Small roof and skylight replacement

Challenges

Box gutters had been installed incorrectly, with a new gutter sitting inside an older rusted gutter. Both had deteriorated and required removal.

Corrugated roof sheets were unsuitable for the low-pitch roof, allowing water to curl back behind the gutters.

Roof sheets had insufficient overhang into the gutter, further contributing to leaks.

The polycarbonate skylight panel was absorbing and channeling water into the roof structure.

Multiple areas required custom flashing to ensure water was diverted correctly and the system was compliant.

Scope of Work:

Box Gutter System

Removal of existing roof sheets, flashings, and rusted gutters.

Adjustments to rafters to allow for an enlarged gutter capacity.

Installation of a custom Colorbond box gutter (0.55 BMT), sized to meet current Australian building standards.

Roof Sheets & Flashings

Installation of new Colorbond Kliplok roof sheets (0.48 BMT) designed for low-pitch roofs, cut to correct length for proper gutter overhang.

Installation of all required flashings, cappings, backtrays, and Dektites (0.55 BMT) to create a watertight finish.

Chimney Flashings

Fabrication and installation of custom Colorbond chimney flashings, including over flashings, under flashings, and backtrays (0.55 BMT).

Skylight System

Removal of the leaking polycarbonate skylight panel.

Installation of a Velux skylight fitted to the existing opening.

Supply and installation of custom Colorbond skylight base flashings and backtrays (0.55 BMT) for complete waterproofing.

Outcome

The rectification works resolved all sources of water ingress and upgraded the roof to a compliant, watertight system. The enlarged box gutter improved drainage capacity, while the new Kliplok sheets provided proper coverage and protection for the low-pitch roof design.

The installation of a Velux skylight with custom flashings replaced the failing polycarbonate panel, ensuring natural light could still be enjoyed without compromising water tightness.