Three Causes Of Metal Roof Leakage

Metal roofs look stylish, add a touch of elegance to the exterior, and increase the overall value of a property. They have the added benefit of being lightweight, strong, and durable. Thus, investing in a metal roof is said to be one of the best investments you can make to boost your property’s curb appeal. That said, there are also some weaknesses in metal roofs, and one of them is they are prone to leakage.

In this blog, we will shed light on three primary causes of metal roof leakage.

  • Metal Roofing Screws

Roofing screws are indispensable to your roof. They provide your roof with a safeguard against various vulnerabilities. But, at the same time, they are a major cause of roof leakage. There is a rubber washer used with the screws while driving the screws into the metal roofing. The screw compresses the rubber washers and creates a gasket between the screw head and roofing panel. Several mistakes like over-driving, under-driving, driving screws in the wrong angle, or driving screws missing the framing lead to leakage. However, it would be wrong to blame screws only. The rubber washer is vulnerable to extreme weather conditions. Over time, the rubber washers can get damaged and provide cracks for water to seep through.

  • Stack Flashings

Stack flashings are the rubbers or rubberized materials used to create seals between the metal roof and HVAC vents, air vents, and plumbing pipes to avoid the probability of leakage. The area around the stack flashings is always vulnerable to leaks. The flashings are squeezed around the pipes to make another seal. Interestingly, these seals are often tested by the movement caused by the contraction and expansion in the metal roofing that may cause a gap that leads to leakage.

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  • Seams And Overlaps

The seams or ridges where two metal panels overlap each other are prone to leakages because of the capillary draw, a given name to space between two metal roofing panels. The capillary draw provides space for water to get in.
These were just three out of many causes of metal roof leakage. Having your roof inspected once a year by an expert in roof repair Surrey will help you prevent metal roof problems and increase the life of your roof.