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Roof Coating

 Roof Coating
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BTU,
205 E. 28th Street,
Bryan, TX 77803
Due to the overwhelming response and success of our rebate programs, we are currently accepting applications for our rebate programs by waiting list. As funding becomes available the applications will be handled in the order in which they are received.
BTU's Green Plus
Reflective Roof Coating Program

Roof Coating Product

Elastomeric Coatings are liquid applied, fully adhered, "rubber-like" protective membranes. They can be applied as part of a roof or wall system during the construction stage, in retrofit or as a maintenance application. Both primer and finish coats can be spray applied to ensure quick application, consistent appearance and a durable finish.

Sloped Roof
Before After
Sloped Roof Before Sloped Roof After
Flat Roof
Before After
Flat Roof Before Flat Roof After

Reduction of heat saves a roof by limiting thermal shock and extending its useful life. Elastomeric Coatings are very versatile and can be used on virtually any clean, dry and mechanically sound substrate including built-up, modified bitumen, single-ply, metal, asphalt, polyurethane foam or concrete roofs as seen below.

Asphalt Roof Concrete Roof Polyurethane Foam Roof Modified Bitumen Roof Metal Roof Single-Ply Roof
Asphalt
Roof

Concrete
Roof

Polyurethane
Foam Roof

Modified
Bitumen Roof

Metal
Roof

Single-Ply
Roof

Energy Efficiency

There are two things that keep a roof cool.
  • High Reflectivity
  • High Emissivity

Cool roof coatings reflect 70% to 90% of the sun's energy when newly installed. Most of the energy is radiated away. Conventional roofing materials have reflectivity of 5% to 25%, meaning they absorb 75% to 95% of the sun's energy. A typical “white” capsheet roof only reflects 25% of the sun's energy. The absorbed energy is transferred to the building.

Emissivity is the ability to radiate away absorbed heat. Most cool roof coatings emit 90% or more. Even though aluminum coated roofs are highly reflective they are not considered a cool roof because they only emit 50% to 60% of the absorbed energy.

A conventional roof can get up to 180º on hot sunny summer days. A cool roof coating keeps the roof at just 10º-15º above the air temperature. This means a cool roof can be 80º to 90º cooler than a conventional roof.

Even at relatively cool temperatures there is a big difference in how much heat is absorbed. The chart shown below, done by Lawrence Berkeley National Laboratory, demonstrates how different roofing materials are affected on a sunny day when the air temperature was only 55º.

Ambient Temperature 55° F
Roofing Material
Degrees F
Black Acrylic paint 142°
Galvanized steel 138°
"white" fiberglass capsheet 118°
Clay terra cotta tile 112°
Red acrylic paint 106°
White acrylic paint 74°
Hyper white acrylic paint 65°

Cooler roof surfaces means less heat is transferred into the building. If you air condition a building one will save money on cooling energy. How much savings will depend on many factors including roof insulation, cooling system equipment and other variables. In the right situation, a reflective roof can bring cooling savings of up to 50%, with a reduction in peak cooling demand of 10% to 15%.


* BTU reserves the right to change these offers at its discretion.
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