Garden shed on concrete block

Goldorak

Goldorak

Goldorak

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Joined
12 May 2022
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11
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South East
Hi,

New member - first post - Hello everyone.

There is a thick and strong concrete base in the garden, on which there used to be a shed, we moved the shed when we moved in.
Now considering putting a new 8x6 shed on the base again THIS ONE

The concrete base is level, however it is rough finish, if that is the correct teminology (like bad skin), with water standing in the troughs that are about 5 ml deep.
I am wondering if that could be an issue with rain water sitting underneath the shed - The base is a about 4 inches wider and 4 inches longer than the shed.
The base is in a corner, along a high wall (south) and a fence (east). So the exposed sides will be north east.

Do i need to worry about potential water sitting underneath? If so, I was thinking maybe slightly spaced out flags between shed and slab. Thoughts?
Also, the shed being slightly smaller that the base, should i position the shed bang in the middle or right along a corner?

Cheers.
 
You are correct that you don't want it sitting in water. Flags would work or build a sub frame and seal it to the slap with a mortar fillet to stop water getting underneath.

The shed however looks horrifically expensive. I brought mine from Tiger Sheds.

https://www.tigersheds.com/product/tigerflex-shiplap-apex-shed/

If its a decent concrete base do you even need a floor? Just build it on the concrete and seal the walls to the concrete base.
 
I'd definitely go down the tiger sheds route, far better built.

Ideally you don't want the base to be bigger than the shed else water will land on the base then run underneath. To fix that you just need to raise the shed off the slab. One option is to use 6ft lintels lay flat on the slab, or you can use 6ft lengths of timber that are treated and accept you might need to replace them every 5-10 years.
 
Abyss said:
I'd definitely go down the tiger sheds route, far better built.

Ideally you don't want the base to be bigger than the shed else water will land on the base then run underneath. To fix that you just need to raise the shed off the slab. One option is to use 6ft lintels lay flat on the slab, or you can use 6ft lengths of timber that are treated and accept you might need to replace them every 5-10 years.
Click to expand...

I got one recently, but it's hardly the bee all and end all of shed tbh
 
I bought an 8 x 6' tigex flex shed for several hundred £ less than the Argos one.
You could get some concrete pads or use 6' concrete gravel boards. Definitely a good idea to raise it up off the concrete pad.
 
Hi, I thought I'd signup to suggest you look for a local shed makers. They will knock you up a much stronger shed (At the least 3x2 treated timber, 16mm cladding). They staple a damp proof course to the bottom of the frame. Unfortunately their books will be quite full atm, but they often get people cancelling or changing projects but they have already built the frames. The B&Q shed at over £1k is overpriced. Go give one a shake in store (34mm framing is very poor but typical for the big diy stores)

Also have you thought about building or buying a "Lean-to" shed and placing it against the wall? Basically a pent roof (sloping only one way) but using the wall as one side of the shed? You would have more useable space (height). Not as much timber. (cost) Only need to gutter one side (attach it to a waterbutt).
 
I'd drill a few drainage holes through the concrete where the water pools too. Not instead of any of the solutions already posted but just as a backup in case water does get under somehow. A normal hand drill will get through concrete no problem with a masonry drill bit.
 
Cheers
touch said:
I'd drill a few drainage holes through the concrete where the water pools too. Not instead of any of the solutions already posted but just as a backup in case water does get under somehow. A normal hand drill will get through concrete no problem with a masonry drill bit.
Click to expand...
Cheers Touch, i have order this to go between shed and base https://www.thegardenrange.co.uk/p/garden-base/shed-base/shed-base-kit-8ft-x-6ft/
Can withstand 420 tons per square meter - this will defo keep base dry.
Cheers.
 
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