whats best to seal the bottom of a shed to concrete

Hi

The shed has no floor so sits directly on the concrete base and I've never been able to successfully seal the bottom of my shed, there'due south always some water that finds it's way underneath. Based on the communication of people working in the DIY stores I've tried an exterior mastic, which seemed to blot the water and turned to glue, and I've tried an exterior silicone which was better just is still allowing water to get through.

Can anyone advise another method that doesn't involve dismantling it and adding a wooden floor?

Black jack and epdm

Ugly but it'll work

No idea equally to the size of your shed, but you could raise information technology high enough for it to sit down course of bedded engineering brick?

You but need to heighten it 100mm so it can sit down on some 4x2 while you lot laid a bedded form of brick.

Y'all demand a hard brick, so it's frost resistant, & unaffected by water absorption, then paint with Black jack.

If you can't exist bothered doing much (i.due east as well lazy) or non too worried. Use clear sticks similar **** "poo" That volition tbh be perfect. pretty much invisible, high force, waterproof and provides a smashing seal in dry out or wet conditions. Otherwise if you can be bothered, equally said raise it up and put a course of blues/applied science brick or similar around.

http://www.screwfix.com/p/evo-stik-...tracking url&gclid=CMuinZXly7oCFZMdtAod3D8A5g



That would absolutely ruin your concrete base/shed if ever dismantled. Not to mention looking naff

Thanks all!

This is the shed - http://www.auchan.fr/jardin/abris-c...in-28mm-courmayeur/achat4/24624/C369142/Liste

It's just under 10m2 and uses 28mm planks then information technology's a fleck heavy to lift without dismantling. Also, I'm pretty sure technology bricks will be difficult to source here as everything is built in heavy physical block or stone.

I was looking at sikaflex or tec7 but I've been told information technology's amend to lift the shed and drop it on a thick dewdrop of the stuff to get a proper seal. I simply want to observe something I tin can run around the lesser and it'southward done if possible. The Evo stick stuff looks like information technology could work.

How is the h2o getting in do you retrieve, is the h2o soaking through the porous concrete, because my silicone seal looks pretty skilful i.e. no gaps. I made certain I ran a wet finger over it to push information technology into whatever gaps.

Best bet is to dismantle information technology and put a form of bricks round and wherever the bearers are, or some treated timber bearers for it to sit on. You tin seal and seal, but both are porous materials so enough water and information technology volition penetrate through causing clammy somewhen if information technology hasn't sealed properly. A shed that price and that big should of been on a decent base raised anyway.

Yeah I idea information technology may come up to that. I may buy the wooden floor that goes with it for effectually €270 and exist done with it. I'thousand a bit cheesed off as if I'd have bought the flooring in the first identify I could've gotten abroad with simply raising information technology up off the floor without the hassle and expense of doing a 14m2 reinforced concrete base on my own in 35C heat... oh well, live and learn!

Does the flooring slab extend past the outside of the shed?

Could yous use a stihl saw and cutting all round shed and knock cut bit of concrete off - then take off bottom board all circular shed - staple some damp proof membrane all round to overlap concrete then put bottom boards back on. Done membrane fleck on few sheds simply never cut base off first as we planned information technology like that.

That looks to expert a shed to leave it.

dave

Non really, the boards all slot onto each other so I'd either have to dismantle it showtime or try and somehow lift information technology and pull the bottom boards off.

I'm resigned to the fact that I'll have to dismantle it, raise information technology upward, buy the floor and put it all back together again :/

Thanks anyway!

Why dismantle it?

Get a auto jack inside the shed at one finish
On summit of that jam a beam of wood between the car jack and apex axle
Jack i end up

Support those two raised corners and repeat for the other end of the shed.

That should give yous enough room to get a DPC and 150mm of brick downwardly.

Brooder- The fashion you just wrote ^ definitely the best way. I know its a pain in the **** simply merely accept your time. Once it'due south done you won't have a problem again with it can exist sure for certain that you volition of sorted the problem. If you lot try jacking it up, yous volition knock everything out of plumb more than likely (especially the doors) and take a chance doing worse damage. Up to yous though

If I was to jack upwardly that shed I would cross batten it first to keep it square - easy job really.

dave

Love excavation up old threads...

Exactly same problem for me.. Taking it down and building a decent 4x2 base of operations on concrete blocks.. Merely style

Well a storm destroyed my shed and the insurance paid united states of america the full amount, so that solved the problem!

Easiest answer to a OcUK thread ever!

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Source: https://forums.overclockers.co.uk/threads/sealing-a-shed-on-a-concrete-base.18554729/

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