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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
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
R38 vs R49 60 attic insulation - GreenBuildingAdvisor I’m trying to get a sense whether its worth adding more insulation to my attic Climate zone 5A Currently has R38 insulation (R11 batt + R27 blown-in fiberglass) The attic […]
Will positive pressure work to vent an attic (i. e. , blowing air in . . . My father is interested in removing heat from his attic to try to keep the upstairs of his house somewhat cooler I have advised him that generally speaking, attic fans are a bad idea, which he has come to terms with However, with that understanding that creating negative pressure in the attic can cause all kinds of problems (sucking out air from the conditioned space, possible back-drafting
Blown-in fiberglass on top of batt insulation in attic . . . The photo below shows a thermal image of our ceiling with only R11 batt insulation installed Blown-in insulation will be added on top I’m trying to determine if using blown-in insulation is going to adequately fix all the thermal voids The attic has been air sealed
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 ventilation: Is it ok to have WAY more intake than exhaust . . . The total ventilation would exceed the attic floor area divided by 150, so does that mean it should be ok to have “unbalanced” ventilation? I am in southern Maryland in climate zone 4, btw I do have lots of insulation (just had more blown in) but there is no vapor barrier under the insulation Thanks so much in advance!
Controlling Humidity in an Attic with Spray Foam Insulation Using an exhaust fan in an encapsulated attic Since that time, we’ve been experimenting with ways to keep the attic humidity low One of the methods we’ve tried is using a small fan to exhaust air from the attic If the attic is properly sealed to the outdoors (and many spray foam attics aren’t), the replacement air comes from the conditioned space below the attic and is cool and dry
Efficiently and cost-effectively insulating an old attic with 2x6 . . . The attic has an air handler for air conditioning installed and we’d like to keep that In order to maximize the efficiency of our attic ductwork we plan on insulating the attic ceiling to bring it into the building envelope