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Should I vent my unvented garage attic? - GreenBuildingAdvisor I’m building a new single-story single-family house with an unvented attic and am looking for input on how to address my attached unvented garage attic The home is located in Northern California in climate zone 3-C (Marine), so mild weather year-round
Ducts in an Unconditioned Attic - GreenBuildingAdvisor Running unprotected ductwork through an attic can court problems Particularly in hot-humid climates, moisture can collect on the outside of ducts in summer Encapsulating ducts in closed-cell foam or following code-prescribed methods for burying ducts in insulation can prevent the problem Illustration courtesy Home Innovation Research Labs
Why is There Frost in the Attic? - GreenBuildingAdvisor Attic insulated with spray foam at the roofline Thermal bridging is reduced by spraying over the rafters Air leakage is reduced by encapsulating the attic By encapsulating the attic, the air in that space will be close to indoor conditions of temperature and humidity, but there won’t be any cold surfaces for water vapor to condense on
Is Venting an Unconditioned Attic Necessary? Venting an attic in cooling season The warm-climate, summertime problems of shingle life and cooling costs also show little improvement from attic ventilation Shingle life can be shortened by higher temperatures, and asphalt shingles do stay cooler with a ventilated attic But the effect is small, with only about six percent reduction in
Attic Upgrades and Ventilation - GreenBuildingAdvisor 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, then blow in cellulose insulation He asks if, while the attic is empty, it is a good time to perform other upgrades He is particularly interested in whether mechanical ventilation should be added
Does Spray Foam in the Attic Make It a High-Performance Home? Where an R-20 encapsulated attic does sometimes make sense is for existing homes If a homeowner has a set budget for improvements, using some of that to do R-20 spray foam on the roofline can provide a lot of benefit if ducts are in the attic and if it reduces air leakage significantly
All About Attics - GreenBuildingAdvisor 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 on the second floor of a Cape
Installing an ERV in an Unvented Attic - GreenBuildingAdvisor I’m finally done with the insulation project and trying to move on ERV project I have bought Panasonic FV-10VE1, have some questions regarding ERV and unvented attic The insulation on […]