Cheers lads, it is coverboard and 10mm not 9 Its leftovers from another extension, price was right and it will cover the old wooden fascias.
Just to go of on a tangent the extension is also getting UPVC fascia, visited 3 merchants today for quotes and every one suggested putting up timber backing and capping with the same 10mm.
They say they sell very little 18mm fascia and most of the builders around here use this method. Any thoughts?
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