Reflective Attic Insulation R Value

A higher r value product takes longer to absorb 100 of it s potential and therefore is more effective at delaying the transfer of heat.

Reflective attic insulation r value.

Reflectix s stated r 14 r values for exterior walls are good only if the reflectix is paired up with r 13 fiberglass batt insulation. With multiple layers of product and airspaces between each layer enhanced performance will be gained. If the product is simply doubled with no air space between the layers a very minimal benefit is obtained r 1 1 per layer for the reflective double bubble product. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

Both conductive and radiant heat are trying to enter your home on a hot summer day or leave on a winter day when you are running the heat inside. As such a radiant barrier has no inherent r value. Batts and rolls are available in widths suited to standard spacing of wall studs attic trusses or rafters and floor joists. Air space equals r value if you don t provide air space this product provides almost no insulating value.

Achieving greater r values in exterior walls. Recycled glass or sand that s melted and spun into fibers. If you install 2 layers of a reflective insulation does the r value double. Radiant barriers reflect radiant heat.

Cathedral ceiling crawl space radiant floor wall hvac duct water pipe garage door knee wall r 21. This works to slow conductive heat. Energy saving residential applications include. 2 inch x 6 inch walls can use r 19 or r 21 products.

An easy to install double reflective double bubble insulation. The higher the r value the better the thermal performance of the insulation. Most estimates for installing radiant barriers reach in the thousands of dollars. Lighter in weight than cellulose or mineral wool but it settles more than those materials so you ve got to put in a thicker layer to get the protection you need.

Traditional attic insulation has r value. Basically a product with a higher r value is better than a simliar product with a lower r value. R values themselves don t mean much alone unless they are used to compare the effectiveness of different r. But for the homeowner who already has r 30 to r 38 insulation in the attic it won t help much.