HeatBloc-Ultra is our newest radiant heat barrier coating. It has the lowest (best) emissivity rating of any liquid product on the market today of .19. And our new Ultra product has almost no odor and very low VOCs so it is an even more environmentally friendly product.

  • Low emissivity, high reflectivity
  • Permeable, does not trap moisture
  • Easily installed using standard airless or air atomization spray equipment or rollers
  • Does not block cellular or antennae signals as can occur with foil products
  • One operator can easily install 1000 ft. 2/hour using a spray rig
  • Excellent investment, normally saves 10 - 15% of AC costs, improves comfort levels
  • Improves efficiency of existing insulation
  • Only economical way to retrofit radiant barrier to existing structures
  • Increase the value of your home

heat transfer using infrared of radiant barrier

Frequently Asked Questions

What Is A Radiant Heat Barrier?
Heat penetrates buildings in three ways: conduction, convection and radiation. Radiation is the transfer of heat by electromagnetic waves known as thermal radiation. Thermal radiation is a form of invisible light that travels through the air from a warm to a cool surface. Warm surfaces, such as roof decks warmed by the sun, will radiate or emit their heat to cooler interior building surfaces. Radiant heat barriers address heat flows by radiation. A radiant heat barrier is a low-e surface placed in the path of thermal radiation that blocks heat transfer.

What Is Heatbloc Attic Heat Barrier?
HeatBloc is an aluminum colored, water-based, low emissivity (low-e) coating. When applied to building materials such as plywood, OSB or plasterboard, HeatBloc lowers their surface emissivity to 0.25 or lower, thereby blocking over 75% of the radiant heat trying to enter the home. It is classified by ASTM as an Interior Radiation Control Coating (IRCC).

How Does Heatbloc Attic Heat Barrier Work?
HeatBloc radiant heat barrier works by changing the emissivity of the surface where it is applied. Building products such as wood, brick, and plasterboard have high emissivities (0.7-0.95). When heated, they radiate most of their heat to cooler surfaces by allowing the heat to penetrate the roof into the attic and from the attic into the house. HeatBloc lowers their surface emissivity to under 0.23, lessening their ability to radiate heat and therefore letting less heat penetrate the roof into the attic.

HeatBloc-Ultra radiant heat barrier coating

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