Concrete to raise shed floor

rock22

I have just installed a steel garden shed. it is bolted down to a concrete base.

The problem is that any rain that gets in at gaps between the base and sides then sits on the floor , making it really unsuitable for storage.

i was thinking of raising the floor an inch or so with the idea that rain would not flow upwards but instead would flow out from the shed to the outside.

Would there be a problem pouring concrete inside a steel shed , with little ventilation other than one door. Shed is 2m x 2.5x approximately. WOuld the concrete set and would the moisture from the concrete cause damage to the steel ?

thanks

hayse

It’s a common solution to your problem pouring a finish floor like that. Get the mixer out.

sflandango

That's how it's done mate. A sheet of polythene on the floor and returned up the walls. Keep it neat into the corners and leave it run up the walls about a metre and tape it up while pouring the concrete. This will keep concrete splashes from sticking to your walls. I guess the steel frame of the shed is 50x50mm box so you'll just put in 50mm of concrete and screed off the steel at the bottoms of the walls. Then, when the concrete is gone off, you cut the plastic back down to floor level. I have done exactly this in a steel tech shed and it is bone dry. It's how steel tech recommend it is done and I think they have a guide on their website. It is a straightforward and effective fix. 2 x 2 x .05m = .2 m3 of concrete. It's only a couple of gauges of stuff. Or you could mix it with a shovel handy enough. Best of luck.