Reflective Attic Insulation R Value

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.

Reflective attic insulation r value.

This works to slow conductive heat. Energy saving residential applications include. R values themselves don t mean much alone unless they are used to compare the effectiveness of different r. Basically a product with a higher r value is better than a simliar product with a lower r value.

Air space equals r value if you don t provide air space this product provides almost no insulating value. Radiant barriers reflect radiant heat. An easy to install double reflective double bubble insulation. With multiple layers of product and airspaces between each layer enhanced performance will be gained.

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. 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. 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. Achieving greater r values in exterior walls.

But for the homeowner who already has r 30 to r 38 insulation in the attic it won t help much. 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. The higher the r value the better the thermal performance of the insulation. Traditional attic insulation has r value.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. As such a radiant barrier has no inherent r value. Recycled glass or sand that s melted and spun into fibers. Cathedral ceiling crawl space radiant floor wall hvac duct water pipe garage door knee wall r 21.

2 inch x 4 inch walls can hold r 13 or r 15 batts. If you install 2 layers of a reflective insulation does the r value double. Batts and rolls are available in widths suited to standard spacing of wall studs attic trusses or rafters and floor joists. 2 inch x 6 inch walls can use r 19 or r 21 products.