HOW TO INSTALL RETROSEAL ROOF SEAL FOR SHEDS

ROOF SEAL is a two piece all steel zincalume flashing that fits behind gutter brackets and gutter, under the overhanging roof sheet.

PART A angle fits on top of the wall sheet, closing off the profiles and the pan areas. It has different offsets to suit a variety of wall sheet profiles. PART B fits over PART A. It is tabbed to fit into the roof sheet profile, and is made to conform with the roof pitch as specified.

ADDRESSING SHRINK AND CREEP

The major problem with using profile cut flashings is shrink or creep of the wall sheets. This may be due to deliberate shrinking or expanding of the sheets, or sheets being pulled apart or pushed together at the joint by installers to run plumb with the building. It can also be caused by sheet and roll-mill variations.

Retroseal Roof Seal addresses this problem by being made in sheet widths, so creep or shrink of each sheet doesn’t progress, and is slightly longer to allow for overlapping at joints.

FITTING AND FIXING

Part A is positioned over the top of the wall sheet, closing off the profiles and pan areas. A pop rivet or button head tek screw in the profile may be used to hold it in place.

Part B is then placed over Part A, with the tabs fitting into the roof sheet profiles and facing outwards.

Ideally the tabs will sit centrally in the profiles. Where variances occur:

* With high profile products, where two tabs fit neatly and the third and fourth tabs progress off-centre, cut the flashing in half between the second and third tab, allowing overlapping.

* In the case of corrugated, cut the flashing at an appropriate place to allow the tabs to fit naturally into the profile.

It may be necessary to adjust over- or under-screwing of the roof sheet to ensure a neat fit.

Part B should be fixed at its vertical face to the sheet profile by either rivets or button headed tek screws, ensuring that Part A is also secured.

A light tap with a hammer will extend the tab deeper into the roof profile, for improved fit.

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.