Bad crawle repairs can cost you thousands of dollars and actually make the crawle worse. Avoid these mistakes to ensure your home is . HIGH PERFORMANCE HOMES A Quick Reference on Closed Crawles . Seal exterior walls and mating surfaces at top and bottom of sill.Crawle Door Systems has supplied home owners, pest control companies, and contractors with quality air and flood products for over years..In short the answer is generally yes, they should be closed up during the winter months. If you follow our Monthly Maintenance Schedule, we recommend the month 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..