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Old 11 November 2011, 03:43   #21
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
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Originally Posted by BogMonster View Post
Are you sure? My father's conservatory roof is twinwall polycarbonate and he certainly manages to top up his tan ok which must involve UV
Perhaps yerr old man's fakin' it.

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Old 11 November 2011, 04:49   #22
Country: UK - England
Town: NW& wherever the boat is!
Boat name: depends on m'mood!
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Length: 6m +
Engine: etec130/big volvos
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this lot thinks it does
Multiwall polycarbonate sheets are the best solution for conservatory roofing for the modern home. Available in thicknesses from 4mm all the way up to 35mm for maximum insulation values and unrivalled color/tint options the polycarbonate sheet remains at the forefront of conservatory technology.
• Blocks 99% of UV radiation
• Superb thermal insulation with "U" values as low as 1.2
• Weather and UV resistant
• Light weight with excellant impact resistance
• Class 1 BS 476/7 Fire rating
once laid up a grp hull in a garage with a polycarbonate roof, it may block UV but it does get *!"*! hot under it!!!

Dave M
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Old 12 November 2011, 08:20   #23
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Originally Posted by BogMonster View Post
Yes it will. Anything that lets light through is going to allow that so you'd either need a solid roof, or a cover to go over the boat.
I don't think it will be an issue in reality. Polycarbonate sheet will absorb all the UV so you only have visible light coming through. Obviously coloured tubes absorb visible light too, but it will be pretty weak/diffuse light if any corrugated polycarbonate car ports I've seen are anything to go by.
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Old 13 November 2011, 09:00   #24
Country: UK - England
Town: Dorset
Boat name: Seabadger
Make: Ribcraft
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Sound. Thanks to everyone for the advice. It seems all I have to do is splash a bit of wood preservative on the support timbers, replace the doors with something a little more robust and secure and replace a few cracked panels. Nice n easy :-)

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