What Are The Pros and Cons of Silicone Roof Coatings?

Contractors applying silicone roof coating

A wide range of roof coatings are typically used on commercial roofing. Many commercial building owners decide to add a new coating when the roof is nearing the end of its warranty. This is because a new coating secures your roof for ten or more years if the roof is not too damaged. This helps you get an extension in the roof warranty without the need to fully replace it.

When it comes to roof coatings, you have plenty of options to choose from. Commercial roofs typically use acrylic, polyurethane, or silicone coatings. Silicone coatings, in particular, offer a wide range of benefits. However, such a coating also comes with some downsides. Here is a look at both aspects.

A Look at Silicone Roof Coating

The silicone roof coating comprises a single layer of silicone. This layer is applied on top of the existing roof structure. The new layer protects the underlying roof from weather-related damage.

Two different types of installation methods are typically used to install silicone roof coatings. The silicone is either applied onto the roof using a roller, or it is sprayed as a top layer. Both methods achieve desirable results.

However, a roof must first be suitably prepared before silicone roof coating can be applied. Prepping the roof includes removing any contaminants, making sure the insulation is in good shape, and applying a primer before the silicone is sprayed or roller-applied.

Pros of Applying a Silicone Roof Coating

Applying a silicone roof coating offers a number of stand-out advantages. These include:

Roof Warranty Extension

This is a key benefit of adding silicone roof coating to a commercial roof. If the roof’s warranty is nearing an end, the new coating will make it eligible for another 10-year, 15-year, or even a 20-year warranty. For commercial facilities, this is a very convenient option as this means that you are saved the hassle of removing the old roof and adding a new one.


Another notable advantage of a silicone roof coating is that it is cost-effective, especially when full roof replacement is your other option. Silicone roof coating costs around $1.50 to $4 per square foot. This is in contrast to a full roof replacement which can cost significantly more.

Weather Proofing

A silicone coating can withstand water very effectively. This makes it particularly suited to withstand weather elements like rain, hail, and snow. Being a spray-on liquid application, silicone is also applied very thoroughly so that it fills all the seams, cracks, and holes on a roof. This adds to its weather-proofing abilities.

Energy Efficiency

Silicone roof coatings have a white color which allows them to reflect heat and sunlight away from the rooftop. This helps a roof stay cool, improving the overall energy efficiency of a building.

Quick and Easy Installation

Many commercial facilities simply can’t spare the time needed to remove an old roof and have a new one installed in its place. Silicone roof coating is an excellent alternative in that it effectively seals the roof and extends its warranty without the need for a replacement. And the best part is that the application of the coating is quick and easy, particularly suited to commercial buildings.

Cons of Silicone Roof Coatings

There are some drawbacks to a silicone roof coating. These include:

Hard to Adhere

It is hard to adhere to silicone. This means that if you ever want to have a new coating or material installed on the roofing, you will first need to have the silicone layer removed completely. This can increase roof replacement costs.

Not All Roofs Qualify

Being eligible for a new warranty by applying the coating is what makes silicone roof coating a very attractive option. However, not all roofs can qualify for a warranty. A roof must have been properly maintained with little to no damage to the seams and being less than 25% saturated in order to be eligible. This means that only such commercial roofs which are in a good shape can use silicone coating as a viable option.

Silicone Loses Reflectivity

The silicone coating gathers up dirt and dust over time. The rainwater can wash away these accumulated layers but the silicone coating still ends up losing its reflective properties. This can diminish the energy-efficiency benefits offered by the coating.

Slippery Surface

Silicone has a slippery surface which makes it a very effective waterproof material. However, this also means that any personnel or equipment on the rooftop has an added risk of slippage. For personnel working on the rooftop, the risk of injuries is increased with a silicone coating.

Get Estimates for Roof Coatings in Woodstock, GA

Roof coatings can offer a wide range of benefits, especially for commercial roofing. If you want to see whether your commercial roofing is suitable for a silicone coating, or if you are looking for an estimate of what it would cost you, we can help you. Here at Sentinel Exteriors, we are the go-to roofing contractor for both residential and commercial roofing projects in Woodstock, GA. Message us today for a free estimate.


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