What is the best choice for insulating my home's crawlspace?

— Elizabeth Durham, NC

Answered by Michael Holcomb on September 30, 2013

Do I need a ridge vent if I have an attic fan?

— Chrissy Moorestown, NJ

Answered by Polly Osborne, FAIA, LEED AP on September 25, 2013

Should we replace the cast iron boiler in our 1968 home?

— Kathy L Mount Holly, NJ

Answered by Sean Lintow Sr on September 25, 2013

Can a 100 year old house cause allergy-like symptions?

— doug golenski New Bedford, MA

Answered by Lucas Johnson on September 16, 2013