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Roof area less than 25m² |
Roof area 25 - 100m² |
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Rafter Pitch
(degrees) |
Valley Type |
Max. Vally
Lenght |
Valley Type |
Valley Type
Lenght |
Minimum Lap
Lenght |
| 17.5 to 22 |
B/D |
7.0m |
- |
- |
350mm |
| 22.5 to 29 |
A/B/D |
7.0m |
B/D |
14.5m |
300m |
| 30 to 34 |
A/B/D |
7.5m |
B/D |
15.0m |
200m |
| 35 to 39 |
A/B/D |
7.5m |
B/D |
15.5m |
200m |
| 40 to 44 |
A/B/D |
8.0m |
B/D |
16.5m |
150m |
| 45 to 49 |
A/B/D |
8.5m |
B/D |
17.0m |
150m |
| 50 to 55 |
B/D |
9.0m |
B/D |
18.5m |
150m | |
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| Valley Weights |
Valley Thickness |
| Standard valley troughs (HD, HA, HB) |
1.64kg/m² |
Standard valley throughs (HD,HA,HB) |
1.3mm |
| Heavy weight valley troughs (DX,AX,HB) |
2.10kg/m² |
Heavy weight throughs (DX,AX,BX) |
1.6mm | |
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Corodrain Diamond 60
January Sale - 5% Off Orders Placed Online Over £150.00. - Ends On 8th Jan 2009
Heavy weight type B or D valleys with the addition of floride based patented surface protection. Provides complete protection against UV light, resistant to virtually all chemicals,solvents and pollutants,temperature range -40º to +100º. The durability of Diamond 60 has been recognised as matching code 7 lead by Housing Association Property Mutual (HAPM). Designed for very harsh environments or prestige building.
Sold in packs of 10
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