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by KeithP69689, Jan 3, 2012

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Q: How can I stop water leaking into my metal shed?

I have water seepage in my metal shed - between the base and the concrete slab. I have tried sealing it with sealant and then painting it with bitumen paint. But the problem is still there. Can you please advise me on the action I should take?

Craig Phillips profile image

by Craig Phillips, Feb 1, 2012

A: If your metal (or, even a wooden shed) is sitting directly onto the concrete slab base, you will always get some form of damp or moist developing on the inner walls and floor.

To prevent this, you’ll need to raise the base of shed off the concrete slab by a couple of inches. To do this, you’ll need to carefully lift the shed away from the position - if it’s heavy, get a friend to help and be careful!

Then, layer some timber battens across the concrete slab. These should be lengths of 3 inch by 2inch tantalized timber battens laid 16 inches apart. This will allow air flow to cross below the base of the shed and the concrete slab.

I would also recommend laying a layer of DPC “damp proof course” strip across the tops of the timber slithers, this will stop any damp out of the ground penetrating though the wood and raising into the base of the shed.

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