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Fasteners play a significant role in how a standing seam metal roof will perform, as fasteners are the main anchor points for the metal panels to stay attached to the roof deck.

Metal roof panels can be installed with exposed or concealed fastener screws.

About
Concealed Fastener

Also called “standing seam,” has no exposed screws, making them the most weathertight and maintenance-free system. Standing seam is a good choice for commercial and high-end residential projects but requires higher-skilled craftsmen and more labor costs for installation. But it looks great and works very well.

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Exposed Fastener

You want to make sure that all exposed fasteners are long-life; it will make all the difference in the performance and lifespan of your metal roof. Exposed-fastener panels are typically 26 to 29 gauge, compared to the heavier 22 to 26 gauge used in standing-seam roofing. A specifically designed fastener with a sealing washer to fasten through the panels. These panels require less labor for installation and are economical for many residential and some light commercial projects.