Ashmore Roof Inspection Report Purpose:

Provide a roof condition report following an Ashmore roof inspection. References are made to several Australian building standards including N.C.C 2016 Vol.2, AS 1562.1, AS 1562.3 & SA HB 39 2015: The Installation Code for Metal Roofing and Walling. For more information on these building codes, click here. Manufacturer’s Instructions that are referenced are attached to the report. We also provide recommendations to extend longevity.

Findings & Recommendations In Ashmore Roof Inspection

  • Water ingress is event related due to the recent weather events. Dining room has suffered wate ingress resulting in damage to the internal ceiling and wall linings. This may be more extensive on the upper side of the ceiling and wall cavity.
  • Evidence of previous repair to the flashing in the area of ingress using silicone, which has no longevity and breaks down under the sun’s UV rays. This is likely to trap in water and lead to ingress. It was not possible to determine if compliant installation has been achieved due to over sealing of the flashing joints, non-compliant to SA HB39 refer 8.2 and 5.8.3 as shown. Removing roof sheets and flashings in the area of ingress would help to discover the point of ingress, further investigation is required. Rectifying this issue will stop corrosion,future ingress and will increase longevity.
  • Evidence that compliant coverage of the apron flashings has been achieved, it was not possible to determine if compliant installation of the roof sheet being turned up (weathered) has been achieved. Given the low pitch of approximately 9.6 degrees it is important that this is done correctly as it prevents wind driven rain from entering the roof space. It would be beneficial to investigate further to see if the corrugated iron and polycarbonate roof sheets have been weathered.
  • Evidence of apron flashing with insufficient coverage from the overlap timber cladding detail, non-compliant to SA HB39 refer 5.5 as shown. Installing extra timber cladding will increase the overlap which will make it compliant and stop future ingress and will increase longevity.
  • Evidence of gaps between timber cladding, also gaps between timber cladding and roof sheets. It is important to rectify this issue as it prevents wind driven rain from entering the roof space. Rectifying this issue will stop future ingress and will increase longevity.
  • Evidence of gaps between apron flashings and roof sheets. Apron flashings need to be tightly notched (scribed)and cut to suit the profile of the sheet, as shown above in 8.2(b ), it is important that this is done correctly as it prevents wind driven rain from entering the roof space and is a requirement for all roofs in QLD. Rectifying this issue will stop future ingress and will increase longevity.
  • Ridge flashing joints are not undersealed and have insufficient fasteners, with gaps present, non-compliant to SA HB39 refer 8.2 and 5.8.3 as shown above in #1. This will also reduce longevity as moisture from condensation gets trapped between the flashings leading to corrosion and future ingress. Rectifying this issue will stop future ingress and will increase longevity.
  • Evidence of previous repair to the flashings using silicone, which has no longevity and breaks down under the sun’s UV rays. This is likely to trap in water and lead to ingress. It was not possible to determine if compliant installation has been achieved due to over sealing of the flashing joints, noncompliant to SA HB39 refer 8.2 and 5.8.3 as shown. Rectifying this issue will stop corrosion, future ingress and will increase longevity.
  • Evidence of pipe penetration that is heavily reliant on silicone which has no longevity and breaks down under the sun’s UV ray. Also potential for future ponding, corrosion, and ingress, given the low pitch of approximately 9. 7 degrees. It would be beneficial to install a tray flashing with the Dektite in diamond formation on top to allow total drainage. Rectifying this issue will stop future ingress and will increase longevity.
  • Whirlybirds are factory produced and limited to their coverage. It is recommended to have 150mm of effective coverage as shown above in SA HB39 refer Table 8.1.4. as shown. Rectifying this issue will stop future ingress and will increase longevity.
  • Ponding is occurring to the eaves gutter in various areas around property, noncompliant to SA HB39 refer 4.5.3 as shown. Total drainage required of roof components. Rectifying these issues will stop future ingress, corrosion and will increase longevity.
  • Dissimilar metal water runoff through the aircon is evident If not rectified this will lead to possible failure of the roofing materials. Rectifying this issue will stop future ingress, corrosion and will increase longevity.
  • Downpipe spreader, non compliant to SA HB39 refer 5.7.7 as shown. Spreaders are to discharge all roof water in the direction of flow avoiding discharging onto laps of roof sheets and flashings. Rectifying this issue will stop future ingress, corrosion and will increase longevity.
  • Insufficient installation of the insulation blanket. The insulation blanket has dropped in various areas. Rectifying this issue will make it compliant and will increase longevity.

Conculsion Outlined In Ashmore Roof Condition Report

Water ingress was most likely caused by lack of maintenance, repairs and faults as highlighted in this report. These issues have been aggravated by extreme recent weather events. Previous repairs are evident, and it would be beneficial to have these issues rectified to increase longevity.

Reference Images Used In Ashmore Roof Condition Report

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