Heavy, Wet Snow on Roofs: What You Need to Know

Installed Snow Guards

Heavy, Wet Snow on Roofs: What You Need To Know

Winter is here and Spring is around the corner and with its arrival comes greater chances of heavy, wet snow. While a blanket of snow may look picturesque, it can cause serious damage to your home or bodily harm.

Why is heavy, wet snow dangerous for roofs?

The weight of heavy, wet snow is the biggest concern for roofs. As the snow accumulates on your roof, the weight can build up quickly. In the Spring when the snow is wet and heavy, it can put a lot of stress on your roof structure. This can cause the roof line to sag or even collapse. which is a serious safety hazard and will cause costly repairs.

In addition, heavy, wet snow can cause damage to your gutters, shingles, and other roofing materials. When snow melts, it can seep into cracks and crevices, causing water damage to your roof and even making its way into your home. This is what we refer to in roofing as ice dams. Ice damming occurs when snow on the roof melts and refreezes at the edge of the roof. This can cause water to back up and seep into the home through the roof or soffits, leading to water damage. For more about preventing ice dams check out our Ice Dams blog: https://www.excelroofing.com/ice-dams-how-to-prevent-ice-dams-protect-your-roof/


Heavy, wet snow is not only dangerous for your homes’ health, but also your personal health. Every year people die or are severely injured from snow falling off roofs. Metal roofs are particularly dangerous. Heavy, wet snow easily slides off metal roofs due to no friction between the roof and the snow. Snow guards are highly recommended by Excel Roofing for metal roofs in areas that receive a lot of snow.

What can you do to prevent heavy, wet snow damage to your roof?

  1. Clearing snow off your roof can help reduce the risk of damage. You can use a snow rake to remove snow from your roof or hire Excel Roofing to do the job for you. Excel Roofing does not recommend getting on your roof with snow or ice present.
  2. Snow guards are most common for tile, metal, and composite roofs but can be installed on steep asphalt roofs. The guards are installed to create friction and keep the snow on your roof until is safely melts. Heat cable is installed on all roof types. The heat cable will melt the snow and ice where it builds up which reduces strain on the roof structure.

  1. Regular roof maintenance, such as cleaning gutters and checking for damage, can prevent ice dams from forming and mitigate future damage. This is especially important if you live in an area that gets a lot of snow. Keep an eye out for any signs of sagging or cracking and act immediately if you notice any problems. Click HERE for a free roof inspection.

By taking these steps, you can help keep your roof in top condition and protect your home from heavy, wet snow damage. Call Excel Roofing for any roofing questions and concerns. 303.761.6400

A Flat Roof Case Study

finished gaco roof coating

A Flat Roof Case Study

A long-time local business owner, and previous customer of Excel Roofing, was in need of a roof estimate for his commercial property in Denver. He received bids from two other roofing companies, but wanted another opinion. He started working with Glenn Summerlin, Excel Roofing’s flat roof expert, who inspected the roof and provided the customer with 3 options: 2 estimates for full reroofing projects and 1 estimate for a GACO Silicone Coating.

The customer had not been advised of this third option by either of the other companies, so Glenn explained that it was an alternative to replacing the roof. Instead of tearing off and replacing the flat roof, the roof would undergo a process of being thoroughly cleaned and resealed with the durable and seamless GACO Silicone Coating.


  • The GACO Silicone Coating extends the life of the roof, instead of having to do a full roof replacement.
  • The reroofing options would have cost the customer about $25,000. The GACO option only cost $12,900, almost a 50% savings.
  • Applying the roof coating saves time and waste. This project only took three days to complete, and with no tear off, there’s very little waste to this job.
  • 10-year leak guarantee 
gaco roof coating finished product


Because Excel Roofing is a certified GACO applicator, we were able to offer the customer a 10-year leak guarantee for a nominal fee.

A 50-year manufacturer material defect warranty also came with this installation, meaning that in the next 50 years (if any of us are still around) the manufacturer will provide prorated compensation if the material fails.


It’s important to note that this customer’s roof was a perfect candidate for a GACO coating. GACO roof coatings can only be applied to TPO (plastic), EPDM (rubber), modified roofs, and metal roofs.  As has happened in the past, the other companies didn’t offer a roof coating option to the customer; an option that gives customers almost 50% savings over the reroofing option.

We’re glad we were able to provide this customer with a different solution to his roofing needs.

In addition to the savings, the installation of the coating system only takes about three days to complete; about half of the time of a full roof replacement. This time savings means less disruption to the owner and his business.


Applying a roof coating isn’t as easy as going to Home Depot, buying a bucket of coating and slapping it on.

gaco roof coating in progress

In order for the coating to be properly installed, the old roof needs to be thoroughly cleaned, and all the seams need to be thoroughly checked. If any seams are found that aren’t 100% bonded, they need to be re-bonded before the GACO coating is applied.

After this is done, the entire roof area needs to be primed. Only then is the final roof coating ready to be applied. If these steps aren’t carefully followed, the system can fail.

To learn more about roof coatings and flat roof options, call Excel Roofing today.

Click here to read more about flat roofs.

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