How to Insulate the Crawl Space Under Your Home
By: Danny Lipford
My house has a crawlspace under it, and the floors get very cold in winter. What is the best way to insulate a crawlspace on a budget? -Margaret
Having a crawl space under your house can make your home colder in the winter than a house built on a concrete slab. Also, mold and mildew can be a problem in a crawl space, so you need to be sure to guard against that as well.
To make the floors in your home warmer, and prevent mold and mildew from forming in the crawl space, requires more than just insulation. Here’s how to go about reducing moisture and insulating a crawl space under your home:
- Enclose Foundation: If your foundation isn’t enclosed, fill the space between the exterior piers with bricks, concrete blocks, or lattice panels. To install brick or block walls, pour a concrete footing between each of the piers around the outside of the house, then lay bricks or blocks on the footing. Install foundation vents in the walls, so there is one-square-foot of vent space for every 150 square feet of crawl space. Another option is to make 2×4 frames from pressure treated wood to fit between the piers; then cover the outside with lattice, and staple landscape fabric on the inside to reduce (but not stop) air infiltration under the house.
Good luck with your project,
- How to Insulate Under Floors in a Basement or Crawlspace (video)
- How to Make Floors Warmer Over a Crawl Space in Winter (article)
- How to Reduce Mold and Moisture Under Your Home (video)
- Insulation R-Value (article)