Purpose Of Glendenning Roof Inspection

Provide a roof condition report to N.C.C 2019 Vol.2 3.5.1.2 Roof Tiling. Roof tiles, complying with AS 2049 (Roof Tiles), must be installed, fixed and flashed in accordance with the relevant provisions of this part and Manufacturer’s Instructions. For more information about our Western Suburbs roof inspection services, please click here.

• Provide a roof condition report to N.C.C 2019 Vol.2 3.5.1.2 Roof Tiling. Roof tiles, complying with AS 2049 (Roof Tiles), must be installed, fixed and flashed in accordance with the relevant provisions of this part and Manufacturer’s Instructions.
• Apron flashing not fitted behind FC weatherboard sheeting and silicone not sandwiched between flashing exposed to ultraviolet light.
• Ridge capping mortar pointing appeared current and were of different colours on upper and lower ridge that may indicate more than one repair or contractor activity took place
• Ceiling repair below item #1 flashing repair showed no obvious moisture staining/marking observed and when moisture tested in the ceiling space above. The plasterboard ceiling registered 0% with moisture metre
• Fascia gutters ponding and contained organic matter in areas and roof overhanging the guttering more than 50mm in areas
• No sarking observed under roof tiles. Roof pitch is between 19 & 200. In this case the main roof pitch was approximately 200 in pitch and the common rafter was approximately 5000 mm in length and requires sarking.

NCC 2019 3.5.2.3 Flashing

Flashing for roof tiles must comply with the following:

(a)Wall and step flashings:
(i)For masonry or similar walls, flashing must:
(A)follow the roof line, allowing not less than 75 mm upturn to the wall and a minimum of 150 mm in width and moulded into the tiles; and
(B)have a horizontal over flashing, stepped over flashing or raked over flashing built into the masonry leaf or veneer, except that one continuous flashing may be used as both an apron flashing or an over flashing; and
(C)have joints overlap the one below by not less than 75 mm in the direction of flow.
(ii)For flashing where the upturn can be fixed to or behind the supporting frame or cladding, it must-
(A)follow the roof line, allowing not less than 75 mm upturn to the wall and a minimum of 150 mm in width and moulded into the tiles; and
(B)be fastened into or behind the wall cladding at each end and at a maximum of 600 mm centres;

AS 3500.3 – 2003 – Stormwater drainage

4.5.3 Eaves gutters

Eaves gutters shall be installed as follows:
(a) Gradients Deviations from nominal gradients shall be smooth and not cause
permanent ponding.

NOTES:
Where a building is likely to move due to reactive soils, gradients may need to be not flatter than-
a) 1 :250 to achieve an effective gradient not flatter than 1 :500; or
b) 1 :500 to achieve an effective gradient with no permanent ponding.
Light condensation will not generally cause permanent ponding, whereas heavy condensation, particularly in conjunction with retained silt, can reduce the design lifetime of the product.

4.13.2.2 Sealant

Sealant joints shall be used in conjunction with mechanical connections or fasteners as specified in AS/NZS 2179.1, spaced at not more than 40 mm centres. The sealant shall be sandwiched between clean surfaces of the components of the joint to ensure a positive seal and to protect the sealant from exposure to ultraviolet radiation.

Roof tiles AS 2050 Installation Of Roof Tiles

3.3.5 Eaves Tiles

Eaves tiles shall overhang the fascia or tilting batten by an amount sufficient-
(a) to ensure that water discharges into the gutter; and
(b) to permit replacement of the gutter.

NOTE: This will usually mean an overhang of about 50 mm ±15 mm.

AS 2050 Tiled Roofs

table 1 shows that where a roof pitch is from 180 to 200 the maximum rafter length without sarking is 4500 mm

Class 1 & 10 Buildings NCC 2019

Table 3.5.2.2 Sarking requirements for tiled roofs