Crawl space insulation might not be at the forefront of your mind but forgetting about it is an expensive mistake.

Crawl Space Insulation. When it comes to protecting your pipes from freezing, the first line of defense is insulating the entire crawl space and installing a vapor barrier.

Crawl space insulation will cost between $3,000 and $8,000 with an additional $3 to $7 per square foot for waterproofing, plus a vapor barrier can cost between $2 to $4 per square foot to install.

Some crawlspace projects—like full encapsulation, insulation or repairing structural damage—are best left to professionals. While it’s tempting to DIY everything, expert help can save you time and ...