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.
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 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.
Basically plywood or OSB sheathing with a thin aluminum facing on one side, radiant-barrier sheathing installs like any other roof sheathing. You just have to keep the shiny side face down.
Vapor barrier materials are installed on the warm side of the insulation in a building assembly, as determined by climatic conditions. In warm climates, it will be on the exterior and in cold climates, it will be on the interior.
Lastly, the geographic location of the construction needs to be taken into careful consideration when deciding the proper placement of a vapor barrier in relation to the wall assembly. Properly placed vapor barriers should be installed on the warm, humid side of a wall.
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.
* vapor barrier or vapor retardant is a material which does not allow water vapor to pass through it. * non5perforated radiant barrier is a vapor retardant (vapor barrier) and if used, it will not allow water vapor to pass through.
In cold climates, vapor barriers go on the warm side of insulation. In hot, humid climates, they go on the exterior side. Even with faced insulation appropriately installed, it's wise to have a separate vapor barrier facing the heated space.
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.
Alternatively, you can place one radiant barrier above your attic ceiling insulation and a second one below to maximize the beneficial effects in both summer and winter. Whichever approach you choose, don't allow any dust to accumulate on top of the reflective surface during the installation.
General rule of thumb is that the WATER barrier goes on the exterior wall, just under the outer cladding, and the VAPOR barrier goes on the warmest side of the wall, up against the sheathing. You can have only one water barrier, and only one vapor barrier, so you would need to remove the existing one.
Simply put, the biggest possible problem with any kind of radiant barrier is dust. To understand why dust creates issues for all kinds of radiant barriers, it's important to understand how they work: Radiation transfers heat directly outward from an energy source.
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.
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.
Shiny side up. Your vehicle hasn't flipped over after a rollover or accident. “Keep the shiny side up” means to have a safe trip.
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.
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.
When the paint is installed correctly, it will reflect about 75% of the radiant heat and can be a very good product. Getting good results with radiant barrier paint assumes a couple of things: The rafters are being sprayed completely (this usually costs more when you get an estimate).
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.
In cold climates, the barrier goes on the warm (interior) side of the insulation. In hot, humid climates, it's placed on the cool (exterior) side.
Vapor barriers are installed along, in, or around walls, ceilings, and floors. Of course this is done to prevent moisture from spreading and potentially causing water damage.