Many buildings may be able to be made lower risk by adding eaves. Typically, pitched roofs can have outriggers flitched to the rafters or truss top chords to create eaves
Fitching new outriggers to a truss top chord or rafter to create an eaves overhang.
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Modifying reversed-slope eaves
For reversed-slope eaves with exposed rafters, water entry is common around the rafter where it penetrates the cladding.
While the repair will look different, adding a soffit lining and flashing will give the detail some safety. If the look of the exposed rafter is to be retained, adding a false rafter underneath is an option.
Repair option to reversed-slope eaves – while the appearance has changed, the weathertightness risk of the existing detail is removed.
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Modifying flush eaves
Many buildings that require remediation were built with flush eaves. It was common for a plastered finish to simply butt into a fascia or barge board, which cracked and allowed water in.
The figures below give two detailing options that retain the flush eaves and modify the critical junction by ensuring deflection of water can occur but do not provide the protection to the top of the wall that wide eaves do.
Modifying flush eaves option 1: Repair option without extending the roof structure – new flashing to have 35 mm minimum lap over cladding and under barge board.
Modifying flush eaves option 2: Alternative detail where roof structure is modified to allow the fascia or barge board to overlay the new cladding on a cavity.