Hi all,

I'm basically planning on buying a shed, and converting it to an office. I know that its likely cheaper to just build the whole thing yourself, but I really am not confident that I could do that, so have decided to go down the conversion route.

I'd like to start with something like this: Suvi 212 Log Cabin - Summerhouses & Log Cabins - Garden Sheds & Buildings -Gardens - Wickes or this: http://www.gardenbuildingsdirect.co....fice-Log-Cabin

Which I'll then insulate, and basically I want the final finish to be plaster-boarded internal walls, with a good thick insulation all around, ad I'll be working in it year-round.

The annoying thing is that pretty much every 'high-street' shed is really awful quality, and very expensive. However at this stage I'm not sure I could undertake a self-designed/self-built one as I have never done anything like this before.

I'm really looking for some advice, mainly for the insulation and damp proofing. From my understanding, if I take a box-standard shed like the one linked to above, is the following correct?

1. Wrap the internal walls , roof and floor in a damp-proof material such as celotex. (How do I go about venting this, and does the air vent just need to go through the celotex, or all the way through the internal plasterboard?)

2. Add battens as you normally would for a wall, get internal wiring in place, so the electrician can then just hook it up to the shed's fuse box (the electrician will be doing all the stuff he has to, but I'd be ok putting the plug sockets in place ready for him)

3. Insulate the walls (at this stage I have no idea what type of insulation I should be using. Advice?

4. Add plasterboards over insulation and fix in place.

5. Roof: Add insulation (again, no idea what type) followed by plasterboards

6. Floor: Add internal batters, with insulation, followed by ply (or should it be mdf?) flooring, which will be covered with laminate at the end.

7. Door: Once the floor has (I assume) been rased due to the internal insulation, I'm guessing a few inches will need lopping off the bottom.

I could have this all majorly wrong so any advice would be appreciated greatly. I've been searching high and low for some decent info, but a lot of the places only cover US sheds, and while there are a few similarities, the construction of them seems very different with a 'farm barn' style that we dont really have in the UK.

Getting back onto the subject of a completely custom / diy one. I think the biggest problems I have is A) the plans and B) the roof. I'd have no idea how to plan it, and I'd be worried that the roof wouldn't be strong enough.