Jan 19, 2025 · Because the attic sits above an insulated but unconditioned garage, I have ~R-60 of blown in cellulose on the attic floor / garage ceiling. Since the cavities have 9.5 inches of rafter space, I had originally planned to add R-15 Rockwool batts to the cavities and, potentially, cover all of it with R-6 Rockwool Comfortboard 80.

Sep 30, 2024 · 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 ...

Nov 19, 2024 · The house attic is insulated with R-42 open cell foam on the roof deck, and there is currently no insulation in the garage attic. The wall between the house attic and the garage attic is drywalled and insulated with R-30 open cell foam on the house side. The garage has fire sprinklers, so the garage ceiling will need to be drywalled.

Jul 3, 2014 · It’s important to keep attic air out of the house and house air out of the attic. That's why the home performance industry and every above-code building program make it a top priority to fully separate attics from the rest of the building. When the attic isn’t fully air sealed from the living space and the combustion appliance zone, three undesirable scenarios can occur:

May 28, 2021 · The problem is attic ductwork. The main reason that anyone talks about conditioned attics is that some builders want to install ducts in the attic. Installing ducts in an attic is a bad idea, but many builders don’t know that. While locating ducts in an attic reduces installation costs for the builder, it increases energy costs for the homeowner.

Sep 9, 2021 · There is no vapor or reflective barrier on the attic ceiling, just wood and nails. During the day our house stays relatively cool with all the windows closed. But come around 7pm until about 11pm it’s hotter inside than out (all windows open now), and from a thermal camera it looks like the attic is dumping stored heat down into the house.

May 2, 2012 · Even though attic hatches can be huge air leaks and sources of radiant heat loss, they are rarely fixed. An attic hatch is usually located in a hallway or closet where the homeowners see it daily. Yet… I mean, once the homeowners fire up a blower door and whip out their infrared camera, the problems with attic hatches are pretty obvious.

Mar 24, 2025 · But you also want to reuce wind washing, and working in an attic is difficult. Like you, I've found hitting things with a can of spray foam is the simplest / easiest /quickest solution. It closes gaps, seals things, and adheres things, all with minimal precision needed. You can do it from an ackward position in the attic and get the job done.

Dec 6, 2013 · One of the interesting things about heat buildup in attics and asphalt shingle warranties tied to the amount of attic venting needed to keep the attic cool, is that I recorded temperatures immediately under shingles between 180 - 190 degrees on south facing slopes and just above ambient temperature under wood shingles.

Apr 24, 2015 · But attic ventilation baffles are always covered by insulation. If you install fiberglass batts between your rafters, the fiberglass batts protect the rigid foam baffles from igniting. That said, it's always a good idea to have an air barrier on the interior side of the fiberglass batts, and it is illegal to leave kraft facing exposed.