Triassic Posted March 5, 2019 Posted March 5, 2019 I’ve just opened up a pack of roof battens and although they are treated, they have a white fungal growth on them. Can anyone identify it, Should I be worried? Would you use them or return them to the supplier?
Ian Posted March 5, 2019 Posted March 5, 2019 I'd return them. It's not worth taking the risk. How long have you had them stored?
Jeremy Harris Posted March 5, 2019 Posted March 5, 2019 I'd reject them, too, as they aren't dyed, so may well not be roofing battens at all. I believe that all roofing battens are required to be dyed a bright colour (around here they used to be blue, but are now pink, no idea why). 1
Mr Punter Posted March 5, 2019 Posted March 5, 2019 Also should be stamped BS####. Get John Brash or similar so you know they have been correctly treated and graded.
Triassic Posted March 5, 2019 Author Posted March 5, 2019 16 minutes ago, Mr Punter said: Also should be stamped BS####. Get John Brash or similar so you know they have been correctly treated and graded.
Ian Posted March 5, 2019 Posted March 5, 2019 Just now, willbish said: Have they been hanging around since 2011? The 2011 marking is not the date of the timber but refers to British Standard 8417 2011
Mr Punter Posted March 5, 2019 Posted March 5, 2019 "All battens must be stamped with information identifying the origin, size, supplier and conformance to BS 5534"
Jeremy Harris Posted March 5, 2019 Posted March 5, 2019 BS8417:2014 (not the outdated BS8417:2011) only refers to preservative treatment, though, not structural grading (which is what BS5534 is about as far as battens are concerned). Judging from the big knots present the battens in the photo haven't been graded as roofing battens.
iSelfBuild Posted March 5, 2019 Posted March 5, 2019 (edited) I'd reject them too, round here most of the merchants have the green ones - not necessarily dyed like the red/blue colours you see but most definitely treated. Seen red and blue ones on a few sites, can't say I know the difference between the colours but it will mean something. Edited March 5, 2019 by iSelfBuild
Mr Punter Posted March 5, 2019 Posted March 5, 2019 BS 5534 is def what you want for roofing. The ones in the photo are not. They allow a depth tolerance of +3mm - 0mm, so between 25mm and 28mm, which those in the picture do not seem to be. Also, as @JSHarris noted, the knots would rule them out.
PeterW Posted March 5, 2019 Posted March 5, 2019 I have had a similar growth on dyed and treated battens - Looks like a leaf mould that would grow in any damp conditions and a lot of the battens I’ve seen in merchants are dripping wet and outside.
Triassic Posted March 5, 2019 Author Posted March 5, 2019 (edited) Thanks everyone for the advice, they’ve gone back and are being replaced with the correct ones. look what’s just arrived! Edited March 6, 2019 by Triassic
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