Thread: What came first, the shed or the floor

My shed has the slab poured after construction up to the bottom of the ground level galvanised girt. The cladding on the outside then over hangs the top of the slab by about 100 mm. This of course leaves gaps between the girt and the cladding ridges but the reason I did this is I always reckon it's easier to breeze proof these gap than than water proof a ground level edge. I then got some expanding foam filler and filled the gaps between the cladding and the slab.

Hmmm I may just have to go with silicone around the exterior and let the inside breath so as not to retain moisture. Looks like I will need to cut some drainage slots into the slab outside to drain the pooling water away from the walls.

I have waterproofed the shed by removing the cladding and cutting a 30mm channel into the slab. I used sheet galv dropped into this channel and rivited it to the C channel. All joins are sealed with non corrosive silicon and then the cladding reinstalled outside of the galv. Everything is now sealed however the water still pools outside the shed on the slab. I have also used Clark rubbers garage door seals under the roller doors. I still have a major leak with the swinging door but will use a door seal there to stop the rain running down the door and inside.

I am tossing up how to cut channels in the slab to drain the places where the water pools. I don't want to put in the big plastic drains as that would be hard work cutting the slab. I am thinking of just cutting small channels in the slab and maybe putting grates over the concrete channel?? Any ideas?

Could you grind the concrete in the high spots to create some run off? Water will always go to the lowest point.
Good luck.