Metal Roof Damages: Causes And Repair Options

A metal roof is resistant to a lot of damages, but over time, age and weather exposure can lead to problems on even the sturdiest of metal roofs. Learn the main culprits of metal roof damage and how to reverse the damage.

Aging Damages

Aging is one of the main reasons for metal roof failure. Although metal is extremely durable, an aging roof may begin to develop small damages like rust, corrosion, or small holes. This increases the likelihood of a roof leak. If aging is ignored, the damages may eventually become so severe that the roof can't be restored.

Further, the fasteners may begin to break or back out, leading to empty fastener holes and loose panels, which will also be more prone to leakage. Any seam sealers that have been applied over the panel seams can begin to fail as they also age.

Weathering Problems

Weathering exacerbates the aging process so that damages may appear even earlier in a metal roof's lifespan. Heat from the sun and UV radiation can cause sealants and metal roof coatings to break down more quickly, while frequent moisture exposure can increase the chances of rust and corrosion.

Thermal cycling is also a major problem faced by metal roofs. The thermal cycling process is when metal roofs experience movement due to the natural expansion and contraction of both the panels and the underlying roof structure due to external temperature fluctuations. This expansion can cause fasteners to pop out, panels to separate, and the metal to warp. The larger the roof, the more extensive the possible damages.

Restoration Solutions

Fortunately, the above issues don't mean you must replace the roof. Metal roof restoration can fix both aging and weathering problems. Restoration begins with removing any fasteners that have become damaged, and then replacing the missing and damaged fasteners with new ones. Old peeling sealants and flashing may also need to be removed or replaced. 

An acrylic coating is then applied over the entire surface of the roof. This thick coating is resistant to moisture and UV radiation so it protects the roof from any further damages. The coating also seals up any minor existing damage so that it won't pose a problem anymore. You can opt for a clear coating to allow the color of the roof to show or a reflective white coating that will further prevent UV damage and result in a cooler roof surface. 

Contact a roofing service to learn more about metal roof restoration systems