FAQ: Does dust accumulation affect the performance of a radiant barrier over time? ANSWER: NO, as long as you are using a double-sided radiant barrier and at least one side it facing at least a 3/4″ air space. A very common misconception in the insulation industry is that dust in an attic space will eventually render an installed radiant barrier ineffective over time as it collects over its surface. It is true that dust will eventually collect in varying degrees on [...]
FAQ: Do aluminum foil insulation products lose their reflectivity over time because of oxidation? ANSWER: No, a high quality aluminum foil insulation products reflectivity is NOT AFFECTED by the natural oxidation process. All aluminum surfaces oxidize when exposed to oxygen and this oxidation process produces a CLEAR layer over the top of the surface of aluminum. This clear layer will increase in thickness to a point where the oxygen in the environment can no longer continue the oxidation process. High quality aluminum foil insulation products [...]
RadiantGUARD® products are designed to meet the Prescriptive Path requirement for homes in IECC Climate Zones1-3 that have more than 10 linear feet of ductwork located in an unconditioned attic. See Exhibit 1 of the ENERGY STAR Qualified Homes, Version 3 (Rev 05) National Program Requirements at www.energystar.gov/newhomesguidelines.”
An R-Value is the measurement of a material’s ability to impede the transfer of heat and is based on product thickness and elapsed time for the heat to transfer from one side through to the other. Radiant barriers reflect radiant heat and therefore, R-Value tests are not applicable to radiant barriers per the FTC.