On 28/07/2020 15:02, Theo wrote:
Andrew wrote:
Sounds like it has already leaked allowing the decking to weaken and
sag, hence the ponding. Complete re-decking it the solution.

That's what I suspected. Although I wondered if there was a say 5 year
shorter term fix?

Be aware that part L means it will need to be insulated and too
many roofing people will insist on adding insulation on top of the
decking and then putting the felt over the insulation. If your flat
roof is a 'cold roof' (most are) , this is s complete waste of time
since the ventilaton will still allow cold air to circulate underneath
the insulation.

This is a semi-integral garage, so I'm not sure part L applies? It's still
got a great big garage door, even if the internals are a bit nicer than a
normal garage. It isn't heated.

No, but the internal garage walls are partition walls separating garage
from living rooms/kitchen, so hopefully they will be insulated. If its
a 1960's build then insulation will be minimum.

Quoters seemed to suggest stripping it back to add insulation would be much
more than a simple re-roof.

Trying to avoid 'and while you're doing that...' project creep.

Theo