Greetings From Chicago! I have a question. I have a dirt crawle that has a vapor barrier on the ground and up the foundation walls under my living room..Lo.ng for answers on how to insulate a crawle? All of the information is here. Spray foam or rigid foam. Insulation the floor joists or the foundation walls .Q Should we block our crawl .e vents or keep them open?.It’s not a matter of when you should close your crawle vents, but a question of at what outside temperature should I close them. The benefits of.
These vents allow outside air to circulate under the floor in summer to prevent the moisture buildup that encourages mildew and rot. In winter, when the air is drier, the vents are closed to reduce the chance that the pipes in the crawle might freeze.. I get asked this question a lot. Do you open your crawle vents in the summer or in the winter? Doing Home Energy Audits for a living, I get to spend a lot of time in people s crawles. I have the opportunity to help clients solve perplexing and frustrating problems that are making them lose sleep at . Crawl.e vents Open or Closed in the Summer? Let s simplify this argument once and for all. Here is a quick bullet point clarification on this topic from Precision Comfort Systems, your Indianapolis area comfort specialists..