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My house has a Marley garage that is approx 20 years old and is leaking from above and below.

I think I have sorted most of the issues with the roof - however i could do with some advice on what to do with the walls and floor.

The walls are conctete blocks that have been bolted together and then the gaps filled with sealant. This is now coming away and leaking in places. Can anybody recommend a good quality sealant that I can use to replace the existing stufff?

With regard to the floor, there is water starting to seap through where the wall joins the concrete base. I was thinking of trying to prevent this with a product like Evo-Stik Prufe It. Is this any good or can anyone recommend anything else?

You'll struggle sealing the walls.

I bought a sectional concrete garage a few years back from a firm called sturdy. They supplied contractors to erect the garage and they never even sealed between the sections and so it p!ssed in

I had to remove the sections one by one and seal them all with silicone. Then I drilled a series of holes along the floor near the panels and then any water that did get in would drain out again. The holes were on a sutiable angle, so that the water drained out of holes in the concrete slab. I also cut a channel under the door using a 9 inch angle grinder and drilled holes in that, so that water would not blow under the door

You might be able to seal it on a dry day, but the weather has not been suitable for doing this type of thing.

I'd just use any kind of silicone to be honest as you will need quite a lot.

I had the same problems with my Marley garage, I sealed the sections with Everbuild 450 builders silicone, (after raking out the old filler which looked like strong cement), you need alot though. I sealed the walls to the floor with a concrete flauching, bonded with SBR, I also installed guttering, which helps, as there is less water dripping down the sides, and I also had to fix a piece of aluminum to the bottom of the door as water was also running in underneath. Its been dry now for a few years.