The lovely weather this weekend highlighted a previously unobserved
feature of our basement flat, a leak.
Our kitchen is under the pathway leading to the ground floor front
door of the flats above (so long and thin, or galley style as the
estate agents would have it). It has been tanked on the end wall and
side wall and pre-existing plasterboard left in place on the ceiling
and other wall.
So clearly there is a problem and it is now all buried. It seems most
likely to be coming through the roof. We did check the water-proofing
on the ceiling, but it was Summer and so hard to test thoroughly.
The water is coming through very slowly, just about running down to
the floor in one or two places.
So the question: access to the ceiling is a nightmare. Is there
anything we can do on the outside to improve the waterproofing? The
pathway is asphalt - is there anything you can paint onto asphalt to
make it more water resistant?
Any thoughts much appreciated