On 09/08/2018 18:58, tony sayer wrote:
new rood boarding to replace the likely bu^^ered chipboard

What is rood boarding ?.

Being a garage you must be able to see the underside of the
roof, so any wet and sagging chipboard is obvious.

You've had 3 months of dry weather to have it done, and
now it will be wet for a week or so, then getting hotter
again !!