Cutting Insulation

To cut insulation squarely and accurately use a utility knife with snap off blade extended all the way out. Watch this video to find out more. ...More

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Cutting Insulation


To cut insulation squarely and accurately use a utility knife with snap off blade. Extend the blade all the way out and lock it. The resulting 3″- 4″ blade will make it easier to cut through thick batts of insulation.

  1. Position the insulation on a piece of scrap plywood where you want to cut it.
  2. Lay the straight edge of a piece of wood across the insulation.
  3. Kneel on one end of the insulation to compress it and run the blade down the edge of the wood for a nice square cut.

Remember, to keep the fibers from irritating your skin wear a long sleeved shirt, pants, gloves, dust mask and safety glasses.

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5 Comments on “Cutting Insulation”

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  1. dylan chalmers Says:
    June 14th, 2007 at 2:34 pm

    our homes is insulated but our insulation is
    purchased in batts.

  2. dylan chalmers Says:
    June 15th, 2007 at 3:53 pm

    cutting fiberglass insulation is easy but
    it can be uncomfortable due to the small
    glass fibers i would use corn starch before
    laying it out on the floor.

  3. dylan chalmers Says:
    June 15th, 2007 at 3:54 pm

    our insulation is r-25 and it is fiberglass.

  4. bill wallace Says:
    February 12th, 2008 at 1:13 pm

    How can one get all they need to foam insulate between the rafters? Could you please help me with product advice and equipment. I am a do it yourself type of guy.
    Thank you for listing

  5. Joshua Says:
    November 17th, 2008 at 10:01 pm

    Thanks so much for the video. Simple easy tips shown in the video will hopefully make it so much quicker and help me to do a better job.

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