The adjoining profiles are simply overlapped by 100 mm or so, with the upper section inside the lower one. This prevents any water draining out of the joint allowing it to be carried down to the eaves.
Where there is a sprocket or change of angle in the verge, the end of lower section is cut to be perpendicular to the angle of the upper section allowing the upper section to fit inside without distortion. Click for more information on the DV7.
A batten end clip is the term given to a device that is fitted on to the batten ends at the verge to allow nailing or screwing into the end grain of the tile or slate battens.
Screws are sometimes recommended without a batten end clip but can be unreliable over long periods or if the batten ends are wet when the screw is inserted.
This will depend on the application. If it is desirable or necessary to ensure long term secure fastening, then batten end clips should be used as end grain fixing is not reliable or recommended.
Yes, they have all been tested for suitability and compliance. If the dry verge system is to be used or classified as a fixing, then the Danelaw batten end clips (HD IDV/BC) should be used, and they should be of the type and design tested to demonstrate wind zone compliance with the verge system being used under BS 8612.
Hambleside Danelaw have not tested other manufacturers batten end clips with any of the Danelaw dry verge systems, therefore compliance to BS 8612 cannot be claimed where these are used. Not all products available on the market meet the minimum product specifications for these either.
It is the most universal product on the market for single lap interlocking tiles, but may be limited in application depending upon the required batten gauge and is not suitable for some clay products with an interlocking headlap arrangement where the tiles are installed to a fixed gauge.
The batten range is from 260mm to 355mm.
No, this dry verge system is designed to suit single lap interlocking tiles that simulate the appearance of double lap plain tiles.
Currently there are no dry verge systems specifically designed for double lap tile installation.
For more information on the HD IPTDV, click here.
Yes, all our interlocking verge systems have design features specifically to prevent this and discharge water away from the wall complying with the test described in BS 8612. They should be installed with a small gap between the verge units and wall or barge boards.
At each course, only a little bit of water will pass into the verge unit where it will drain away rather than into the next lower unit. The same thing happens where the first unit is engaged with the starter unit which, by its very nature, extends beyond the line of the building or fascia board.