Probase shed base (http://www.shedbase.com/probase/)

[Satsuma]

Has anyone heard of/used this? http://www.shedbase.com/probase/

I love the idea and concept, and vastly prefer it to the traditional concrete base (for a new shed). But would it work on clay soil that is prone to waterlogging?

The plan is to double the footprint of the existing shed.

The non-shedded half was prone to standing water in heavy rain, but which I "fixed" by laying in a good half-ton or so of gravel on it.

The shedded half has sat on (I assume) a concrete base for 10yrs+ with no issues (I assume there was the same water table but it's never affected the shed - even though I have no great confidence in the builders having laid a proper hardcore base underneath that either!). My worry is that doubling the expanse of concrete could just make the water issue worse behind the shed, where we won't have viability or access, mainly. But would the Probase approach help alleviate that or worsen it or what?

The new structure won't be excessively loaded with stuff and any weight would be fairly evenly spread.

Thoughts and comments most appreciated. I will x-post to the gardening board in case anyone's had the issue there already.

TIA
Sats

[sg31]

It appears to be an interesting idea. Similar systems have been around for a while although I've had no experience of them.

Looking at the video they make a point of how important it is to level the ground before laying the plastic units. That's fine but if I was doing that I would just put concrete slabs on the levelled and compacted base then put the shed on timber bearers over the slabs. The slabs are heavy but so is all the gravel you need for the plastic base.

My own soil is moderate clay and areas do collect water in heavy rain but the combination of slabs and timber bearers would lift the shed base above any standing water.

I'm not convince there is much advantage to this system in most situations but I always try to keep an open mind. It will be interesting to see if any other Lemon Fools have tried these systems. I'm happy to be converted if it will save me work.

[redsturgeon]

I'd have to agree with sg31 on this.

John

[vrdiver]

We have a large shed on a concrete base on land that gets quite waterlogged. The shed floor used to get flooded, but after installing a french drain alongside, the problem has never returned.

VRD

[supremetwo]

I'd have to agree with sg31 on this.John

Ditto re. slabs/bearers.

That's how our summer house is done.

Make sure the wood is treated.

[Satsuma]

Many thanks for the replies. It seems like concrete is still the best way forward (dammit ).

We may be able to run a French drain along the rear of the shed, by bringing everything forward a little, but there isn't much room. This is being squeezed in as it is.

Looks like I need to do some more thinking....

Thanks again
Sats