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shed foundations coco 08-18-2007
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Posted by coco on August 18, 2007, 6:45 am
Hi All

I am building foundations out of bricks for a 10'x10' garden shed over
an existing patio. I want the shed to sit one bricks height above the
patio to allow for ventilation. Th patio is not quite level with
about a 2" varience over the 10' of the shed's width. I have started
laying the bricks on their sides, 2 bricks width in 6 lines, and
moving to laying them flat as they go up the slope, leveling with a
dry sand/cement mix.

Does anyone have any advice on doing this. How level is level? Will
the dry mix I am using be secure enough on top of the existing patio?

Any help will be greatly appreciated.

All the best
Colin


Posted by on August 18, 2007, 11:44 am
> Hi All
>
> I am building foundations out of bricks for a 10'x10' garden shed over
> an existing patio. I want the shed to sit one bricks height above the
> patio to allow for ventilation. Th patio is not quite level with
> about a 2" varience over the 10' of the shed's width. I have started
> laying the bricks on their sides, 2 bricks width in 6 lines, and
> moving to laying them flat as they go up the slope, leveling with a
> dry sand/cement mix.
>
> Does anyone have any advice on doing this. How level is level? Will
> the dry mix I am using be secure enough on top of the existing patio?
>
> Any help will be greatly appreciated.
>
> All the best
> Colin

I would be concerned about the lack of a concrete footing on the
patio. If the patio is only 4" thick, the weight of the shed will
most likely crack the patio.


Posted by coco on August 18, 2007, 1:22 pm
The patio is monoblock and so is not even 4" thick. What would you
recommend?



Posted by on August 18, 2007, 2:24 pm
> The patio is monoblock and so is not even 4" thick. What would you
> recommend?

I would probably dig down to the frost line and pour concrete piers.
One at each corner and one at the middle of each wall, eight total.
You can set the height of the piers to allow for the ventilation you
want and set then level. However, that may be more than you want for
the shed. You would need a sill that would handle a 5' span.


Posted by CWatters on August 27, 2007, 4:17 pm

> Hi All
>
> I am building foundations out of bricks for a 10'x10' garden shed over
> an existing patio. I want the shed to sit one bricks height above the
> patio to allow for ventilation. Th patio is not quite level with
> about a 2" varience over the 10' of the shed's width. I have started
> laying the bricks on their sides, 2 bricks width in 6 lines, and
> moving to laying them flat as they go up the slope, leveling with a
> dry sand/cement mix.

You're in the UK right?

Is it "not quite level" because the ground slopes for drainage or because
the patio wasn't laid on a proper base and it's moved?

The normal way would have been to remove the slabs/blocks where the shed is
going and then laying hardcore, formwork and a concrete slab. Gets you a
nice solid rot proof floor as well as foundations. Another less professional
method would have been to construct a platform out of pressure treated
softwood or perhaps old railway sleepers.




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