MrMark wrote:
Hi All.

I have a 4 year old concrete section garage which I'm trying to make
water tight.

I have two problems.

1, When it rains, droplets of water form on the underside of the
garage roof. The roof is made of a corrugated construction. I'm
guessing iron... 2, Again when it rains, water is seeping underneath
some of the panels.

From what I have read, it looks as though the roof may have become
pours. Therefore I plan to seal it. With what, I'm not yet sure.

With regards to the panels. I have put a fillet of mortar around the
bottom of the panels on the outside. However, this has only slowed
down the water seeping in.

Has anyone got any ideas on how to solve the two problems and the best
product to use.

Many thanks.

Hmmm. Is this water seepage or air condensation now that the weather is
getting cold? If you are CONVINCED that its water seepage/porous roof, I'd
be inclined to suffer it until the spring/summer then remove the roof
cladding and fit a damp-proof membrane over the supports before refitting
the cladding. If th's air condensation then the above remedy won't work -
it'll still "rain" on the inside due to lack of ventilation

I'm surprised that corrugated iron would rust so much in 4 years to become
porous - but there again I don't know your location.

If the construction IS corrugated iron, and you decide to remove the
cladding to do what I suggested, then I'd be inclined to replace the
cladding with zinc plated corrugated iron - otherwise you'll be doing this
again when the old stuff rusts further

Ensure that you seal around all roof fixings thoroughly to prevent water
ingress (which may be what you are suffering from in the first place come to
think of it - failed seals on the roof fixings).

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