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Problems with Attic Trusses - GreenBuildingAdvisor Problems with Attic Trusses If you are designing with attic trusses to create conditioned living space, be warned it is difficult to detail this assembly, making it susceptible to heat loss and air leakage Attic truss framing forms a space that, when conditioned for occupants, is challenging to air-seal and insulate well
Installing an ERV in an Unvented Attic - GreenBuildingAdvisor The temperature is about few degrees less or the same as outside temperature with stable RH If its 91 degrees outside with 70%RH, its expected to be 90 or 91 degrees with 45-50RH inside the attic 1) Noticed that the humidity is around 35 at the lowest and 52 at the highest and usually it drops down to around 40ish and stable
All About Attics - GreenBuildingAdvisor Types of attics There are several kinds of attics: The classic attic is located above a flat ceiling and has the same footprint as the house below Some attics are smaller than the footprint of the house, like the attic above the second floor ceiling of a Cape Some attics have a triangular cross section, like the attics behind the kneewalls
Are Powered Attic Ventilators Ever a Good Idea? Powered attic ventilators can keep an attic cool, but they also can cause combustion safety problems and increase your cooling bills [Photo by Energy Vanguard] It’s time to revisit one of my favorite topics: the powered attic ventilator Ten years ago, I wrote an article titled “Don’t Let Your Attic Suck — Power Attic Ventilators Are a
Attic Upgrades and Ventilation - GreenBuildingAdvisor The 1000-sq -ft attic has two small gable vents, the AC furnace system is 25 years old, the roof is a 6-7 12 pitch covered in clay tiles, and on hot days the attic temperature can reach 130°F BGG had an energy audit done, which informed his plan to remove the existing fiberglass batts, air-seal the attic, install a ducted heat pump system
Creating a Conditioned Attic - GreenBuildingAdvisor Most duct seams leak; as a result, supply ducts lose conditioned air to the attic, while return ducts suck in attic air — air which is hot in summer and cold in winter — and bring it to the air handler If access to the attic is through a hatch, servicing any HVAC equipment in the attic is awkward at best The bottom line: running ducts
Air Leaks From Your Home To Your Attic Need To Be Sealed Attic air may contain contaminants, including mouse droppings, fiberglass, asbestos, and mold If this contaminated air gets sucked into the living space, it can cause health problems for the occupants Air from the living space below can carry water vapor into the attic, hitting a cold place in the attic and causing rot and mold growth
How to Air-Seal an Attic Access - GreenBuildingAdvisor Inspect the attic access carefully to find any air-leakage pathways that need to be sealed For house plans, use the pen test Make it easy for occupants to use, including returning it to the sealed position Attics can be as cold as the outdoor air in winter and much hotter than outdoor air in summer
Fans in the Attic: Do They Help or Do They Hurt? Open your windows before you turn on the fan A whole-house fan is usually installed on the attic floor near the center of your house In the late evening or early morning, the fan is turned on to exhaust hot air from the house Cooler outdoor air enters through open windows, lowering the indoor temperature Image Credit: U S DOE
How to Insulate and Air-Seal Pull-Down Attic Stairs The first step is air sealing the finish trim and enclosure around the attic hatch Carefully pull down the finish trim (Pray that the installer used finish nails and not, say, ring-shank nails ) Set aside the trim and, using caulk for smaller gaps (less than 1 4″) or foam sealant for larger ones, seal the gap between the attic hatch