Corodrain Universal Dry Fix GRP Valley Trough - 280mm x 3000mm Dimensions Width : 280mm. Standard Weight : 1.83kg/m². Lengths & Codes : DVU30 @ 3000mm. Thickness : 1.3mm. Features • Lasts as long as lead, minimum 30 years. • At least as d... Read More
Corodrain Universal Dry Fix GRP Valley Trough - 280mm x 3000mm
Dimensions
Width : 280mm.
Standard Weight : 1.83kg/m².
Lengths & Codes : DVU30 @ 3000mm.
Thickness : 1.3mm.
Features
• Lasts as long as lead, minimum 30 years.
• At least as durable as lead.
• More resistant to accidental damage.
• Less prone to theft.
• Quicker to Install.
• Similar appearance to lead.
• Considerable cost savings.
• UV light and acid rain resistant.
• Smooth surface inhibits the growth of moss & lichen and the build up of debris.
• Fixes over batten for fast simple installation.
• Requires less maintenance than an ordinary valley.
• No wet trades needed, can be fitted in any weather.
• Suitable for use on roofs with pitches 17.5º to 49º.
• Can accommodate a maximum difference between two rafter pitches of 15º.
Installation
1. Valley boards must be fitted of sufficient width to provide support for the roofing battens, either: min. 12mm ply lay boards set between the rafters, or 6mm continuous ply boards laid over the rafters.
2. A single strip of roofing underlay should be laid up the centre of the valley.
3. Counter battens the same depth as the roofing battens should be fitted onto the valley boards.
4. The main roofing underlay should be laid over the counter batten.
5. Roofing battens should be fitted with the ends firmly located onto the valley boards, positioned close to the counter batten, with care taken to avoid damaging the underlay.
6. The fascia board should be cut to allow the GRP valley trough to pass through and discharge into the gutter without flattening out.
7. The end of the GRP valley trough should be trimmed using a fine toothed hacksaw to the approximate centerline of the gutter -which normally entails a ‘V shaped’ cut.
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