FreddieLIVES wrote:

The garage has always leaked, but I have only been in the house for 3
years and I know, according to the neighbours that the garage has been
there for at least 25 years.

Anyway guys/gals. Thanks for the advice and I will get some sealant
for the gaps.

I fixed my concrete sectional with stuff called trowel mastic I found at
thee back of a B&Q after advise in this forum. It's gritty and oily and
wearing gloves I pushed it by hand into the bottom edge of the walls and
partway up the gaps, smoothing it off like sealant. I needed 1 1/2 tubs
to do mine. It has worked well, for 18months. Recently one corner has
begun to leak again. Sod's law dictates it is the corner with things in
that are difficult, or problematic to move. I shall wait for warmer
weather before tackling it though.

My garage sits on a concrete pad and in places (like outside this
problem corner) it slopes inwards towards the walls so that rain pools
there and so is free to work its way under the walls. It may be that I
have to fix that problem for the internal repair to last longer.

Peter

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