On Wednesday, November 27, 2019 at 2:53:15 PM UTC, JimK wrote:
Wrote in message:
On Tuesday, November 26, 2019 at 8:48:13 PM UTC, wrote:
On Tuesday, November 26, 2019 at 10:07:42 AM UTC, Martin Brown wrote:
On 23/11/2019 22:56, wrote:
New house has a brick built workshop with a much neglected flat roof,
felt over OSB. The roof is seriously mouldy in places - I can ram my
wrecking bar right through it. Pitch is about 1 in 40. The timbers,
at least the ones I've checked, have a fair covering of mould in
places, but appear otherwise sound.

It isn't clear from your description if you mean mould or rot.

https://flic.kr/p/2hRAzS6 - apparently a thin surface layer on the timber which still seems solid (poking from ground level with a rod). The whiter layer on the OSB to the top-left of pic is a much thicker layer.


Timbers look OK to me in that pic.

The thicker layer looks like wet rot but it's on the bit you'll
eventually strip?

Yup. I've started stripping it. One bit was sufficiently soft that I didn't dare stand on it - and at another point, Underneath, top half inch of some timbers are soft, but only in a wet sort of way, not decayed. I hope!

#VizTopTip - when lobbing an 8x4 off a roof, remember not to do it on the same side of the roof as you put the ladder.