Purpose Of Liverpool Roof Inspection

Provide a roof condition report to N.C.C 2016 Vol.2, AS 1562.1, AS 1562.3, SA HB 39 2015: The Installation Code For Metal Roofing and Walling as well as Manufacturer’s Instructions. For more information about our Western Sydney roof inspection services, click here.

• There was no over flashing to the conjoined walkway roof wall junction
• There appeared to be no turn-up or rib on the sheet pan under the apron flashing on the roof above the entry/ central hallway to the building. Apron flashing is covered with temporary adhesive tape to prevent water ingress
• Roof penetration collar flashing over-coated with black bituminous sealant and collar blocking downstream flows
• Trays not continuous coverage width over ribbed roof sheet trayed roof penetrations
• Exposed silicone to sheet overlap
• Crack/split in ridge capping and silicone adjacent crack exposed to ultraviolet radiation
• Aluminium flashing patch reliant on silicone seal only, no vertical continuous side flashing fitted between junction of window and wall panel (should be a continuous window side flashing detail). For typical flush mounted aluminium and timber framed window details, refer to Figures 17 and 18 respectively. These figures include optional decorative mouldings that can be used to create a sense of depth around windows just like a rendered masonry wall. Refer to Section 9 for further information on decorative mouldings.
• There was no 50mm minimum roof overhang of into gutter
• Silicone exposed to ultraviolet radiation on ridge capping repair/rectification
• Silicone to pressure flashings un-adhered and decomposing to parts of masonry wall/flashing junction
• Downpipe spreader outlet discharging too close to wall flashings and also discharging onto roof seams
• Vertical face of apron flashing behind wall cladding not overlapping vertical face of adjoining masonry wall (slip joint flashing suggested)
• Roof pitch on roof is 2.9 degrees and less than minimum of 12.5 degrees and not suitable for a standard valley gutter on roof
• Water ponding to gutter pans on high side of roof ventilators
• Sheet overhang into valley box gutter not minimum 50mm
• Downpipe spreaders outlets on lower awning roofs in the central courtyard discharging onto wall flashings and also discharging onto roof seams.
• Unsealed gaps and exposed silicone in corner of clerestory skylight (on roof south western corner)
• No rain-head installed at box gutter outlet
• No turn down to a sheet end in a valley gutter
• Silicone exposed to ultraviolet radiation around roof penetration collars
• No 150mm opening width at roof valley. Roof sheeting overhanging roof valley too far on upper roof
• Roof capping detail not folded toward downstream direction of flow
• Silicone exposed to ultraviolet at valley flashing sheet junctionsNote, sealing sheeting to flashings in this fashion traps moisture from condensation and results in reduced longevity.
• Sheets not sealed off to sheet rib ends at valley flashing sheet junctions
• Roof pitch on lower awning roofs are less than 12.5 degrees and not suitable for a standard valley gutter on the lower awning roofs
• There was silicone exposed to ultraviolet radiation at gutter outlets
• There were no holes in the downpipe spreader to distribute storm-water evenly to the southern awning roof
• There was organic debris blocking the gutter guard and overflowing the eaves guttering from the downpipe spreader on the lower western awning roof
• There was sealant exposed to ultraviolet radiation around exhaust ventilators and to roof penetration collars
• No down turn to edge capping at high end of roof
• Roof penetration collar on photovoltaic arrays partially blocking downstream flows and mould/organic deposits around penetration collar