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Material Properties of the Products

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

Results of Testing of Wind Uplift for the Products

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

Results of Testing of Dynamic Pressure Water Infiltration for the Products

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