Metal Roof Leaking? Here’s the Reason Why, and How to Fix It

To prevent leaks, it’s vital that your metal roof is installed properly.
To prevent leaks, it’s vital that your metal roof is installed properly.

Even though a metal roof has a lot of pros over other roofing materials, due to its weather resistance and extreme durability, homeowners sometimes call us asking why their metal roof could possibly be leaking. A metal roof should last between 40 to 70 years when properly installed, but a leaking metal roof could be the result of mistakes made during installation.

This is what can go wrong, and how our team at Four Seasons Roofing can put it right.

Roofing Screws

Roofing screws, used when installing metal roofs, have a rubber washer at the screw head base which forms a seal between the roofing panel and the screw. Though it’s a simple design it does an excellent job keeping water from entering your metal roof, provided it is done right.

A detailed visual inspection by a roofing expert is the only way to identify leaking roofing screws. It is a good idea to have your roofing screws checked every few years because they can pull out over time due to wind, vibrations and roof shifting.

Stack Flashings

Stack flashings are typically made of rubberized material forming a seal around a pipe or vent. They have a lifespan which is less than half that of the roof. Due to the metal roof expanding and contracting in the heat, over time a lot of strain is placed on stack flashings. The best option, once they fail, is to have them replaced by a qualified roofing expert.


The problem with sealants is that they are not as long-lasting as the metal roof and need to be replaced from time to time. Part of the regular routine maintenance should include checking the sealant.

Seams and Overlaps

When your roof is first installed, it is crucial that overlapping panels are properly sealed. To prevent any leaking at the seams, we apply sealant or butyl tape to seal joints and overlaps. Because, over time, roof panels can shift and move, we recommend a regular inspection to make sure they haven’t moved and are still sealed.

To fix leaks in a metal roof you first need to identify the underlying cause. Our team at Four Seasons Roofing are roofing experts with years of experience. From our locations in Bellevue, Snohomish, and Everett, we are here to help in any way we can. Learn more about finding a metal roof leak, and how to fix it, by contacting us today.