Johnny i won't lie to you. Using hand saw as Sliding mitre not set up yet. Lost my vac hose somewhere. Been quite satisfying doing some old skool sawing
I'm going to use OSB over studwork but I'm not unsure about where the gaps should be.I wouldn't do that in a shed.
It would most likely rot the wall as there would be no breathing between wall and ply.
I would stick to simple things, unless you create a ventilation cavity between the ply and wall, but that would lose you at least 68mm.
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