making decisions about roof replacements

making decisions about roof replacements

Cooling Roof Coatings For Asphalt Roofing

by Lorraine Fisher

With intense summer temperatures in full swing, increased cooling costs are inevitable. However, there is a lot you can do to increase the energy efficiency of your home and keep cooling costs down. The roof is an especially vital component of your home cooling, and investing in making it more energy efficient can translate to huge energy savings.

Flat asphalt roofs heat up rapidly when exposed to sun rays and can absorb most of the solar heat blasting onto the roof. A reflective roof coating can help cut down on air conditioning by decreasing the heat retention properties of asphalt shingles and improving the effectiveness of the available roof insulation. Roof coatings also reduce heat-related cracking, preventing roof deterioration.

Here is a look at 2 popular cooling roof coatings that could work for your asphalt roof.

White reflective coatings

These are high-quality polymeric coatings that are made of acrylics mixed with an opaque, white reflective pigment for enhanced reflection. This makes them very effective at cooling down asphalt roofs as well as protecting the shingles from UV exposure. Another huge advantage of these coatings is that they can withstand huge temperature variations without deteriorating.

On the down side, white reflective coatings have low tensile strength, meaning that they are susceptible to erosion from ponding water. However, white acrylic coatings are generally a great addition if you are looking to improving the energy efficiency and aesthetic appeal of your asphalt roof at an affordable cost.

Polyurethane roof coatings

These coatings are becoming increasingly popular in the market, mainly because of their ability to reflect heat from roof surfaces and resist damage from ponding water. Urethanes have very low heat retention coupled with high reflectivity, which makes them perfect for cooling roofing in hot climate areas.

Unlike acrylic coatings that are susceptible to erosion by ponding water, polyurethane coatings have higher tensile strength and can better resist expansion and contraction resulting from drastic temperature variations, as well as stand up to water erosion.

Urethanes are also better suited for coating rough asphalt surfaces, as they are composed of a mixture of asphalt-like resins and aluminum flakes that rise to the surface of the roof, creating a sturdy, reflective surface that dispels heat and UV rays.

The only downside to polyurethane coatings is that aromatic formulations tend to chalk when exposed to strong UV rays over extended periods. The best way around this is to insist on aliphatic urethane formulations that do not degrade in intense UV light. Talk to a roofing company like Allen Roofing & Construction Inc for more information. 


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making decisions about roof replacements

Is the roof on your home ready for replacement? If so, do you know what type of roofing you are going to have installed to replace it? Will you have the existing roof removed, or just have the home re-roofed? You will face several decisions while you work to replace the roof on your home. Scroll through my site to find a great list that can help you decide what product and method of installation will be best for your home. Hopefully, the information provided will take some of the confusion and stress out of this big, important home improvement project.