Energy Savings Upgrades

Radiant barrier Radiant barriers (also known as Reflective Insulation) is one of the Thermal (Heat) Insulations to inhibit heat transfer by thermal radiation. Thermal energy may also be transferred via conduction or convection, however, and radiant barriers do not necessarily protect against heat transfer via conduction (without airspace facing to heat source) or convection (perforated). There are a lot of definitions about “Thermal/Heat Insulation” and the common misinterpretation of “Thermal/Heat Insulation” = “Bulk/Mass/Batt Insulation” which is actually uses to resist Conduction Heat Transfer with certain R-Value. Heat/ Thermal Insulation is a barrier material to resist / block / reflect the heat energy (either one or more of the Conduction, Convection or Radiation) to transfer from one side to another through the boundary between two systems which are at different temperatures from each other or from their surroundings. Heat transfer always occurs from the region of high temperature to low temperature Radiant Barrier (= Reflective Insulation) is one of the Heat/Thermal Insulation to reflect Radiation Heat (Radiant Heat) transfer from one side to another due to the reflective surface (or low emittance). As such Materials reflecting Radiant Heat with negligible “R-Value” should also be classified as “Thermal/ Heat Insulation”.     Roofs and Attics Radiant solar energy strikes the roof, heating the shingles, felt paper and roof sheathing by conduction, and causing the underside of the sheathing and the roof framing to radiate heat downward through the attic toward the attic floor. When a radiant barrier is placed between the roofing material and the insulation on the attic floor, much of the heat radiated from the hot roof is reflected back toward the roof and the low emissivity of the underside of the radiant barrier means very little radiant heat is emitted downwards. This makes the top surface of the insulation cooler than it would have been without a radiant barrier and thus reduces the amount of heat that moves through the insulation into the rooms below the ceiling. This is different from the cool roof strategy which reflects solar energy before it heats the roof, but both are means of reducing radiant heat. According to a study by Florida Solar Energy Center, a white tile or white metal cool roof can outperform traditional black shingle roof with a radiant barrier in the attic, but the black shingle roof with radiant barrier outperformed the red tile cool roof. For installing...
read more