Hello everyone. I'm new to this (though have been following the site – and readers sheds – for a little while) and am about to embark on a shed building mission. I am going to build a 10 x 16 shed in my garden. I am going to use 2 x 6 floor joists, 18mm ply on top of that, 18mm ply exterior walls, 2" poly for insulation, then probably 9mm MDF (maybe ply, but MDF will leave a nicer finish I think) for interior walls. Roof will probably be 12mm ply so its a bit lighter. The frame is going to 3x2.

However, I am unsure how I am going to set the floor down. Its big, so I understand that just sticking bearers down might not be good enough. I don't particularly want to use a concrete base because I live in London and frankly I think there's enough concrete in London. So, are paving slabs my best way to go or is there an alternative? I guess at the most I could concrete in some posts so I'm not using much concrete. Oh, and the ground its going on is currently a grassy bit of garden.

Thanks in advance. I'm hoping building will start next month, I'll post pics when its all done…

Hi greg, I'm soon to be embarking on a similar project (4x3m shed, 6x2 joists, 3x2 frame) and I'm using concrete blocks as pier foundations, (six piers, 3 at each side). I'm unsure of what to use for the roof. Corrugated bituminous sheets seem like the cheapest but can be prone to condensation – not good for a wood floor. Because of the dimensions I'd have a lot of waste if I used supershedfelt (8x1m rolls). Any ideas would be appreciated.

Hi guys, thanks for the response… I didn't get any alerts so I've only just seen them! I opted for paving slabs with bricks on top for the very base. It seems really solid and was surprisingly quick and easy to level too! You can follow my progress as I've only just started to building it.

To keep costs down I've opted for OSB3 for the walls (exterior, floor and roof) so hopefully they'll be fine… after several coats of some kind of hardcore water resistant paint.

I haven't actually looked at the roof yet Ian! I've noticed that my neighbours have used the rolls and cut them into strips, looks fine, but then no good if there's lots of wasteage. I'll be doing that (hopefully) next week so I'll post back to let you know how I get on!

In the meantime search for 'Fort Cox' under workshop sheds in readersheds and find my 'pictures in progress'…

Greg