It’s much easier to install reflective insulation in a new home or building where you roll the foil over the beams from the outside and overlap it where it joins.ĭoing a retrofit installation in an existing house is much more difficult because the roof is already on. The effectiveness of the foil insulation depends on how the product is installed. Get a qualified company that has experience installing radiant barriers. In these combinations, the reflective insulation acts as the bulk thermal insulations facing material. The combined product is called factorylite if you go the fibreglass route or isofoil if you got the polyester route. To get the best of both worlds, you can combine radiant barriers with bulk thermal insulation like think pink aerolite ( fibreglass) or isotherm ( polyester) to achieve a higher R-value. Products like sisalation, spunsulation or alububble are very effective radiant barriers.ĬOMBINING REFLECTIVE FOIL WITH BULK INSULATION This is laminated to one or both sides of material such as craft paper, oriented strand board or fibre-reinforced products to increase strength. Radiant foil barriers consist of a highly reflective aluminium foil. There are many different types of reflective foil insulation available for purchase. You will save between 5% – 10% on cooling costs when used in hot and sunny climates. Bulk thermal ceiling insulation like fibreglass is the preferred insulation for cold climates. They are used to reflect heat so you won’t gain many benefits in cold regions. Reflective insulation is best used in warmer climates rather than cool ones. WHICH CLIMATES DO RADIANT BARRIERS WORK BEST IN? Using a radiant barrier for protection reduces the heat transfer from under the roof tiles and into your roof area where heat builds up fast. This heat travels by conduction into the roof, radiating solar heat into the cooler areas of your roof. When the sun hits your roof, it’s the radiant energy that makes the roof hot. There are 3 different ways in which heat travels from a warm area into a cool area. Radiant barriers don’t reduce heat conduction as thermal bulk insulation products do.įoil insulation or radiant barriers work by reflecting the heat source off the reflective foil. While keeping your interior cooling costs down. Their primary use is to reduce solar heat in summer from penetrating your roof. Additionally, they can be used instead of the usual plastic underlay for waterproofing. Usually installed in residential homes or commercial and industrial buildings. They reflect radiant heat instead of absorbing it. They are manufactured from highly reflective foil. Foil insulation is often referred to as reflective insulation or radiant barriers.
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