Lap Seam Metal Roof

Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line.

Lap seam metal roof.

Many details in a standing seam metal roof have folds or hemmed edges that conceal the cut edge of the metal. Standing seam metal roofing is a concealed fastener roofing system which features vertical or trapezoidal legs with a flat space in between. This is ideal for lapping because the sealant stays sticky rather than hardening. Capped on seam also known as the circular lap seam the capped on seam is created by laying a flat round piece of metal over a smaller rounded piece such as the base of a cylinder.

Review the manufacturer instructions that accompany your metal roofing materials to verify the proper type of sealant that you should use. Metal sealing and fastening apply side lap sealant if the pitch of your roof is 2 12 or less. The edges and ends of overlapping metal roofing panels are sealed with a butyl adhesive tape or other sealants. Install the roofing screws vertically along each rib in the panel.

Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Most metal panel seams will use a butyl type sealant. Out of all the metal roofing types standing seam is becoming more and more popular as property owners look for products that last a long time look modern and protect their structure. 4 apply a generous bead of waterproof roof caulk to both edges of every 6 inch wide.

Hi i had 12 inch wide metal panels with a 1 5 inch raised seam that clicks together installed on my newly constructed house this summer. A contractor can minimize the appearance of edge creep by using lap flashing hemming exposed edges when possible or using a paint pen on visible cut edges. Its concealed fastener design ensures that the fasteners aren t exposed to the elements which could cause them to fail over time. This metal roofing system from mbci is one of the most durable and weather tight roof systems available in the industry.

Lap seam metal roofing systems typically consist of a 22 26 gauge corrugated or flat metal panel that is formed in a factory or on site and installed with or without insulation batts directly to structural purlins. In other words if the height of the roof drops by 2 inches for every 12 inches in length you will need to use sealant to strengthen the overlap barrier. The maximum length panels that they could get to the site was about 30 feet long so they needed to overlap the 13 runs. When someone references metal roofing he or she could be talking about shingles or tiles made of metal an exposed fastener roofing system that is common for agriculture buildings or maybe even a standing seam metal roofing system.

My roof has a 13 panel wide section that has a 54 foot straight run.