Why does my metal roof look wavy?

Oil canning in metal roofing is visible waviness, bulking, or rippling of the metal that affects flat surfaces of the roofs between the standing seams. This problem affects all metal panels, including copper, zinc, steel, and aluminum. The degree of the waviness tends to change under different lighting conditions.

What does oil canning mean on a metal roof?

Oil Canning Defined Oil canning is a visible, wavy distortion that affects cold-rolled metal products. Typically, the rippling, waviness, or buckling is especially seen in the broad area of a metal roof or wall. It can occur on all types of metal, including copper, aluminum, zinc, and steel.

What are metal roof striations?

Standing Seam metal roofing systems use hidden fasteners, meaning the hardware used to secure the panels to the substrate are hidden beneath the panels instead of exposed on top of them. Typically, standing seam panels are completely flat or striated, with the ridges or bumps being at the seams (or vertical legs).

Are metal roofs maintenance free?

Maintaining a metal roof is easy, as metal roofing is often referred to as maintenance-free. In most cases a metal roof would retain structural integrity, remain leak-free, and look good for at least the life of the product warranty (generally 20-30 years for quality material) even without any maintenance.

Is homeowners insurance cheaper with a metal roof?

A metal roof is more durable and damage resistant than shingles, and that translates into less risk for the insurance company to insure. Just as a brick or stone home is cheaper to insure than a wood home, a metal roof is cheaper than shingles.

Does a metal roof add value to your home?

Metal roofs are often touted as a good way to boost home value, but research indicates they are not as cost-effective as laminate shingles. The Remodeling Report for 2019 found that a metal roof, on average, cost homeowners $38,600 and increased home value by 60.9 percent.

Is metal roof more expensive than asphalt shingles?

Metal roofing is more expensive than asphalt shingle roofing materials. Usually, a good quality standing seam roof or a stone coated steel roof can cost around 2 1/2 to 3 1/2 times as much depending on how difficult the installation is and where it’s located.

Can a metal roof be installed over an existing roof?

Metal roofs can be installed over existing roofing materials. However, your roofing contractor must make sure that the roof beneath is in good condition. If the roof’s wooden structure is damaged, then you must fix it before you install metal sheets over it.

Can metal roof be installed over asphalt shingles?

Because metal roofs are so light yet so strong, metal roofing panels can typically be easily installed over asphalt roof shingles without the need to add structural reinforcement. The old asphalt roof shingles under the metal roof simply serve as an extra layer of insulation and water protection and pose no problems to the new metal roof.

Is slate a metal roof?

Technical Information. Matterhorn Slate metal roofing is authentically crafted, light-weight, fully recyclable, energy-efficient and forged in steel. Each panel is comprised of a carbon alloy steel core, with hot-dipped G90 Zinc Phosphate anti-corrosion coating, plus an exterior PVDF Paint System.