Back to News

Metal Roof Damage: Top 5 Reasons

Metal roofs are durable, easy to install, and require little maintenance. But you still have to treat them right. Here are the Top 5 Reasons for Metal Roof Damage.

According to a recent article in The Global Dispatch, the five most common causes of metal roof damage are 1) rusting; 2) chimney or skylight leakage; 3) roof blow-off; 4) improperly driven screws; 5) and surface damage. Here’s what they had to say for each:

With the advanced technology used in coating and sealing the metal roofs, rusting is not a very common occurrence. But, no matter how effective the sealant used is at protecting the metal, over time, due to changing weather conditions which lead to the expansion and contraction of the metal, the sealant might wear off, leaving parts of the roof prone to rusting.

If rusting occurs, the best way to deal with it is to have it chemically treated first. Once that is done, you can then have it sealed. Do not be lax with rusting issues on your roof. If left untreated, it could quickly lead to bigger problems such as leaks and a roof that’s falling apart.

Chimney or Skylight Leakage
The article states that another problem area to watch out for is the part where the roof meets the chimney/skylight. Flashing is used to fortify the area and ensure that no leaks occur. But if the flashing was not installed well, it leaves the area open to water leaks. We’d add that Marco’s Weather-Tite™ Metal Roof Sealant is the ideal solution to repairing leaks. It stands up to the elements better than all other sealant technologies, adheres to almost any common building substrate or material, and provides a waterproof seal against water, wind, dust, dirt or other filtrations

Roof Blow-Off
Roof blow-off is a serious issue that is a result of poor installation. If flashing is not done properly, it could cause parts of the roof to blow off. And that is as terrible as it sounds. The best thing to do to avoid such a scenario is to ensure that your roof is installed by a reliable, experienced and trust-worthy roofing company.

Improperly Driven Screws
If you suspect a roof leak, the very first thing you should look for is improperly driven screws. How the screws are driven is crucial to how effectively the roof protects against water leaks. If the screws are over-driven, under-driven or crooked, you can be sure that it will lead to leaks at some point.

Over-driven screws facilitate bulging/tearing of the rubber washer. Under-driven screws aren’t tight enough to provide a water-proof seal. And crooked screws might not completely cover the rubber washer (which means they aren’t air-tight) making it more prone to leakage. When the washer is not utilized to its full capacity during installation, water leaks are a big probability in the future.

In addition to the information above quoted from The Global Dispatch article, you can check out our helpful illustration of proper-versus-improper fastener driving on page two of the Marco Fasteners brochure.

Surface Damage
A heavy tree branch falling, frequent foot traffic or extreme weather conditions could lead to roof damage. Keeping any nearby trees trimmed so they don’t hang over the roof, and reducing foot traffic on the roof (foot traffic on the roof should be only for maintenance purposes) can help avoid roof damage.

But when damage does occur to the roof’s surface, you will need to rope in the roof experts to get their expert opinion on how to repair it. Depending on the extent of the damage, they might suggest using a sealant to fix it or to completely replace the panel.

The key to reducing your risk of roof damage is to ensure that the roof is installed properly. Don’t just trust anyone with your roof. Do your research and hire roof installers with vast experience and great customer feedback.

The above is all good information from the article. It goes on to state that roof damage should be treated as an emergency and fixed as soon as possible by a professional with the right materials. We couldn’t agree more! Starting with proper installation and quality products from the Marco Weather-Tite System will help prolong your roof’s life and help prevent unnecessary roof damage.