Installing Plastic Vapor Barrier Over Insulation

All walls should be insulated. Insulation keeps heat in during the winter and the heat out during the summer. A vapor barrier helps keep moisture from getting a hold on the structure of the home. This is especially important in bathrooms and kitchens where steam can cause moisture to leak from the inside. They also add an additional layer of insulation. Vapor barriers should be installed after the insulation has been inserted between the studs and before the wallboard is installed. You will need a couple extra sets of hands to accomplish this task efficiently.

Put a Vapor Barrier Over Insulation
  1. Measure the height of the wall. Lay a plastic vapor barrier sheet on the floor and cut the length to size. Repeat this process until you have enough sheets to cover the entire wall.
  2. Raise the sheet to the wall. Have two assistants each grab a top corner and raise the sheet to the corner where the ceiling meets the wall. Flatten the sheet out insuring that it covers the entire space from floor to ceiling.
  3. Attach the sheet to the studs. You can use a staple gun or a hammer tacker for this job. Be sure to staple the sheet up and down the studs ever foot or so. This will make for a secure vapor barrier.
  4. Cut off any excess plastic that hangs over the studs with a utility knife. Repeat this process until the entire wall is covered.

Things You Will Need

  • Plastic sheets
  • Staples
  • Hammer tacker or staple gun
  • Utility knife

About the Author

Steve Bradley is an educator and writer with more than 12 years of experience in both fields. He maintains a career as an English teacher, also owning and operating a resume-writing business. Bradley has experience in retail, fashion, marketing, management and fitness. He holds a Bachelor of Arts in English and classics.

Photo Credits