R-value is a measure of the resistance to heat transfer. R-value does a good job of measuring the effectiveness of mass insulation but has no meaning in terms of the reflective protection against radiant heat.

A reflective insulation reduces radiant heat transfer across air spaces by use of one or more high reflective/low emittance surfaces (Reflectivity of 90% or higher - Emissivity of 10% or less). This rate of heat transfer can be quantified in an R-value (for a specific application). See similar questions...

In the same way fiberglass or other mass insulations provide benefit, reflective insulation reduces conductive heat transfer. When a highly-reflective/low emittance material (such as aluminum foil) is installed in a building assemblage, in conjunction with an air space, (foil side of product) it provides a quantifiable R-value level of benefit. See similar questions...

R-value and U-value are reciprocal to one another. The term U-value is measured by the amount of heat that escapes a surface-a wall, ceiling, or window. R-Value is measured by insulation value. How many glass layers there are in a window to the type of gas that is between the panes of glass, are some of the basis of this measurement. The higher the R-value, the better insulated are walls and ceilings. The lower the U-value, the better job a window does in keeping out heat and cold. See similar questions...

The R-value is the measure of the resistance of a material to heat flow (or heat gain) by conduction only. The k-value is the measure of thermal conductivity; it measures the rate of heat transfer by conduction through a material from face to face. ASTEC's thermal conductivity (k-value) is very low (0.00345 W/m ?K or 0.00199 Btu/h ft ?F). A very low k-value indicates a good conductive insulator. See similar questions...

R-value is an assigned number derived from a specific testing procedure to determine a materials (or building assemblage) "resistance to conductive heat transfer". The higher the R-value, the more resistant a material (or building assemblage) is to conductive heat transfer. See similar questions...

No. Products with R-values reduce rates of "conductive" heat transfer and are tested for this characteristic. Radiant Barriers provide benefit by dramatically reducing "radiant" heat transfer which is just as quantifiable but not related to R-value type performance. See similar questions...

Our BTUFOIL tm Reflective Insulation is among the few insulation not affected by humidity. It's insulating value remains unchanged whether in a dry or very humid climate. In contrast, the r-value of mass insulation diminishes more than 35%, from an R-21 to R-13.65, with only 1.5% moisture content in the air. The average moisture content in homes typically exceeds 1.5%. See similar questions...

Reflective insulation and radiant barrier are designed to block RADIANT heat. Radiant heat travels through space from a warm surface to a cooler surface. It can be heat from the sun, an electric heater, or even holding your hand above a warm stovetop. Reflective insulation will block up to 97% of radiant heat, while regular bulk insulation (fiberglass, foam, etc.) will only block 10 - 20% of it. See similar questions...

Heritage has a standard R-20 wall insulation value. Heritage standard attic value is R-40. You may choose to Super Insulate your new home by increasing the walls to R-25 and the attic to R-50. See similar questions...

R-Value is a rating of the material resistance to thermal penetration. The higher the number, the better the protection value. Many circumstances change the R-Value rating. See similar questions...

R-value is derived from a controlled laboratory test of insulation’s resistance to conductive heat flow. BioBased 501 has an R-value of 3.83/inch. See similar questions...

The "R value" of a material or component measures its thermal Resistance. That is, it is a way to rate how effective the material or component is at stopping the flow of heat through it. The higher the R value, the more Resistance the material provides. For example, a 4 ? inch wide SIPs panel, with an R value of 15.2 will provide better insulation - more thermal resistance - than 2x4 dimensional lumber with fiberglass insulation with an R value of 13. See similar questions...

No. Our products do not operate in this manner. Minimal benefit is netted when the product is doubled. See similar questions...

GreenBean has a few different foam products of different densities that we use on different project types. We do not believe that there is only product solution for every project. Our main open-cell foam product has an R-Value of 5.0 per inch & our main closed cell product has an R-value of 6.8 per inch. Spray foam is the only insulation product that offers a true R-value because it is the only product that creates an air seal. Don't get caught up in the Myth of R-values. See similar questions...

When first installed, spray polyurethane foam's R-value is about 10 for a one-inch thickness. Over time, the R-value drops to about 7.0 (per inch) and stabilizes at that value. The time it takes to reach an R-value of 7.0 depends on a variety of factors, including total foam thickness. We report a six-month aged R-value. Many industry studies indicate that a one-inch thick sample of foam will stabilize after six months and maintain that approximate R-value for decades. See similar questions...

R Value - the measurement of 'insulating ability' of the material. The higher the R Factor number the greater the insulation value. U Value - the measurement of 'heat loss' through the material. The lower the U Value the less heat is escaping. See similar questions...