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I recently had blown-in cellulose put in my attic. Can I install batt insulation over it to increase the R-value?

— Jon Tyler Bristol, RI

Answered by Danny Kelly on August 30, 2010

How do you insulate a home in Michigan that has a cathedral ceiling with exposed beams and no insulation? Roof is shingled.

— Claudia Ruehle Lansing, MI

Answered by Danny Kelly on August 24, 2010

Is there a strong argument for using a bubble insulation or foil product on trusses instead of just a radiant barrier to reduce attic temps?

— Justin Brooks Kernersville, NC

Answered by Danny Kelly on August 24, 2010

Is it wise to create an airspace between the roof and closed-cell spray foam to allow for venting?

— C. Monte Wardsboro, VT

Answered by Lee Hall on August 13, 2010

We live in DC, in a home built in the '50s with no insulation and a flat roof. The upstairs gets very hot in summer; any solutions?

— Shizua Oliver Washington, DC

Answered by Hamid Kashani - AIA, LEED Green Associate on August 4, 2010

Would you recommend foam insulation for a tight attic space?

— Ronnie West Hempstead, NY

Answered by Danny Kelly - KMC Green Team on July 16, 2010

A domestic hot-water pipe in our kitchen wall freezes in very cold weather. Solutions?

— gary t Hackensack, NJ

Answered by Danny Kelly - KMC Green Team on July 13, 2010

I live in a Santa Fe style house, the kind with a flat roof and no attic crawlspace. Is there a way to improve attic insulation?

— Bente Jensen Palm Desert, CA

Answered by Tammy Schwolsky, LEED AP, GPR, HPwES on July 11, 2010

Is three inches of batt insulation enough for my attic?

— Martin Bennett Bowie, MD

Answered by Steve Saunders on July 1, 2010

My roof has two layers of 4-inch foam insulation with a 2-inch gap between them. Do I need to vent this gap to stop condensation?

— Kerry Fenn Fort Lauderdale, FL

Answered by Bill Bradbury on June 1, 2010

 
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