8 Most Common Silicone Roof Coating Problems


Although silicone roof coatings are a smart choice for many reasons, silicone roofing problems are quite common.

On the bright side, silicone coatings possess very high solids content, so they don’t necessarily have to be applied in multiple layers to provide adequate protection.

This saves time and money, and even more so when they do not require a primer (which is often true).


Many commercial buildings have silicone coatings protecting their roofs for these and other reasons. However, silicone roof coatings are not perfect—no type of roof coating is. They have inherent flaws.

As a contractor, property manager, or business owner, you should be aware of how silicone roof coatings can fail and thoroughly understand their most common problems. 


Silicone Roof Coating Problems

Common Silicone Roofing Problems

  • Incompatibility With Other Materials
  • Adverse to Foot Traffic
  • Compromised Reflectivity
  • Limited to Flat Roofs
  • Shorter Warranties
  • Vulnerability to tearing
  • More Expensive
  • Difficult installation

Below, Roofer’s Guild outlines eight silicone roofing problems to consider:


1) Not All Roof Materials Adhere to Silicone

When it comes to selecting the best roof coating, you must consider your circumstances. Right off the bat, this could be a big problem. Not all existing roof materials will adhere to silicone.

A lack of adhesion means you must remove the entire surface or opt for materials that will stick to silicone. Investing in adhesive materials can drive up your installation costs. 


2) Not The Best for Heavy Foot Traffic

An ideal candidate for silicone roof coating is a roof that will not see much foot traffic. There are a couple of problems that can arise if a silicone roof coating is applied to a roof that gets a lot of foot traffic:


  • Silicone becomes more slippery than other roof coatings when it gets wet, presenting a safety hazard for people on your roof.
  • Frequent foot traffic can damage silicone, reducing its projected lifespan.

Foot traffic may not be an issue if your building’s roof rarely receives visitors. However, if you frequently need roof-top HVAC maintenance, have people working on skylights, or your roof requires a lot of care, this may be a problem. 


3) Compromised Reflectivity

One of the main advantages of installing a silicone roof coating is that it can reflect a lot of UV light, saving you money on cooling costs.

However, this is not an infallible advantage. Silicone roof coatings attract dirt and dust more than other materials. Dirt and other build-ups will compromise its reflectivity and negate energy savings. 

While investing in regular roof cleanings can negate many of these concerns, doing so adds more maintenance to your property.


4) Limited to Flat Roofs

A silicone roof coating will not work very well on pitched roofs. Very few homeowners are clamoring to install a silicone roof coating on their houses, but not all commercial roofs are flat.

Silicone will not hold up or perform as well as other roof coating systems if you have a pitched commercial roof. 


5) Shorter Warranties

While some other types of roof coatings typically come with warranties that last up to 25 years, the warranty you are likely to get from a silicone roof coating is significantly shorter.

You can usually expect a warranty period of only ten years. While some manufacturers/contractors may offer you 15-year warranties for silicone roof coatings, you can also expect to pay more for them. 


6) Prone to Tearing

Silicone roof coatings are inherently prone to tearing. They are not as durable as some other roof coatings and should not be installed in areas where hail, foot traffic, and abrasion are common.

Hail and debris whipped up by the wind could tear the coating and expose the substrate. When a tear occurs, the entire coating can become compromised. 

Tears can occur in many ways, including hailstones, heavy tools hitting the surface, pest infestations, falling debris from trees, and more. 


7) More Expensive

One of the most unattractive silicone roof coating problems is that it is typically more expensive to install than other materials.

For example, installing a silicone roof coating costs around $2 to $3.50 per square foot. On the other hand, the average price to install an acrylic roof coating is only about fifty cents to a dollar per square foot. 

Silicone roof coatings are also more expensive than other coating options because they require more cleaning and are more prone to tears.


When it comes time to replace your silicone roof coating, you are likely to pay more because, depending on the replacement materials, the entire surface may have to be removed.


8) Difficult to Install

Many roofers dislike working with silicone because it is messy and difficult to apply correctly. As a result, most contractors offering silicone coating installation have undergone special training, which will again drive up the installation cost. 

On the other hand, an inexperienced contractor installing a silicone roof coating could cause more problems. That’s because improperly installed silicone roof coatings can damage your roof. 


Making Sense of Silicone Roofing Problems

Vetting the problems of any roofing material will yield concerns. The goal is not to dissuade you from choosing silicone as your next roofing material but to equip you with the knowledge to make a more informed decision.

While we’ve clearly outlined potential problems with this popular material, it’s worth noting that its popularity is based on many positive attributes.

Ultimately, your choice of silicone roofing will likely be positive for your property.

Nevertheless, gaining awareness of silicone roofing problems is essential before investing time and money.