advice on building a shed

[seneca]

I have come across a few websites about shed building and they all say use CLS timber. What is this? Can anyone expalin the differences between: kiiln dried softwood, the heavy, pressure treated wood (light greenish in colour and is often kept ouside in places like Wickes) and CLS. I'm trying to calculate the amount of wood needed for the frame, and was wondering which to go for. Any help would be appreciated.

Also, My shed is going in the corner of a garden and I figured out that two walls won't be visible. Well (and no I'm not leaving them out to save money..... though it did cross my mind!) I was thinking of using some kind of exterior grade plywood. Would this work, or would it get soaked. What thickness would be best, and should it be painted or treated with a typical fence preserver- type of stain.

 

[masona]

Also, My shed is going in the corner of a garden and I figured out that two walls won't be visible. Well (and no I'm not leaving them out to save money..... though it did cross my mind!) I was thinking of using some kind of exterior grade plywood. Would this work, or would it get soaked.

Done my back and side wall with precast slabs and bolted them together then timber studwork the rest with cladding in front of summerhouse because there was no way I can get to it for painting etc. Bought the slabs 2nd hand (hairline cracked or slightly damaged corners) for half price, £15 per panel including delivery.

 

[seneca]

precast slabs

do you mean the 2 foot square type used for paving? surely not. how ever would you join them?

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[masona]

About 1.8m x 500mm, also many smaller sizes and corner section

 

[seneca]

impressive.
looks more like a house than a shed. Is it habitable.... or for rent

 

[masona]

Not mine, my summerhouse is a little bit bigger

The back and side are precast slabs which you cannot see, then I put timber log cladding on front and the side you can see so it look like a shed