C
charlie1
The quote is correct but be aware that BS5385 is industry guidance - not law.
It's something to work to but in reality, if any of us here were making 1mm lips across joints less than 6mm - we would not be working to a good standard.
0.2mm is poor, never mind 1mm!
don't want to hijack this thread but that really did wake me up! .2mm is "poor"