Cellulose - Page 3 of 4

New Insulation for Old Walls
You can upgrade insulation without gutting your walls, but not until you know what’s in there now.
How it Works: Heat Transfer Through Insulation
Insulation is an incredibly effective way of making sure that conditioned indoor air stays indoors.
Why I Don’t Use Cellulose or Blue-Jean Insulation
Just because it’s recycled doesn’t mean it’s green. Let me explain why I won't use cellulose or blue-jean insulation. . .
Unfinished-Attic Insulation Upgrade
Seal air leaks first, then blow in extra insulation for an energy-saving improvement that offers a great bang for the buck.
Tight houses and moisture problems?
Q: I’m building a house with 2x4 studs, sprayfoam insulation in the stud cavities, and blown-in cellulose insulation over a plastic vapor barrier in the attic. Ross E. Iverson, Sheridan, WY…
To housewrap or not to housewrap
Q: I am building a house in Michigan and don’t know whether to use housewrap. I plan to use oriented-strand-board sheathing, vinyl siding, and blown-in cellulose insulation. Is this an instance…
Roof venting
Q: What ventilation concerns do we face if we dense-pack cellulose into the rafter cavities between the ceiling and the roof? Bob Tidball, via email, None A: Bruce Harley, an engineer…
Does a roof always need to be vented?
Q: Our house will have cathedral ceilings. Is an airspace between the insulation and roof sheathing necessary? I am concerned about a loss in energy efficiency if there is no…
Does Fiberglass Still Make Sense?
Maybe, but other types of insulation offer installation advantages that make them more reliable.
Insulating With Cellulose
Blown in behind the drywall, high-density cellulose air-seals as it insulates.

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