INSTALLERS PLEASE READ THIS
For new or existing roofs
ROOF SHEETING VARIATIONS
The major problem with using profile cut flashings is shrink or creep of the roof sheets. This may be due to deliberate shrinking or expanding of the sheets, or sheets being pulled apart or pushed together at the joint to run parallel with the building. It can also be caused by sheet and roll-mill variations.
Retroseal Ridgeseal addresses these problems by being made in sheet widths, so the creep or shrink of each sheet doesn’t progress. It is slightly longer to allow for overlapping at sheet edges, and can also be cut in two to offset variations that can accrue (see below).
FITTING AND FIXING
For existing ridge
Back off ridge cap screws, slide the flashing under the edge and re-tension. Rescrew through flashing if it obstructs existing holes.
For new ridge cap
Install ridge cap in the usual way, and fasten with minimal screws to hold in position. Then progressively slide the flashing up and under the ridge cap edge, removing tacking screws as necessary, and then screw all profiles through flashing. If battens are remote to flashing, additional 10/16 Teks with Neo will give securement.
Fitting to roof profile
Ideally the tabs will sit centrally in the roof sheet profiles. Where this does not occur, cut the flashing at an appropriate place, creating an overlap, and allowing the tabs to fit naturally into the profile.
BAL. For buildings that have to meet the Australian Standard BAL regulations, it is the responsibility of the installer to be aware of these requirements, and to identify and close any gaps that exceed 3mm.
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