Banyo Roof Inspection Purpose:

Provide a roof condition report to AS 1562.1 AS 1562.3 And SA HB 39 2015: The Installation Code for Metal Roofing and Walling. Also provide recommendations to extend longevity.

Inspection Site Gallery

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Findings & Recommendations Report For Banyo Roof Inspection

  • Severe ingress is occurring in the stairwell.
  • Ingress is likely occurring in the location shown. The wall was installed prior to the planter box and there is no waterproofing between the two apart from over seal silicone.
  • Wall sheeting needs to be removed and a capping/apron flashing needs to be installed to prevent further ingress. Alternatively, a capping flashing can be installed over the planter box wall with an apron back and a pressure flashing installed against the wall.
  • Barge capping is damaged in the circled location and falling to the outside of the building, during rain events the water is running down the flashing and hitting the damage and going down the wall feeding the ingress point below.
  • Non-compliant to SA HB 39 refer 8.7, perimeter flashings are to fall back towards the roof.
  • Standard roof screws with neoprene washers are not designed to be flooded on flat surfaces and will not be warranted by the manufacturer. Installing 19mm aluminium bonded washers to all fasteners on tray flashings will rectify this.
  • Downpipe spreaders are non-compliant to SA HB 39 refer 5.7.7, spreaders are to discharge in the direction of flow. Note these spreaders are discharging directly into a lap with potential for
    ingress to occur.
  • Several areas of the roof. Sheet end pans are not turned down as per manufacturer’s installation instructions, potential for ingress to occur from water drawback
  • Potential ingress point as the flashing has not been weathered sufficiently at the end.
  • A tray flashing needs to be installed here to prevent moisture being trapped under the barge capping, non-compliant to AS 3500.3 refer 4.4.3. Also note the sheet overhang here is
    under the 50mm minimum with potential for ingress to occur in this location.
  • It would be prudent to extend the tray flashing over the short ended sheets here, as replacement of concealed sheeting is not viable.
  • Rivets should be silicone over to prevent ingress as they have a hole in the middle. Also note the flashing coverage at the penetration is non-compliant to SA HB 39 refer table 8.1.4.

Building & Installation Code References from Banyo roof inspection report:

8.1.3 Expansion Provision

Roof flashings and cappings are to be installed to permit longitudinal expansion and contraction without detrimental effect to the flashing themselves and other roof components, structures and covers.

Roof flashings and cappings fastened to metallic roof covering materials are not to be fastened to other building materials with other than sliding cleats or fixings.

8.7 All Other Flashings and Cappings

b) Parapet cappings: Parapet cappings to be fixed to parapet walls at intervals not exceeding 500 mm with masonry anchors and cleats that permit longitudinal expansion and contraction. A minimum fall of 3 degrees to be provided across the width of the flashing, to divert water back onto the roof coverings so as to prevent the water from dripping down the fascia causing insightly staining.

5.7.7 Spreaders

Spreaders may be used to durian rainwater from a higher roof surface with a catchment area not exceeding 15m squared provided the following conditions are satisfied.

  • When discharging onto a tiled roof, the lower section is sarked a minimum width of 1800 mm, either side of the point of discharge extending down to the eaves gutter.
  • When discharging onto a corrugated roof, a minimum width of 1800 mm on either side of the point of discharge is sealed for the full length of the side laps.
  • The increased roof water volume from the upper roof is not to enter any seam of the roof coverings of the lower roof.
  • No spreader is to discharge roof water onto or over ridge tiles, mortar jointed tiles, flashings, timber fascia or a roof sheet side lap.
  • No spreader is to have its discharge entering any part of any building.
  • Spreaders are to discharge all roof water onto roof coverings in the direction of flow, avoiding discharging onto laps on lower roof sheets and tiles.
  • Spreaders do not discharge on sheets or tiles discharging to valleys.
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