What is the best green insulation to use in our crawl space?

Question

What is the best green insulation to use in our crawl space?

Asked by L. Stephenson

We have a drafty crawlspace (comes up through the floor boards) in our 50 year old home. What can we use to keep out the drafts and the bugs and allow for access to vents and pipes if needed?

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Answers

Bill Bradbury's picture

Use 10 mm polyethylene sheeting on the floor and then closed cell spray foam directly on the walls.

  • This makes the crawl space part of the insulated envelope.
  • Check BuildingScience.comfor more specifics.

For more information:

Read "We have an unheated crawlspace under our house that we would like to insulate." a Q&A answered by Florian Speier.