Common Mistakes

Mistakes we see every week.

Real installation mistakes from real roofs — most made by generalists who don't specialize in metal.

#01Mistake

Exposed fasteners through the panel flat

Screws driven through the flat of a standing seam pan guarantee leaks as gaskets age. Panels must be attached with concealed clips.

Field photo coming

#02Mistake

Caulk instead of flashing

Sealant smeared over a bad joint is a 2-year bandage on a 50-year roof. Every transition needs real step and counter flashing.

Field photo coming

#03Mistake

Mixed metals

Copper wire, lead boots, or steel screws on aluminum trim create galvanic corrosion that eats the roof from the inside out.

Field photo coming

#04Mistake

No underlayment

"Metal doesn't leak" is how condensation and wind-driven snow end up on your ceiling. Ice-and-water shield and synthetic underlayment are non-negotiable.

Field photo coming

#05Mistake

Face-screwed ridge caps

A ridge cap screwed down through its face can't vent and will leak. Ridge assemblies need cleats, closures, and ventilation.

Field photo coming

#06Mistake

No hem at eaves and rakes

Panel edges left un-hemmed rely on gravity and luck. Wind uplift peels them like a can lid. Edges must be hem-locked over cleated trim.

Field photo coming

#07Mistake

Botched valleys

Valleys carry the most water on the roof. Lapped panels, no ice-and-water membrane, or trapped debris turn them into the first failure point.

Field photo coming

#08Mistake

Cheap pipe boots

Standard rubber boots cook and crack in Arizona sun within years. Penetrations need high-temp silicone boots or soldered metal flashings.

Field photo coming

#09Mistake

Wrong clip spacing

Clips set too far apart let panels flutter and oil-can; too tight and panels can't expand and contract. Spacing must match panel gauge, span, and wind zone.

Field photo coming