How to Insulate Under the Floorboards

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A cold floor is nothing fun to step on first thing in the morning on a cold winter day. There is a simple solution to this problem--insulating your floorboards. This adds to the comfort of your home but also may help to lower your heating bill. The installation process is not difficult.

Things You'll Need

  • Sheet insulation or roll insulation
  • Insulation hangers
  • Shrub trimmers
  • Marker

Prepping for the Job

  • Lower yourself into the crawl space or enter your basement. Remove any drop ceiling if you are working in your basement. There should be no tools needed. A drop ceiling is merely a set of ceiling tiles suspended from the floor joists.These can be removed by hand. Examine where the electrical cords are so that you do not damage them.

  • Place all of the insulation either in the crawl space or take it down to your basement. Bring the insulation hangers with you and the shrub trimmers. Having everything in one place will make the job go quicker.

  • Start installing the insulation in the farthest spot from the entrance to the crawl space. If it is a basement, select a wall and work from there. Start by placing the insulation in between the floor joists. When you have a piece up, simply push one of the insulation hangers into place. Space the hangers about 18 inches apart. Repeat this process, working in a linear pattern.

  • Cut the insulation. When you reach the end of the first row, using a marker to mark where you'll make your first cut. Cut with the shrub trimmers. If you do not have shrub trimmers, use large scissors or even a razor knife. Shrub trimmers just make the job easier and quicker and also make a more accurate cut.. Continue until the floor is covered.

Tips & Warnings

  • Make sure you wear a mask, a hat and long sleeves to keep the fiberglass off exposed skin.
  • Remove clothes and immediately wash them alone. It is also advisable to take a shower immediately after finishing the job. Make sure that you have washed off all of the fiberglass because it will cause you to itch.

References

  • "Time-Life Books Complete Home Improvement and Renovation Manual:" Bob Vila and Time-Life Books; 1991
  • "How Your House Works: A Visual Guide to Understanding & Maintaining Your Home," Charlie Wing; 2007
  • "Homeowner Basics (Black & Decker Complete Photo Guide):"Jodie Carter, Matthew Palmer, Steve Wilson, and Jerri Farris; 2008
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