Roof Coatings

A roof coating is a monolithic (single piece), fully-adhered roofing membrane that is applied as a fluid before drying into a solid, rubbery film. The coating has elastic properties that allow it to stretch and return to its original shape without damage.

When dry, a roof coating’s thickness can vary anywhere from the thickness of a paint layer at around 3 dry mils (thousandths of an inch) to more than 40 dry mils (slightly thicker than a credit card). The roof coating will sit as the outermost layer of a roof membrane and its underlying roofing system. This position means that the roof coating acts as the first line of defense against sunlight, rain, hail or other types of physical damage.

Installing a roof coating can add 25 years to the service life of a roof and reduce the amount of discarded roofing materials that ends up in landfills.

Benefits of a Roof Coating

Field-applied reflective roof coatings can extend the useful life of nearly every roofing type. They keep the roof surface cool and provide a wide level of protection from the sun and weather.

Field studies have consistently shown that cool roof coatings can lower rooftop temperatures and reduce air conditioning bills. A white reflective roof coating can reduce the temperature of a roof by around 96 °F.

Roof coatings are also seamless when installed correctly, sealing out moisture and solving leak problems for nearly any type of roofing material.

Roof Coatings should not be confused with deck coatings. Deck coatings are traffic bearing, which means that they are designed for waterproofing areas where pedestrian (and in some cases, vehicular) traffic is expected. Roof coatings will only waterproof the roofing material, but they will not withstand any kind of ongoing use by people or vehicles like you would see on walkways, patios, sundecks and similar structures.

Possible Limitations

Roof coatings are not perfect for every roof type. Asphalt shingles in particular are known to have moisture issues after application of roof coatings. The coating can prevent the shingles from drying normally after being exposed to humidity or rain. This effect may lead water to condense and remain underneath the shingles.

Another potential problem with roof coatings stems from their use on flat roofs. A flat roof may not be perfectly sloped, causing rainwater to form puddles in some areas. These puddles often form around roof drains and scuppers. The formation of long-standing puddles is often referred to as “ponding” by roofing material manufacturers and contractors.

Many roof coatings are not rated or warranted to handle ponding. They might fail prematurely if exposed to standing water over an extended period of time.

Serious consideration should be given to the performance and limitations of the coating type and brand being selected. Some manufacturers’ roof coating warranties will include ponding water. Typically, manufacturers for acrylic roof coatings do not include warranties for ponding water, while some polyurethane roof coatings manufacturers will.

Nashville Roof Coating Installation Experts

Roof coatings are an excellent option for anyone who wants to extend the life of their roof or prevent problems related to leaking and overheating. When looking to install a roof coating, Nashville residents often turn to an experienced contractor to advise their decision and install the materials correctly.

Antebellum Roofworks Co Inc offers expert service and advice for any roofing needs. We can install a roof coating on both commercial and residential sites. Contact us at (615) 794-9111 today or fill out our form for a free job quote or to get started.

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