Newlok® snap-lock or seemed roofing panels are now available through Safintra South Africa.
Newlok® brings complete standing seam metal roofing flexibility – in one small dynamo package.
Safintra South Africa is offering the roofing industry complete flexibility in selecting snap-lock or seamed roofing panels, both made on one flexible roll former. The size of a large domestic trailer, the NewLok machine can roll a snap-lock concealed fix profile or a snap-and-seam option for high wind load areas.
The Newlok® system.
Made by New Tech Machinery in the United States, a world leader in manufacturing portable roll-forming equipment, it is fully supported by product performance tests and an easy-to-follow installation guide.
With added seam strength due to the snap-lock design, Newlok® is ideal for both residential and industrial applications. The neat roll former measures 5,3m long by 2,1m wide and only weighs 2,2 tons, so it can be hoisted to the roof height or fit into a tight building site.
Standing seam and PV panels – the perfect marriage
Whether snapped or seamed together, the standing rib provides the perfect attachment substrate for above-roof installations such as solar PV panels, HVAC units, piping and more.
Top-quality clamps, such as the S-5® range, may be attached to the ribs without penetrating the roof sheet, thus preserving metal material warranties, as well as installation warranties on water-tightness.
Safintra has been one of the leaders in metal roofing and cladding systems for over 20 years.
Safintra South Africa
Tel: 011 323 6300
Website: www.safintra.co.za and www.safintra.com
What does standing seam mean?
Both standing rib and standing seam are in a category of profiled metal sheeting where the side laps or joining edges of the sheets stand noticeably proud of the pan of the sheet. They form distinctive vertical lines running down the roof from the ridge to the eave.
This is in contrast to trapezoidal or corrugated metal sheets, which simply overlap each other at the side joins to form an uninterrupted visual flow from one sheet to the next.
Standing seam sheets are joined using a concealed fixing device under the joint, which obviates the need for any piercing of the sheet to secure it. Typically, when these joins over the clips are locked or snapped over each other, it is a concealed fix system, with a standing rib, but when the joins are mechanically folded over each other during installation, the roof is seamed, hence the term “standing seam”.
In most parts of the world the term “standing seam” is used to describe both clipped and seamed concealed fix systems.
What are the benefits?
Standing seam roofs have no fasteners piercing the sheet, as they are secured using an under-sheet device. They are therefore completely water-tight at slopes as low as 2°.
Because the sheets are able to move over the concealed clips, the roof can accommodate thermal expansion of the sheet without shearing fasteners. They can therefore be rolled in continuous lengths up to 120m, and no end-laps are required. This also ensures that the roof surface is completely impervious to water ingress at end-joints, as there are none.
What’s more, seamed profiles typically have higher wind-uplift resistance than standing rib, because they are mechanically seamed over each other, and won’t disengage. In both cases, however, the wind-uplift is dependent on the strength of the clip attachment to the roofing substructure.