Over time the accumulation of dust and grime on your radiant barrier will diminish its effectiveness. However, since it is installed on the underside of your roof deck, it is safe to assume that minimal dust & grime will accumulate.
Just one even coat is sufficient.
No, only one coat is needed. Additional coats will not increase savings.
Yes. Radiant Barriers work in combination with effective insulation and proper attic ventilation to maximize your homes energy efficiency.
Heating and cooling systems consume 50% to 70% of the energy used in the average American home. You will save on your energy costs if you reduce the amount of energy needed for heating and cooling. Insulation helps your home retain heat in cold weather and reject heat in warm seasons.
It probably does not have enough. In much of the housing in America, attic insulation levels are inadequate at best. That’s because many home builders only offer standard, (not optimal,) levels of attic insulation, in order to maintain competitive selling prices. Obviously, the older the home, the less likely it is to have adequate attic insulation. But even in a newer home, additional attic insulation will save enough money in reduced utility bills to pay for itself, and those savings will, of course, continue year after year. Upgraded attic insulation will also increase the value of your house.
Heat flows naturally from warmer to a cooler space. In cold weather, it flows from heated rooms to the unheated attic, garage or basement, or to the outdoors. In hot weather, heat flows from outside your home to its interior. To maintain comfort, the heat lost in winter must be replaced by your heating system, and the heat gained in summer must be removed by your air conditioner. Insulation resists the flow of head, preventing unwanted circulation. Thus, in a well-insulated house, rooms stay warmer in winter, cooler in summer, will less energy expenditure.
The R-value rating refers to insulation thermal resistance – its ability to resist heat flow. The higher the R-value the greater the insulating effectiveness. The R-value of thermal insulation depends on the type of material, its thickness, and density. Installing more insulation in your home increases the total R-value and the resistance to heat flow.
That is not exactly true. Yes, you want your home sealed from air leaks but proper ventilation is vital to the overall condition of your structure and HVAC unit. A good ventilation system will help keep the rest of the house cooler with less energy usage. In cold months, ventilation prevents moisture build-up in the attic and draws damaging heat out of the attic in warm months. When warm moist air rises into a cold attic, and it can condense under the roof deck, causing the decking and shingles to distort and deteriorate. Excessive heat and excessive moisture can both lead to serious roof damage.
It comes from normal household activities, such as showers, laundering and cooking activities that can release as much as three to five gallons of water vapor a day. If the water vapor becomes trapped in the attic, it can cause roof decking and shingles to warp and distort. Additionally, lack of appropriate attic ventilation can void your home warranty.
The Energy Efficient Attic solution would consist of an adequate amount of soffit vents under the eaves for air intake coupled with a powerful Solar Ventilation fan, as Solar Fans are the most effective, efficient and environmentally friendly ventilation systems on the market. Solar Fans are durable enough to withstand harsh weather conditions and operate solely on sunlight, so maintenance is Free. Our Solar Fan can lower attic temperatures by up to 70 degrees.
As wind blows around the house, it created areas of high and low air pressure high pressure under the eaves and low pressure over the peak of the roof. Because air flows from high to low pressure; air in the attic will be pulled out through the ridge vent, to be replaced by air flowing in through the soffit vents. The system also takes advantage of thermal effect to ventilate even on calm days. We all know that hot air rises. The peak vent allows this hot air to continue to go u and out of the house, with cooler air being drawn in through the soffits.
R-value of radiant barrier is referred to the measurement of resistance to the flow of conductive heat transfer. In view of the fact that, radiant barriers are intended to reflect radiant and not conductive heat they do not have an actual R-value. With that said, any “theoretical” or “equivalent” R-Value relies greatly on the method of installation, size, and a number of airspace neighboring the material.
It can be laid over your current insulation like a layer or clipped under your rafters or crawl space.
It just works as how a foil paper will function, the way how thermodynamic principle goes. It is a natural law that heat always moves to colder areas. The problem is to make out a way that keeps heat out during the summer and in during the winter. Covering your attic with a radiant barrier will hold heat inside the house. Radiant barrier foil insulation is not like mass insulation that just slows down or defends against heat transfer. It blocks radiant heat. Just like wrapping a boiled egg in aluminum foil keeps an egg warmer by holding the heat, the radiant barrier, when covered in your attic, is said to give a warmer feel.
The first solid object that the space encounter is either absorbed or reflected because the radiant heat travels through space. Thereby in the winter, heat from the house, in general, radiates off the insulation into the attic space and it’s engrossed into the roof decking to be lost in the outer surface. Installing radiant barrier between the insulation and the crown reflects the heat flipside into the house thus reducing the amount of energy required.
It will vary depending on several factors like attic insulation method, house shading, duct leverage, geographical and air handler location… however, during summer you can save up to 30% on cooling bills and during the winter it works as a reflecting heat back towards the house thereby cutting down heat loss and increasing your overall savings.