Insulating a Hot Water Heater

Hot Water Heater Insulation

Installation Instructions

  • Cut three 2” wide strips of the InfraStop® double bubble insulation product at twice the circumference of the water heater (to be utilized as spacers).

  • Attach the three strips (doubled) around the circumference of the water heater (top, bottom and middle).

  • Cut the InfraStop® at a width equal to the height of the water heater. Secondly, cut the length of the product equal to the circumference measured on the outside of the spacers plus 1”.

  • If the water heater is taller than 48”, a section of product will need to be fashioned to make up the shortage. The seam between the 48” sheet and the “extension” piece will need to be taped with InfraStop® Foil Tape on both sides.

  • Wrap the InfraStop® around the water heater and tape the vertical seam with InfraStop® Foil Tape.

  • Trim product around pressure valve and cut on both sides of thermostat housing to create a flap type cover for easy access. Additionally, cut product away from the cover of the lower access panel.

  • Note: Electric Water Heaters Only - Cut a circular section of the product the size of the top of the water heater - trim to accommodate wires, pipes and relief valve. Tape (foil) the circular product section to the top of the water heater. DO NOT USE PRODUCT ON TOP OF GAS WATER HEATERS.

  • Note: Electric Water Heaters - Check to insure heater is wired to meet local codes.

  • Note: Gas Water Heaters - Do not install the insulation below the bottom of the water heater tank -This area is to allow combustion air to escape.

  • Note: All Water Heaters - Refer to owners or operating manual and follow any instructions provided for insulating the unit.

Wrapping Hot Water Heater

Foil Tape

Thermal Insulation

Pipe Wrap - R-4.5

Product Information

InfraStop® Insulation products are a group of technologically advanced materials. They are ideal for new construction or retrofit applications in commercial, industrial, metal and post/frame buildings, along with many other DIY applications. When you think of insulation, you should think of InfraStop®. Our products are recognized for their thermal performance, easy installation, versatility, price and environmental friendliness.


  • Easy to handle and install
  • Convenient roll sizes
  • Class A / Class 1 Fire Rating
  • Inhibits dew point condensation
  • Vapor retarder (0.02 perms)
  • Does not compress, collapse or disintegrate
  • Non-toxic / non-carcinogenic

Testing and Certification

InfraStop® products are thoroughly tested at either nationally approved independent laboratories or leading universities. Tests are performed to current American Society of Testing and Materials (ASTM) standards when a standard exists. For a copy of an actual test report, please e-mail us at

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