Some recent extension work involved slightly changing the run-off point
from a section of flat roofing. Where the new felt at the run-off point
was bonded to the old felt there's now a ridge (about 5mm) so an area of
about 1m square stays wet until it evaporates.
Is this a problem?
The builder says the only solution is to strip and re-felt the whole
flat roof but this wasn't in his quote.
--
Dave S
(The return email address is a dummy)