Q: Our Mill Valley, Calif., home was built in 1957 and was not insulated. Every time a wall is opened up, we add insulation. Some say it would be a good idea to insulate the floor of our house. There is a crawl space under the house where we could reach the bottom of the floor. As the house is built on a slope, the crawl space varies from 2 to 8 feet tall. Others say insulating the floor may not be a good idea. In the summer, the house gets hot, and the coolness of the crawl space will help keep the house from getting hotter. What do you guys think? A: Without a doubt you should insulate the floor that separates the living areas from the crawl space. And rest assured you're doing absolutely the right thing by insulating the walls as you open them. You don't mention the attic spac...
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