Flag stones on to grass area

I have some flag stones that I want to lay in the back corner of my garden to use as a concrete base for a wendy house. I am going to lift all the grass at the weekend and was planning on just flattening the soil then laying them on top but on searching for tips, i've been scared off this method due to movement when raining etc...

So, some sites say use sharp sand then some polythene liner to put the flags on, others say use cement and then sand.

Could someone please tell me the simplest way to do this that doesnt involve renting cement mixers and huge rubber mallets which I would be able to do single handedly in one day.

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Posts

  • nutcutletnutcutlet Posts: 24,230

    sand is good, allows for a bit of movement and no cracking.

     

  • so go with the sand and liner method do you think?

  • nutcutletnutcutlet Posts: 24,230

    i wouldn't use polythene inside or out of the greenhouse. You have to water and it needs somewhere to drain away. you could use a weedproof membrane that lets the water through

  • its a wendy house, not a green house, just like a big shed.

  • FairygirlFairygirl Posts: 19,713

    Are you on clay ade? If so you might be better putting a blob of mortar at the corner of each flag plus one in the middle, and then laying them directly onto the ground you've compacted. If it's a big wendy house you may need a bit more of a base first too - ie a few inches of compacted hard core. It really depends on the overall weight.

  • nutcutletnutcutlet Posts: 24,230
    adejones wrote (see)

    its a wendy house, not a green house, just like a big shed.

     

    my one track mind ade.  'house' must be preceded by 'green'image

  • Don't think it is clay no just grass then inches of soil...

    Not too sure on the size of it but i think its around 2 metres squared, so quite big.

    Will see what the ground is like when I lift the grass and then decide if i need cement or just a few inches of sharp sand.

  • Hi Ade, Can I suggest that you use both. 2M sq is quite big and with youngsters bouncing around in your wendy house this can add to settlement. I would suggest: remove turf, complact ground, lay s/sand, compact, scrape level with long bit of wood, lay slabs, get kids to jump up and down on slabs, check for levelness, if ok build w/house. The better the preparation the longer it will last. Our neighbours built one on soil and thin sand and its frame broke after a year!

  • AtillaAtilla Posts: 1,493
    Chris Trotman wrote (see)

    Hi Ade, Can I suggest that you use both. 2M sq is quite big and with youngsters bouncing around in your wendy house this can add to settlement. I would suggest: remove turf, complact ground, lay s/sand, compact, scrape level with long bit of wood, lay slabs, get kids to jump up and down on slabs, check for levelness, if ok build w/house. The better the preparation the longer it will last.

    Well said - exactly what I was going to write!

  • FairygirlFairygirl Posts: 19,713

    Yes if it's that size - the better the base the better the result. I wouldn't skimp on it!

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