floors to insulate and reduce air leakage.

Floor joist insulation r value.

Insulation rated on its ability to reduce thermal transfer or r value comes in rolls and batts that fit between joists. Whats people lookup in this blog. Floor joist insulation r value. In the application you are talking about you need actual insulation a material with an r value to slow down the heat transfer.

A continuous layer of rigid foam insulation on the underside of your floor joists would be better than a radiant barrier in the application you are talking about. Some installations can yield a higher r value than traditional batt insulation for the same thickness and can fill even the smallest cavities creating an effective air barrier. The thicker the insulation the higher the r value. For every type and material of insulation check the r value per inch of thickness that the manufacturer has listed.

If this crawl space has a concrete floor it may or may not have a vapor barrier under the concrete. Of course trade offs have their critics since such trade offs can easily result in comfort problems but playing with these software programs gives you a feel for the energy effects of changing. This type of crawl space also allows insulation with an r value of 19 installed in the floor joist if the crawl space and has a permanently installed dehumidifier. Insulation depends on.

The insulation should press right up against the floor between joists. A higher insulation r value usually means a higher price point as well. A wide number of software programs allow you to experiment with the effect of lowering the r value of one component and balancing that heat loss by increasing the r value of another component. The fiberglass will also need to be secured in place using wire mesh twine wood laths or other securing methods which can be an intensive project that adds to the overall cost.