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The JM Difference
The JM Difference Gorilla Wrap™ housewrap is one of many Johns Manville products that can be used in combination with each other to create superior structures.

  • JM has a complete line of Formaldehyde-free™ fiber glass building insulation.
  • Gorilla Wrap housewrap is made without formaldehyde and, used in combination with JM's Formaldehyde-free™ fiber glass building insulation, promotes better indoor air quality and a healthier environment.
  • JM’s Spider™ Custom Insulation System also is made without formaldehyde, again improving the air quality in your home, while lowering your utility bills and keeping your home quieter.
  • JM's complete line of fiber glass insulation is certified to contain a North American average of 25 percent recycled glass, including at least 20 percent post-consumer glass. That means JM insulation has more than double the post-consumer recycled content of ordinary fiber glass.
  • JM is dedicated to continuously developing new building products that contribute to the health and well being of your home.
That's the JM difference.