There are 3 different type of Metal Building Roof Systems for your Steel Building
Screw Down Metal Building Roof with ZAC Lifetime Fasteners
Screw down 26 gauge PBR panel roof , installed correctly, is least expensive. Screw down roof systems come in either bare galvalume or a variety of colors and last for years if properly taken care of. Most mini storage buildings with screw down roof system come with a ZAC lifetime fastener that penetrate thru the roofing panel and fasten into the purlins and are sealed with mastic tape between the panels and at the eves.
Ultra Deck with Snap Lock Standing Seam
Ultra deck snap lock standing is a type roof systems with no fasteners and is usually as 24 gauge color or galvalume . There is no penetration of fasteners in the system as it is usually snap locked onto the purlins and if cared for properly will last the lift time of the building, is less likely to ever leak but cost is generally double that of screw down system
Standing Seam with Seamer
Standing seam done with Seamer is the most expensive because of labor to install and rental of seamer generally provided by the metal building supplier.
Standing seam metal roofing is a seamed metal panel roofing system that features a variety of options for fastening flat metal panels for a metal roof. Standing seam based systems can be used metal roofing, which is the most common, or metal walls.
The main element to know for standing seam systems is that the fastener is hidden, whether the panel is attached to the roof deck using a clip or is directly fastened to the decking material under the vertical leg using a fastener flange.
In summary, all roof systems, for metal buildings, installed correctly will last the lifetime of the building and have no leaks provided the roof is maintained properly.
