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With the NHBC encouraged to make BS 8612 compliant roofing dry verge systems compulsory for new builds sooner rather than later, Klober has put its Uni-Click and Contract dry verges through a range of tests to demonstrate how both comply with the standard.
BS 8612 Dry-fixed Ridge, Hip, Verge and Valley Systems for Slating and Tiling defines tests to determine mechanical resistance to wind load. It shows how specifiers should use data from these tests to verify whether a product is suitable or not, given the wind exposure of the location under consideration.
The standard also sets down a test for ridge-roll products to measure whether they can meet the profile of the roof tile at ridges and hips without breaking or splitting.
A third test then checks whether roof verges shed the water away from the surface of the wall, to avoid staining and damp issues.
Under stringent supervision of technicians at the company’s technical centre, both verge types were put through rigorous testing.
For the water leakage test, both verge types were laid on the rain-screening rig in accordance with the manufacturer’s laying instructions using Redland Mini Stonewold concrete tiles at a batten gauge of 335mm (75mm headlap).
They were tested in accordance with the standard, this being a pitch of 22° and a flow rate of 2l/min for a period of 10 minutes.
For the wind load test an upward force was exerted on the tile adjacent to the verge via a wire attached to the tile.
The force is increased slowly to replicate wind gusts and to test the mechanical fixing of the verge.
In both cases the dry verge products easily performed to the satisfaction of the standard. In fact, in the mechanical resistance test, the tile adjacent to the verge snapped while the verge remained firmly fixed.
Andrew Cross, Marketing Manager, commented: “Even though we knew Uni-Click and Contract to be BS 8612 compliant, it was pleasing to see these results: confirmation, if confirmation were needed; that Klober dry verges offer industry-leading performance.”
Klober Ltd
Unit 6F,
East Midlands Distribution Centre
Short Lane
Castle Donington
Derbyshire
DE74 2HA
Tel: 01332 813050
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