What's most important about the fasteners used is how they're affected by the normal expansion and contraction of the metal roof during temperature fluctuations. If the roof system doesn't properly accommodate this expansion/contraction, whether the fasteners are exposed or concealed or nails/screws, the fasteners will loosen at best and tear the metal roof at the worst, over time. Either of those events, loosening or tearing, can and most likely will cause roof leaks. The ideal system should direct expansion and contraction away from the fastener...
Guest User
2012-04-13 13:43:40.000000
Hi Tom. The variety of available products, to me, is part of the beauty of metal roofing. Even beyond just the fasteners, there will be different "looks" achievable between these two general types of metal roofing. Also, most folks will express a belief that the holes required by exposed fasteners create areas of potential decline in service life of the roof over time.
Todd Miller
2012-04-10 05:23:01.000000
I understand that there are 2 basic fastening methods for homes...exposed and consealed. Aside from the appearance are there any other differances ?
Thanks Tom
Tom Martin
2012-04-09 22:07:44.000000
What's most important about the fasteners is how they'll react to normal expansion and contraction of the metal used to roof. Whether the fasteners are exposed or concealed they must be part of a system which allows for expansion/contraction otherwise the
Doug Chuhran
2012-04-13 13:31:34.000000
+1
There are a ton of different metal options out there.
Once you look at the premium family of products, the larger differentiators become the aesthetics for most people.
Eric Novotny
2012-04-10 07:38:38.000000
Doug,
While agree with everything you have said, the issue with most exposed fastener systems is that they are reliant on a gasket that can fail.
Making your roof system's water tightness dependent on a small gasket that is going to be beat up by the sun, subject to installation tolerances and over torquing, potential material defect, and other issues is not a preferable option when there are completely hidden fastener options.
Any roof system is only as good as its installation, but the more stuff I can engineer out of the failure equation, the better.
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