R-value

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R-value

A measure of the heat conductivity of material.The higher the R-value,the better the insulating qualities.The Federal Trade Commission,in something called the R-Value Rule,requires certain disclosures regarding insulation. Among other things, new home sellers must put the following in every sales contract: the type, thickness, and R-value of the insulation that will be installed in each part of the house.Failure to make the required disclosures amounts to a deceptive trade practice and is punishable by fines.For full text of the rule, see 16 CFR 460 available at the Government Printing Office Web site at www.gpo.gov.

References in periodicals archive ?
However, this occurs at the sacrifice of insulation value and percent closed-cell content; 4.
An insulation value of R-38 is now recommended, but even getting to R-30 would be great.
Chuck also stated that the IXP has twice the insulation value of fabric impact doors currently on the market.
Further increases will be constrained by slow residential construction activity and declines in single-unit housing starts, since the residential construction market accounts for more than 70 percent of overall fiberglass insulation value.
FlexShake[TM] shingles provide the resilience of a tire with more insulation value than traditional asphalt roofing products.
Those leaning toward HFC-245fa like its higher insulation value, which would help their refrigerators meet more stringent energy efficiency requirements.
This includes upgrading buildings by increasing their insulation value to present-day standards, installing the latest materials and cladding and making the buildings more user friendly by such things as improved access for the disabled.
Light transmission is about 80 to 85 percent that of glass--but the insulation value is twice that of glass.
uses a combination of glass fiber veils that act as a controlled light diffuser, patented InsolCore[TM] insulation to eliminate air convection, and Lumira aerogel (formerly called Nanogel[R] aerogel) to create a daylighting system with the same insulation value as that of a solid wall.
2) insulation tester hand generator type megger complete with testing leads & carrying case voltage 1000 volts, insulation value from 0-500 mega ohms make : waco / nippon / secor
The result is a center of glass insulation value of up to R-20, comparable to that of an insulated wall.
Once insulated, the roof would have an R-53 insulation value, perfect for our northern winters.