The pros and cons of different roof coating types


A roof coating can reduce your maintenance costs by shielding your roof against the environment. Hence, it can block out harmful UV radiation, limit your roof’s heating and cooling cycles, and prevent water gathering on your roof. Here are the pros and cons to some of the major coatings, brought to you by Reilly Roofing and Gutters, a residential roofing contractor in San Antonio, TX:


Roof coatings


Silicone roof coatings


Boasting of a long history, they are cost effective. They are moisture cured, do not need a primer coat before applying and stand up to the weather. They do not get hard or brittle when exposed to weather, are erosion-resistant and solve water pounding on your roof. They are easy to apply to existing roofing materials, typically with a paint roller, and relatively inexpensive.
They tear easily, which means you must use them with fabric to last and collect dirt, meaning they will lose some of the reflective properties with time.



Acrylic roof coatings


They are water based, versatile – offer a wide variety of protection on any roof in any climate – making them very cost effective. They are UV radiation-resistant and highly reflective.
They should be applied at a temperature of 50 degrees (F) or higher. They will also lose thickness over time (called mil thickness), which means they will need additional coatings and are poor with water ponding.


Standard roof coating application issues to avoid


Thin coat


If you apply a very thin roof coating, it will not be effective in protecting your roof because a portion of the water or solvent in the roof coating evaporates while the coating application is drying. To give your roof a good layer, you should add additional wet mils during application to the roof to compensate for the mils that will evaporate during set up.


Thick coat


If you apply a very thick coat, your roof will develop blisters, bubbles, and wrinkles. The coating beneath the surface does not have enough time to dry before the surface dries, trapping water and other chemicals.




Failure to mix your roof coating properly will give you a rough coat. Always stir your roof coating thoroughly to prevent its heavier ingredients settling at the bottom of the container.




Apply your coat during the ideal weather conditions, for instance, avoiding any works just before storms or during too cold or too hot weather conditions. This is because storms may interfere with the surface or wash the roof coating away. Alternatively, apply roof coating that set quickly. If you need more tips, feel free to contact Reilly Roofing and Gutters, the top roofing contractor in San Antonio, Texas.


A word of advice for the end


While roof coating seems like a solid solution, keep in mind not to spoil your house’s style.  When choosing a roof color you should consider the statement you want your house to make, since roof is the first thing someone is going to see when looking at your home. By choosing a neutral color, you are playing it safe and actually doing yourself a favor if you ever decide to sell your house. Of course you can go for something more trendier as well by mixing palate of blue, brown, black and grays but if you decide to go for this style, make sure to consult a roofing expert and your neighbors.


It’s a good idea to try coordinate your roof color with the colors of other elements of your house, like bricks, siding or stone. If you want a traditional look, choose a black or dark gray on a white house. If you have a red, yellow or green painted house, you are given more options when it comes to shingle color such as brown, black or gray.

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