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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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Joining Gutter 3.0m Length
HC30PK10
January Sale - 5% Off Orders Placed Online Over £150.00. - Ends On 8th Jan 2009
Lasting as long as lead, Corodrain is tougher and cheaper.Gives a weatherproof seal between adjacent roofs. Joins any combination of double lap or interlocking slates, clayor concrete tiles, with minimum disturbance to the adjacent
roof. The design ensures that the slates don’t ‘kick up’.
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LEAD REPLACEMENT
GRP lasts as long as lead, is tougher, cheaper, more resistant to accidental damage, and is less prone to theft or vandalism. Using preformed GRP valley troughs saves significant installation time over traditional methods. Roofers report elimination of many problems with valley troughs when changing from lead to CORODRAIN GRP. Coloured lead grey as standard (other colours available on request). |
DURABILITY
Made with high quality un-filled polyester resin with glass fibre reinforcement for maximum strength. A tough bonded melinex film gives excellent weathering performance. Minimum life of 30 years. |
MANUFACTURED IN UK
Manufactured to ISO9000 quality standard, our automated continuous pultrusion plant in Coventry. All available from stock for rapid delivery to site. |
NO MAINTENANCE
The inherent qualities of the materials make the valleys UV light and acid rain resistant, and the smooth surface finish inhibits the growth of moss, lichen and the build up of debris. |
Sold in packs of 10
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