If an asphalt shingle roof is being installed, you should install the radiant barrier to the underside of the roof decking or roof rafters in the attic space below.
The first is stapling Original AtticFoil to the bottom of the roof rafters via the Staple Up Method. The second is laying SuperPerf™ AtticFoil® out on top of the existing attic floor insulation like a blanket. Alternate methods like the Flat Top and the Hybrid are just modifications of the standard Staple Up method.
The best way to make the heat convert to radiant heat is to make it cross an air space. This is why the radiant barrier is most effective when placed closest to the outside of the wall.
Radiant barriers that are reflective on one or both sides may be used with any of these locations. However, if the radiant barrier is reflective on only one side, the reflective side must face toward the main attic space for Locations 1 and 5.
Radiant barrier sheathing panels have two sides: a foil surface and a skid-resistant surface. LP TechShield panels should always be installed with the foil side down and the skid-resistant side facing up. Be sure to wear skid-resistant shoes during radiant barrier sheathing installation in a roof application.
Vapor Barriers
The facing of the insulation serves as a vapor barrier. Vapor barriers resist moisture penetration, keeping humid interior air from reaching cold surfaces where it could condense. In cold climates, vapor barriers go on the warm side of insulation. In hot, humid climates, they go on the exterior side.
If the radiant barrier is sandwiched against the surface and doesn't have that air gap, it becomes a means of conduction. The foil also happens to be a highly conductive material. As a result, it can transfer heat INTO your attic very effectively!
An air space must exist on a minimum of one side of the product (always on the reflective side (residential attic – preferably oriented facing down)). Radiant barriers by definition do not require an enclosed air space to provide benefit. This application (radiant barrier) is typically installed in a ventilated attic.
The tests to date have shown that in attics with R-19 insulation, radiant barriers can reduce summer ceiling heat gains by about 16 to 42 percent compared to an attic with the same insulation level and no radiant barrier.
if it is hot outside, the reflective part of your foil insulation must face outside. if it is freezing outside, the best orientation of the reflective part is inside. if you press the foil side of the insulation tight up against the wall (foil facing outward), the radiant barrier will not work.
Moisture problems, air leaks, inadequate attic ventilation, dust accumulation, compatibility issues with existing insulation, and condensation are some of the common challenges associated with radiant barriers.
When installing a vapor barrier in a basement, you should install it on the warm side of the wall, behind the insulation and framing. A moisture barrier, on the other hand, should be installed on the cold side of the wall, behind the siding and trim.
The radiant barrier can be installed directly against the sheathing, but installing the radiant barrier on the interior of the roof framing will perform better at reducing heat transfer because it has an airspace on both sides.
(The general rule for insulation is that the facing always goes toward the conditioned space.) The second layer of insulation should be unfaced so that moisture doesn't collect between the layers.
Tip 3: Determine the most vulnerable side – When installing insulation with a vapor barrier, the vapor barrier should usually be applied on the side of the insulation that's closest to where it will be exposed to the most warmth and moisture.
To harness the full potential of your car sun shade, it's important to position it correctly. The general rule of thumb is to place the reflective or metallic side facing outward, while the darker or non-reflective side faces inward, towards the interior of the car.
Apply the bubble wrap while the window is still wet and press it into place. The bubble side goes toward the glass.
Reflectix® or similar is widely available in most home improvement stores. It can be described as bubble wrap compounded with a layer of reflective Mylar, which functions as a radiant barrier. Meaning the Mylar reflects infrared heat back into the cabin rather than losing it through the glass.
Aluminum covered radiant barrier products (like Original AtticFoil™) are pretty difficult to start burning, but once they flash (catch fire) the polyethylene scrim inside will continue to burn at a relatively slow rate.
This is because an air gap provides an additional layer of insulation that helps to prevent heat from passing through the barrier and into the living space. If you are installing a radiant barrier, it's recommended to leave an air gap of at least 25mm (1 inch) between the barrier and the surface it's installed on.
Though there is a difference in how much heat the shiny vs. dull side reflects or retains, measured over time and considering the type of heat the oven emits, that difference is negligible and has little to no discernable impact on the food. That's why it doesn't matter which side you use.
The answer is that it doesn't matter which side faces up or down when you're cooking with traditional aluminum foil—but if you're working with a specific nonstick variety, which has a protective coating, be sure to use the side recommended by the manufacturer.
Either side of the foil can be used to place food on, unless you are using Bacofoil® The Non-Stick Kitchen Foil, then the food should be placed on the non shiny side side, as this is the side that is coated with a food safe silicon to stop food from sticking.