Corrugated metal roofing has been around for a long time, used extensively on commercial and industrial buildings. It was a relatively cheap, efficient solution for buildings that needed a long-lasting, somewhat maintenance-free covering. That being said, corrugated roofing is prone to leaking, rusting (although a paint finish will delay the rusting), and lifting. Leaks in a corrugated roof will likely occur at the lapped seams and at the fasteners. Lifting can occur because of the lighter-weight makeup of corrugated metal.With corrugated metal roofs, rubber washers are placed under the nails used to hold the corrugated panels to the roof. These washer become brittle and cracked as they age and must be replaced to prevent leaking.
Compare this to the standing seam roof. A standing seam roof has a raised seam which is above the drainage area of the roof. Concealed clips, as well as sealants, are applied to the standing seam panels. These clips secure the place of the panels, while allowing them to expand and contract according to the outside temperature as well as enabling them to resist strong winds. All of these standing seam roof characteristics ensure a virtually weather-tight roof!
Standing seam requires next to no maintenance, as it is resistant to cracking, shrinking, eroding, perforating, puncturing, rusting, and corroding.
So, while you may still feel that a corrugated metal roof is reasonable for your barn or shed, a standing seam metal roof is really the most attractive and intelligent choice for your home!