On 11/06/2021 15:45, Dave Plowman (News) wrote:
Chap finally came round today. He's the builder the architect who designed
the conversion all those years ago now uses. I simply don't know any
roofers. And would rather go by a recommendation.

Interesting chap. Said he is a builder, not roofer. Who now does roofs on
his jobs himself. After getting ripped off once too often with
contractors. ;-)

And only does glass fibre. Felt is for sheds, he says. Fairy nuff - no
point in learning more than one skill if you're not going to use it.

Tim guessed right. He wants it scaffolded for safety reasons - even
although he went up to have a good look without. However, I could make use
of the scaffold to paint the window. It was done a couple of years ago.
But be silly to pay for scaffolding again in a year or so.

He reckoned about 5 days work, assuming the base is OK. The BOM from the
architect specified marine ply, so I'm hoping that's what was used, and is
still OK. There are no signs of sagging.

This might be of interest.

https://www.diynot.com/diy/threads/m...e-roof.333510/

It seems OSB grade 3 might be best. Make sure it is the right grade.
https://en.wikipedia.org/wiki/Oriented_strand_board

Be wary of where he gets the marine ply from. Some is certified, and
some isn't.

It is still recommended to paint all edges with a sealer, for both OSB
and marine ply.

Found an online calculator which reckoned on about 500 quid for materials.
He's going to give me a price next week.