MSE method for levelling a shed

dunroving

I have inherited a wooden garden shed with the house I recently purchased. It is pretty sturdy, 1.5M deep and 2.10m wide, with sloping felted roof (slopes from front to back no gutters). No signs of water ingress through the roof.

The shed is leaning forward, due to the base being sloped. The base consists of concrete slabs.

I'm looking for a money-saving method for levelling the shed at least enough where the rainwater doesn't run straight off the back roof onto the back wall of the shed. There are signs inside the shed that the rain has soaked through the wood from about halfway up the back wall (i.e., vertically below the back edge of the sloping roof), down to the ground level, but no signs of rotting at this point.

The shed will likely be moved or removed within a year or two so I don't need a permanent solution, just one that will work and that isn't as much hassle or expense as moving the shed and relaying the concrete slabs..

My current plan is to employ the help of a couple of friends, use either car jacks or some other sort of lever to raise the front of the shed, and put shims under the front of the shed (such as plywood or treated timber running the width of the shed).

I'm currently not planning to put support under the middle of the shed floor but wonder if that is a bad move, e.g., whether the floor might eventually sag or fall through. The floor currently is made of pretty sturdy-looking 10cm wide tongue and groove running from back to front of the shed. The shed is also on 4 lengths of 2x2 wood, running left to right, with one each at the front and back, and two spaced in between.

Hope all that is clear and that there's enough information to elicit some responses. Thanks for any and all!

FreeBear

If you just put packers along the front edge, the floor will sag inside as soon as you put any weight in there. Chances are, the floor timbers will break.

A 6'x4' shed isn't going to be particularly heavy - Get yourself a couple of long lengths of timber, lay them on the ground in front of the shed, and then slide it off the base. Lift the slabs, and relay so that they are level, then slide the shed back. Would also be worth slapping some wood preservative all round while you have good access. Fix a bit of guttering along the back to direct rainwater away - This will stop water splashing down & rotting the timber.

Norman_Castle

For the rain to be dripping halfway up the wall it must be leaning a lot. Lift the front to make it level then you can measure packing for the middle of the shed. You can either add tapering wood to the current runners or wood of the appropriate thickness at 90 degrees to the runners.

getmore4less

Couple of ropes under lift the shed off.

Position packing to make level and support the current bearers are.
Or level the slabs.

Lift shed back.