DIY – “Green” Energy Barrier With AtticFoil® Over Attic Insulation

Oct 09
2014



Hey this is Ed with AtticFoil. com. In this video I'm gonna explain how installingAtticFoil Radiant Barrier helps to make your home more comfortable and energy efficientin colder climates. Now, if you've been doing some research on installing a radiant barrier,you've probably seen all kinds of wild claims. Claims like, "You'll save 50% on your utilitybills!" all the way down to, "It's a scam, don't waste your money, it's not worth it. "The truth is, it's somewhere in between. You're not gonna save 50% but it's definitely gonnahelp make your home more comfortable and energy efficient. In this video I want to explainthe science behind radiant barrier and how and why it works. Installing a radiant barriershould be part of an overall strategy to make your home more efficient. Hopefully with thisinformation you can decide if installing a radiant barrier is right for your home. Thefirst thing to remember is that heat always travels from hot to cold. So in cold weatherit's the heat getting out, not the cold getting in. We call this heat loss. The key to energyefficiency and comfort in cold weather is to reduce the amount of heat loss. Installinga radiant barrier will help in two ways. First, by reducing heat loss in its radiant formand second, by minimizing what's called "convective looping. " Convective looping is the airflowwithin your attic insulation that significantly reduces it's R-value. First, let me be veryclear: radiant barrier is NOT a substitute for traditional attic insulation. They'llactually work TOGETHER to maximize the comfort and efficiency in your home. Regular insulation,whether it be fiberglass or cellulose, works to reduce CONDUCTIVE heat loss, whereas aradiant barrier reduces RADIANT heat loss. When you install AtticFoil Radiant Barrierdirectly over your attic insulation, it's gonna work off two qualities: reflectivityand emissivity. Reflectivity is the ability to literally bounce radiant heat back towardswhere it came from; this is just like a mirror. Emissivity is the ability NOT to transferheat (stored energy) into it's radiant heat form. When you wrap a potato with foil tokeep it hot, it's working off its emissivity quality. So essentially your attic insulationbecomes like a big baked potato with the foil on top. Heat (energy) that is stored withinthe insulation, does NOT want to transfer into the attic because of the emissivity qualityof the radiant barrier (foil). The second way installing AtticFoil reduces heat lossis by minimizing convective looping within the insulation. What that means is that installinga radiant barrier will help make your existing insulation even more efficient. Traditionalinsulation works to reduce heat loss by slowing conductive heat flow - this is called R-value. However, to maximize R-value, the air inside the insulation must be perfectly still, orwhat we call "dead air. " Think about how a wall is built. The air inside the wall ispretty much dead, or still, air. The problem is your ceiling is just a wall turned sideways. Unfortunately there is no air barrier on the top side. This allows air to flow into theattic insulation and significantly reducing its effectiveness. If you were to take theouter wind-layer off a jacket, it would have the same effect because now the air betweenthe two layers is no longer still, or trapped, or dead air. Here's how convective loopingworks: in the attic, warm air near the ceiling rises and cold air, which is heavy and dense,will fall through the insulation. This air movement can significantly reduce the R-valueof the attic insulation. The colder it gets, the more air movement. This is one reasonR-values DECREASE in colder temperatures. By installing AtticFoil on TOP of the insulation,it helps act as an AIR barrier and will reduce the amount of air movement in the insulationand help maintain the R-value. So when you install AtticFoil radiant barrier, you'regonna achieve two things: first, reduce the amount of radiant heat LOSS and secondly,reduce the amount of air movement within the insulation, which will cause it to be moreefficient. Installing Radiant Barrier AtticFoil is a great do-it-yourself project and youcan save hundreds or THOUSANDS of dollars by installing it yourself. Finally, don'tforget about the summer benefit of installing AtticFoil Radiant Barrier. Radiant heat thatwould normally come off the roof and be absorbed by the attic insulation is now gonna be reflectedback. That means the insulation will stay cooler - that means less heat gain into yourhome. Less heat gain means your air conditioner will run less, it'll save you money, AND yourhome will be more comfortable in the summer. For more information, visit AtticFoil dotcom, your complete online source for Radiant Barrier Foil. }

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