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From [Institution name]
Property |
Requirement |
Result |
---|---|---|
Thickness (mm) |
≥ 0.33 |
0.62 |
Thickness of zinc coating ( g/m2 ) |
≥ 275 |
315 |
Coating quality |
Smooth and uniform, free of pinholes, cracks, blisters and flaking |
Pass |
Flexibility |
No flaking or microcracking |
Pass |
Humidity resistance |
No formation of blisters |
Pass |
Durability |
No sign of any change |
Pass |
Total dry film thickness ( µm) - AstonWood® |
≥ 25 |
25 |
Total dry film thickness ( µm) - StoneCrest® Tile |
≥ 25 |
27 |
Total dry film thickness ( µm) - StoneCrest® Slate |
≥ 25 |
28 |
Dry film hardness |
No rupture |
Pass |
Adhesion - dry |
No removal of film |
Pass |
Adhesion - wet |
No removal of film |
Pass |
Impact resistance |
No removal of film |
Pass |
Abrasion resistance - AstonWood® |
Coefficient value ≥ 40 |
44.4 |
Abrasion resistance - StoneCrest® Tile/Slate |
Coefficient value ≥ 40 |
41.7 |
Acid resistance - 10% sulphuric acid |
No loss of integrity or appreciable change |
Pass |
Acid resistance - 10% hydrochloric acid |
No loss of integrity or appreciable change |
Pass |
Acid resistance - 10% nitric acid |
No loss of integrity or appreciable change |
Pass |
Salt spray resistance - AstonWood® |
≥ 7 rating |
7 |
Salt spray resistance - StoneCrest® Tile/Slate |
≥ 7 rating |
10 |
Pressure (kPa) |
Time (s) |
Requirement |
ResultFootnote (1) |
---|---|---|---|
0.5 |
10 |
No evidence of deformation, permanent damage or failure |
Pass |
1.0 |
10 |
No evidence of deformation, permanent damage or failure |
Pass |
1.4 |
10 |
No evidence of deformation, permanent damage or failure |
Pass |
1.9 |
10 |
No evidence of deformation, permanent damage or failure |
Pass |
2.9 |
10 |
No evidence of deformation, permanent damage or failure |
Pass |
3.8 |
10 |
No evidence of deformation, permanent damage or failure |
Pass |
4.3 |
10 |
No evidence of deformation, permanent damage or failure |
Shingle unclipped |
4.8 |
10 |
No evidence of deformation, permanent damage or failure |
– |
Wind Speed (km/h) |
Simulated Rainfall (L/m2·min) |
Time (s) |
Requirement |
ResultFootnote (1) |
---|---|---|---|---|
34-59 |
3.4 |
5 |
No leakage or damage |
Pass |
84-96 |
3.4 |
5 |
No leakage or damage |
Pass |
104-117 |
3.4 |
5 |
No leakage or damage |
Pass |
117-144 |
3.4 |
5 |
No leakage or damage |
Pass |
154-170 |
3.4 |
5 |
No leakage or damage |
Pass |