Insulating with 3/4 Inch Thermal Break - New Roof for Steel and Metal Buildings

Insulation With a 3/4" Thermal Break - New Metal Roof Application

Installation Instructions

  • After the red metal is erected, install the InfraStop® double bubble insulation over the purlins by using 1/2” self-taping metal screws and screwing the product to the purlins.

  • Tape the seams with InfraStop® Foil Tape (goal is an air-tight, snug seam seal).

  • Install at least a 3/4” thermal break. If installing a standing seam roof, use clips with thermal breaks.

  • Install roofing either by screwing corrugated metal screws through the thermal break and insulation to the purlin or install a standing seam roof

  • If an interior finish is to be installed, attach to the bottom of the purlins.

  • This will create a 3/4” air space between the roofing and the insulation and an 8” air space between the insulation and the interior finish.

Standard Size for Metal Buildings: Square Edge and Staple Tab

Custom Size Rolls for Metal Buildings: Square Edge

Thermal Insulation

Open Interior - R-10* Heat Flow Down (and a Radiant Barrier) | R-4.5* Heat Flow Up

Please Note: In addition to the stated R-value, this application also provides a Radiant Barrier. As a result, a 94% + reduction of the radiant energy that ordinarily would be transmitted to the interior of the building is blocked.

*Includes thermal resistance of 1.32 UP and 4.55 DOWN for interior air film.

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

  • White One Side Metal and Steel Building Insulation Category
  • Metal and Steel Building Page

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