making a shed quick !

I should have though OSB would be dodgy if it gets wet.

Not directly of assistance but in the past I've wondered what happens to the thick plywood that is used to protect the pitch at "stadium" concerts. Somebody somewhere must have a barn full of this stuff.

In the Colonies the material of choice is called T1-11; basically nicely finished ply (Google it!) but I have never seen this in the UK.

Is this wrong ? I'd paint it with an exterior paint.

Simon.

My only practical experience was when I purchased a cheap shed, and the roof was felt covered OSB. Of course dy definition it was probably cheap low grade OSB

Once the felt on one side became leaky that pitch of the roof collapsed under it's own weight...before I'd even noticed there was a problem.

OSB will swell at the edges eventually but with some paint on the edges before you use it and a good soaking once built is should be suitable for the job. I used some as concrete shuttering years ago and it still has not broken down to the extent that I can remove it where it shows!!

Bob

You'd be surprised. I have an old sheet that's been leaning up against the outside of the shed all winter. It's discoloured a little and warped - the latter was remedies by wetting and laying out flat with rocks on top.

I plan to screw it to the side of the shed to block up all the holes!

Cheers

Tim

Good. I'll paint the thing and eventually a membrane and clad I guess. Thing is, how do find OSB cheap but also acceptable quality ? A web search gets 18mm as low as 13 quid a sheet. Is it described as WBP etc ? Simon.

I would question the "waterproof" bit. It's used a lot for shed roofs - with felt over it - but if the felt comes off, it soon goes soggy.

WBP (waterproof and boilproof ply) would be a better bet, but is more expensive. I bought some recently to make a small shed for garden tools, and the cheapest I could find in my part of the country (mid Warwickshire) was just under £15 per sheet (inc VAT) for the 12mm stuff.

Right, so some is good wet, some not. Is it graded in any way ? What do I need to specify in order to get the stuff thats been OK all winter, and not the stuff that collapsed under its own weight on a damp roof ;-) Simon.

Its incomplete - there are several grades of OSB, Those numbered with the higher numbers (e.g. OSB3) being more water resistant than the lower.

I would go for WBP shuttering ply - cheap and waterproof - does not look as pretty as a decent ply, but probably not important if you are cladding it later.

OSB3 as has been mentioned.

see here:

also

If its the water proof stuff you will still be waiting when UseNet has gone. The ordinary osb is not very waterproof IME.

OSB 3 is the most durable. OSB 1 and 2 less durable.

The only way to make a shed quick is to add wheels and a powerful engine to overcome the inevitable wind resistance :-)

Matt

Any good suppliers ? Still seems to be 10 quid a sheet more than OSB. Simon.

I can see OSB 4 on the web, but no suppliers. This is classified as waterproof it seems. Simon.

Best I can suggest is find a local wood shop - you often find the price comes down as the quantity goes up. Last time I bought about 15 sheets of ply for lining the workshop the price ended up being something like

OSB3 will probably do if you can make sure its well painted with something waterproof.

Now thats a thought ! The BCO can chase me down the street. I'll put some wipers on me little window ;-) Simon.

What about corrugated steel like ebay 140401838006

Cheap as chips

....you said you're not bothered about prettyness.

Why not buy a shipping container...?