Exposed fastener metal roofing is a roofing system where the panels are fastened to the structure through the face of the metal and directly into the roof deck or framing below. The panel edges lap one another, and the fastener goes through both layers of metal. It’s called “exposed fastener” because the head of the fastener is visible and not hidden by a seam.
One of the benefits of exposed fastener metal roofing is that it’s less expensive, especially when compared to standing seam systems. There are many reasons for the lower price, including:
- Wider panels (up to 36”)
Fewer metal panels need to be purchased. - Less labor is needed because the wider panels cover the roof faster.
- Thinner gauge panels
- Exposed fastener systems generally use 29 to 26 gauge metal, which is thinner and cheaper.
- Lower quality paint systems
(SMP) paint systems are popular choices for exposed fastener because they’re less expensive than the polyvinylidene fluoride (PVDF) paints typically used on standing seam systems.
- Less accessories purchase
Exposed fastener systems are directly fastened down to the structure through the metal, so there’s not a necessity to buy any kinds of clips. This can save on costs for the buyer. - Exposed fastener systems usually use less accessories and different flashing products, like foam closures, to install the roof system. Again, this cuts down on costs and speeds up the installation.
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