Common Metal Roofing Mistakes Made by Inexperienced Contractors

Metal roofs are sturdy by design. However, if their installation is poorly done, this can affect their quality, performance and longevity. Metal roof installation is usually a complicated process. That’s why it requires a trained and experienced professional.

Here are some common mistakes done by inexperienced contractors when installing metal roofs.

Incorrect Sealants

The seams of a metal roof must be sealed completely, and the panels must be lapped correctly. Failure to attach and seal the flashing properly will enable water to penetrate the roofing systems and the roof structure. In extreme cases, poorly installed flashing can cause some parts of the roof to blow off during a heavy windstorm.

Incorrect Fasteners and Clips

Overtightening or under-tightening fasteners, and placing fasteners off-center are just some of the errors commonly made by inexperienced roofers when installing fasteners. Any of these can result in metal roof leaks.

Also, it’s important to note that several metal roof systems have two-piece clips, which allow limited thermal expansion and contraction. Installing these clips in the wrong position can cause binding, sealant deterioration or oil canning.

Oil Canning

Oil canning is often described as waviness or buckling across the flat areas of sheet metal panels. As mentioned earlier, this is often caused by over- or under-tightening the roof fasteners – which results in the stretching, pulling and dimpling of the metal in various directions. Furthermore, an overtightened fastener can eventually pull down the cladding and create deformations.

To avoid these problems, ensure that your roofer has the expertise in installing metal roofs. Check their qualifications, and ask about metal roof installations they’ve done in the past.

Roof Masters has been in business since 1994. We have installed quality roofing systems for thousands of local homeowners, giving them peace of mind and security. Call us at (888) 889-7551, or fill out our contact form to request an estimate. We serve customers in Rockville, MD, and nearby areas.