By Steveg1966
West Yorkshire,
United Kingdom 
We have started to dismantle some old chicken coops on the allotment and I have got some marine plywood sheets that I am thinking of using as a flooring for my greenhouse and part of my polytunnel as I think it would make a great weed barrier along with some membrane that is used as a barrier for concrete flags any thought on this would be much appreciated.
10 Jan, 2013
Answers
I'd also think they would be quite slippy underfoot too.
10 Jan, 2013
Hi Bulbaholic
I can think of a few good uses off the allotment but I do not want to take it off the allotment because its frowned upon when materials that are offered free for use on the allotment.
Steve
10 Jan, 2013
Then offer them to someone else on the allotment then they can stay in house as it were.
10 Jan, 2013
ply will delaminate with the wet and as said be slippery . put it on brick it will last longer but it makes a great home for unwanted animals .
11 Jan, 2013
Valuable material that will rot in a year or two with that use. Can't you think of anything better, Steve? Give the sheets air exposure on each face and they will last for years to come.
10 Jan, 2013