Hi, I'm looking for some advice on air sealing the around the mantle of a fireplace in the crawlspace. Should I just apply spray foam as needed? Any tips would be appreciated. Thanks!
Do you mean around the underside of the hearth? Are you trying to seal between the inside of the house and the crawlspace? If so, could I suggest that, instead, you take the approach of creating a conditioned crawlspace? Martin Holladay just wrote an excellent post on this topic on Green Building Advisor http://www.greenbuildingadvisor.com/blogs/dept/musings/building-unv...