Ply lining recommendations.

[DigitalM]

My workshop (roughly 3m x 3m0 has 50mm celotex between the uprights and a ventilated airgap between that and the outer wooden cladding. I need to line it now. I've been saving up for it but have just looked at prices and wow, depressing isn't it. I'm keeping moisture down with a dehumidifier very nicely between 50-55%. Anyway, I'd be very interested to hear thoughs on ply type and thickness and where to buy for delivery (I'm in Gloucestershire, but I don't have a vehicle that can fit whole ply sheets). i estiamte I need 12 full sheets for the sides and maybe 5 for the ceiling.

Given the price of ply I'm wondering whetrher to give up all hope of thicker sheets that might help with shelving and just go floor standing shelving. But honestly, I'm a workshop noob and anything anyone cares to throw in about what they have done or would do would be of great interest.

I was originally think of 19mm marine ply for walls (12 of) and maybe 9mm (5 of) for the ceiling but that's over a grand (eek!) wherever I look

 

[Jameshow]

Why Marine ply when hardwood ply is fine?
10mm would probably do too.

Mount your shelves on the studs?

 

[Pedronicus]

My 3m x 5m sized shed is being insulated and lined starting tomorrow, The guys are using 9mm ply for the roof and 12mm ply for the walls,

 

[robgul]

My shed is part-lined with (I think 12mm) OSB which, when I did it, was cheaper than plywood - and I rather like the "texture" of OSB

 

[Fitzroy]

12mm walls 9mm ceiling on 600mm centres. Plenty of online sites, ie MaterialsMarket, offer free delivery and 12x12 + 9x5 is £330 inc delivery.

 

[Fergie 307]

Never can understand ply or OSB. I always use T&G chipboard flooring sheets. You can get moisture resistant or plain. I usually use 18mm but thicker ones are available. Cheaper than ply or OSB and gives a nice flat smooth wall. Just lay them on horizontally and stagger each row like bricks. No worries about exact spacing of the uprights etc. What's not to like.

 

[DigitalM]

Why Marine ply when hardwood ply is fine?
10mm would probably do too.

Mount your shelves on the studs?

The space was a real moisture trap at one point, and even a weather resistant Medite MDF worktop went mouldy (!). It's insulated now, and there's a dehumidifier but I'm concerned that if the dehumidifier was off and I was on holiday or something all that might start up again. Call it an abundance of caution, I was just thinking that in a humid environment the marine ply wouldn't just act as a giant sponge. I'm not expert obviously!

 

[Fergie 307]

Water resistant flooring boards are designed for use in bathrooms. They can withstand water very well. I have a piece that I use to kneel on in the garden etc. Often forget to take it in. Has been sat out in all weathers for a number of years and still pretty good.