Radiant Barrier

Kangaroo Contractors is a home repair and remodeling company offering proper installation of paint and foil radiant barrier in McKinney, Frisco, Allen, Prosper, Wylie, Sachse, and Murphy. We specialize in energy efficiency and savings.

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AtticFoil Radiant Barrier

The principal is very simple. The roof gets hot and radiates heat in all directions. Much of that radiant energy is going into your attic and then into your insulation. Radiant heat travels at the speed of light until it is either absorbed or reflected. In a traditional roof, the radiant energy is absorbed by the insulation, and then the heat eventually transfers into the living space causing high energy bills and comfort issues. By “breaking” this path of energy with radiant barrier foil, 97% of the radiant energy is reflected back towards the roof. The foil acts just like the sunscreen in a car. You are reflecting the HEAT not the LIGHT.

How Radiant Barrier Works

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High-Efficiency Radiant Barrier Coating

HeatBloc-Ultra is our newest radiant heat barrier coating. It has the highest 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 than our HeatBloc-75.

  • radiant barrier paintLow 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
  • Excellent investment, normally saves 10 – 15% of AC costs, improves comfort levels
  • Improves efficiency of existing insulation
  • The most economical way to retrofit radiant barrier to existing structures
  • Increase the value of your home

All of this can save you money by cooling your attic, so your A/C unit will run less. Its superb ability to reflect both heat (infrared radiation) and light make it an excellent, low cost substitute for metallic foils or metallized plastic films. High temperature tolerance, excellent radiant barrier paint adhesion and the ability to produce uniformly low emissivities on a wide variety of substrates makes radiance paint unique in the field of high technology coatings and fire retardants.

> Read more technical information on HeatBloc

To the right is an example of radiant barrier paint applied to the underside of a customer’s roof decking. We also evaluate your level of attic ventilation and insulation when providing an estimate. Please note that the underside of all the roof joists are painted in order to prevent thermal bridging or gaps in the radiant barrier paint coverage. Many contractors will skip this to save on material, lowering the overall effectiveness of the barrier.

Your Home Before Radiance Barrier Paint

  1. Heat and radiant energy is absorbed into the roof deck.
  2. Heat builds up in the attic.
  3. Heat transfers to the living area.
  4. Lower and lower settings are required to achieve comfort level.
  5. Energy usage climbs!

Your Home After Radiance Barrier Paint

  1. Prevents up to 81% of the radiant heat from radiating into the attic.
  2. Attic temperatures are reduced by as much as 20 to 30 degrees.
  3. Less heat transfers to the living space.
  4. Energy usage is reduced.
  5. Value of home may increase.

Other Areas to Consider

It makes good sense to spray the garage ceiling and especially if it is connected to the rest of the home where heat can be transferred by convection, and the garage will be used as a work area. East, south and west facing gable ends should also be painted. Painting interior vaulted ceilings where no attic space is available would also reduce energy costs.


Here is an example of an attic that needs radiant barrier. It was getting so hot in this attic the sap in the wood had actually leaked out of the roof joists. On this particular day it was 63 degrees outside and already 105 degrees in the attic! Check your attic to see if you can see little droplets of sap on the joists. If you can, then radiant barrier will help lower the attic temperature by 20 to 30 degrees along with proper ventilation.

Why Radiant Barrier In Your Home?

Radiant barrier insulation is a reflective insulation system that offers a permanent way to reduce energy costs. Radiant barrier insulation systems reflect radiant heat energy instead of trying to absorb it. A pure aluminum radiant barrier reflective insulation is unaffected by humidity and will continue to perform at a consistent level no matter how humid it may be. A radiant barrier insulation system is a layer of foil facing an airspace and is installed in the envelope of a building.

Most people are familiar with traditional insulating materials such as fiberglass, cellulose, styrofoam, and rock wool. These products use their ability to absorb or resist (slow down) convective and conductive heat transfer to insulate (R-value). A third, seldom discussed but dominant form of heat transfer exists – radiant heat transfer. What are the differences among the three forms of heat transfer?

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Conductive: Direct contact. If you touch a pot on the stove, this is conductive heat transfer.radiant-barrier-conductive

radiant-barrier-convectiveConvective: Steam, moisture. If you put your hand above a boiling pot, you will feel heat in the form of steam. This is convective heat transfer.

radiant-barrier-radiant-heatRadiant: Electromagnetic. Step outside on a sunny day and feel the sun’s rays on your face. You are feeling radiant heat transfer. All objects above absolute zero (-459.7 degrees F.) emit infrared rays in a straight line in all directions.

A radiant barrier reflects radiant heat energy instead of trying to absorb it. What does this mean in your home or business? During the winter, 50-75% of heat loss through the ceiling/roofing system and 65-80% of heat loss through walls is radiant. In the summer, up to 93% of heat gain is radiant. If you are depending on R-value (resistance) alone to insulate against heat gain and loss, remember that thin layers of fiberglass are virtually transparent to radiant energy and are affected by changes in humidity (moisture levels). A 1-1/2% change in the moisture content of fiberglass insulation will result in a 36% decrease in performance (referenced from HVAC Manual 10.6; McGraw-Hill). A pure aluminum radiant barrier is unaffected by humidity and will continue to perform at a consistent level no matter how humid it may be.

Call (972) 974-5720 for a free estimate for installation of radiant barrier in McKinney, Allen, Frisco, Prosper, Wylie, Murphy, Sachse and surrounding areas.

Schedule a free home energy audit today! We can save you up to 30% on your energy bills.

Call Kangaroo Today