AtticFoil™ radiant barrier (you can use either our double sided foil or our single sided foil for this application).So the layers would go like this, from the outside to the inside: If your siding is beveled or has a natural air gap, then furring strips are not required, so long as you have a minimum of half of an inch of space. This can be done with wooden furring strips to help give you about half an inch to an inch of air space. Unlike wrapping brick or stone exteriors with foil radiant barrier house wrap, siding material typically does not have a naturally occurring air gap behind it, so you must create one. To install the House Wrap Radiant Barrier remember that you always want to put the foil closest to the source of heat you are blocking – for an exterior wall that would be closest to the outside. Without an air gap, the foil will NOT WORK! With siding materials, like vinyl or Hardie board, we recommend you use furring strips (thin wooden strips) that you can lay either perpendicular (horizontally) or parallel (vertically) across the wall studs to create the necessary air space behind the siding. This principle goes hand in hand with the rule that radiant barrier must have an airspace on at least one side in order for it to work it works best when the gap is between the foil and the exterior cladding. It is important to understand that claddings (exterior sheathing) should be open completely you want air movement (circulation) behind the cladding because the more air circulation you have, the better the whole system works. Since this is the case, you should consider that older homes/buildings will not have the efficient improvements newer homes do, so it might be worthwhile for you to use our house wrap as an air barrier and as a SECONDARY drainage plane this occurs when you install AtticFoil™ over traditional house wrap, like Tyvek® for example. On homes with vinyl siding or Hardie board siding, we most often see a retrofit application of AtticFoil™ as a house wrap. Because building science has taught us that it’s generally more critical for wall assemblies to be able to dry out than it is for them to block water vapor, we recommend a PERFORATED foil for these house wrap applications (*note: Tyvek® is also perforated). Using a radiant barrier as a house wrap is rapidly gaining popularity and yes, you can add AtticFoil™ to the exterior of your home/building to maximize comfort by reflecting radiant heat on all sides. Radiant barrier foil house wrap AtticFoil™ replaces Tyvek® as a house wrap behind siding Using AtticFoil on sun-catching walls is an excellent way to make the home more comfortable & efficient in summer. Radiant Heat Flooring – Over Conditioned Spaces.Radiant Heat Flooring – Over Non-Conditioned Spaces.Cathedral Ceilings – Hot/Mixed Climates.
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