Common Triggers and Aggravating Factors While the physical properties of the metal are the primary cause, certain external factors can make oil canning more pronounced. When the panel is installed and subjected to temperature fluctuations, thermal expansion causes the metal to expand and contract lengthwise.
Homeowner Oil Canning Metal Roof Guide: Understanding Triggers and Fixes
Mitigation Strategies for Installation. The movement is not the metal bending permanently but rather a elastic deformation of the material along the flat span between the raised seams.
This subtle waviness or shimmering effect across the flat seams of the metal panels can resemble the surface of an oil can. When to Consult a Professional If the waviness appears suddenly or is accompanied by other symptoms, such as leaks or excessive flexing, it is prudent to consult a roofing professional.
Homeowner Oil Canning Metal Roof Guide: Understanding Triggers and Fixes
This effect is most noticeable on light-colored surfaces and under specific lighting conditions, such as direct sunlight or when viewed from a particular angle. Rapid and extreme changes in temperature, for instance, increase the stress on the panel as it constantly expands and contracts.
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