NRCA has updated their R-value recommendation for polyisocyanurate roof insulation with the publication of the 2011 The NRCA Roofing Manual: Membrane Roof Systems. The new recommendation for R-value ...

Understanding R-Values for Roof Insulation The R-Value is a way to gauge how effectively insulation blocks the flow of heat through it, which can keep heat inside your home on cold days and ...

To minimize the loss of thermal resistance in design, the R-value of roof insulation should be computed based on the actual performance of the insulation material and the local climate, says the ...

Homes and buildings need insulation to control inside temperatures. Are you getting the best value for your project? Here's a look at how R-Value affects what you pick.

A: R-value refers to the level of resistance to heat flow that insulation — from fiberglass attic insulation to pipe wrap — provides. Heat, of course, tends to radiate outward and upward, and ...

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Your home's R-value score will guide you toward the type of insulation you need. In general, an attic's R-value should be between R-30 and R-49. In particularly cold climates, you might go up to R-60.

EnergyShield XR is a polyiso rigid foam board comprised of a closed-cell structure with impermeable, durable facers that offer a high R-value per inch of thickness.

How to use the weather to check your loft insulation If snow and frost look patchy on your roof, it is a clear indication that heat is escaping and your insulation is not working as it should.