Building a shed using Prefabricated House Panels

[Deluks]

6" footing with a 4" base sounds like they are implying a concrete slab that's thickened at the edges, not as straightforward for a noob such as yourself (your words!) but I'm sure you'll manage it.

~quick google~ the pics will explain it.

http://www.oldhouseweb.com/how-to-advice/concrete-floor-slabs-on-ground.shtml

http://www.builderbill-diy-help.com/formwork-step.html

http://www.familyhandyman.com/DIY-P...te/form-and-pour-a-concrete-slab/Step-By-Step

 

[JakCal]

Thanks for the links, had a read.

I actually thought the supplier was concurring with what you had said in your 2nd post regarding a filled trench foundation and pouring the floor after. His suggestion looks much more complicated than either of yours, so I'll stick with your suggestion on a basic slab foundation - simpler the better as we are all agreed I'm a noob.


Ok, to make sure I understand for basic slab foundation, presuming I need sand:

>Shutter
>100mm hardcore (do I dig down 100mm so that the top of the hardcore is level with the ground or level with the sand?)
>Compact with a whacker
>Sand (if so how thick and do I whacker this down as well?)
>Is this when I lay the vapour barrier?
>Lay rebar
>Pour concrete to a thickness of 150mm

The part of the base that is against the house, do I shutter as well. If so any tips for removing the shuttering after or do I just leave it in place.

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I've also realised that I've neglected to mention that we do have a drainage problem where the south of the shed is going to be situated. I don't know if this makes a difference, but thought it might be worth mentioning.

I appreciate the time you and others have taken to answer my questions (I'm sure at times I've come across as quite thick).

 

[Deluks]

Your damp proof membrane won't work in that pic because the edges of the slab are exposed, plus water can run under the membrane.

You just confessed to having a drainage problem, plus you want the shed level with the deck, so you'd be smart to raise it all up. This may mean more hardcore cos you'll need to remove the top layer of soil before placing it.

What is your preferred choice of floor surface? If you are after solid concrete then this is where a brick wall around the edge comes in handy, you'd be able to run your dpm up the inside of the brickwork, sitting on top, then your structure sits on this.

This takes us back to square one, build brickwork, lay dpm down inside as if you were making a pond. Then pour 4" concrete in the middle, the brickwork then becomes your shuttering.

Brickwork needs a foundation beneath. Go outside dig a hole 12" deep, let us know whats down there.

 

[JakCal]

Your damp proof membrane won't work in that pic because the edges of the slab are exposed, plus water can run under the membrane.

You just confessed to having a drainage problem, plus you want the shed level with the deck, so you'd be smart to raise it all up. This may mean more hardcore cos you'll need to remove the top layer of soil before placing it.

More hardcore ok, so would that mean I dig deeper to allow for that or same depth and just add more?

What is your preferred choice of floor surface? If you are after solid concrete then this is where a brick wall around the edge comes in handy, you'd be able to run your dpm up the inside of the brickwork, sitting on top, then your structure sits on this.

Concrete would be my preferred choice.

This takes us back to square one, build brickwork, lay dpm down inside as if you were making a pond. Then pour 4" concrete in the middle, the brickwork then becomes your shuttering.

Brickwork needs a foundation beneath. Go outside dig a hole 12" deep, let us know whats down there.

Ok, Picture below would probably describe it better than I could:

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