Sorry Nick the Grief, I didn't mean converting the existing shed to a greenhouse. I must be such a lousy writer to be misinterpreted, sorry I'm not very good at describing technical stuffs clearly.

What I was trying to get at was making a makeshift greenhouse, something like lean-to design on the 20ft wall space of the existing shed. For the cheapest method, I had thought of simply hanging up a big clear plastic cover from the guttering pipe (peg down with clothese pegs??). The actual areas of 'makeshift greenhouse' (1.5 ft gap between shed wall & plastic) would be quite narrow so I was wondering if I could get away with having any frame type of support for the plastic. Of course I should have said so earlier but I was too embarrassed to disclose the somewhat crude nature of my design.

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