[GillyHen]

Does it matter what you use as a coldframe light? Is the heavier the better i.e. double glazed glass panels  Or will a single/double layer of perspex suffice? I have a wooden base to use.

[philskin]

personally i would use glass to give it more strength ,but that is only my opinion 

[noshed]

Use anything to hand - old window, bit of perspex. It doesn't reallly matter. Just make sure any glass is secured - hinge, brick etc, to stop it blowing off and breaking.

[David.]

if you're going for twin wall polycarbonate sheeting, the translucent stuff from Wickes used to cost a fraction of what they charged for the clear stuff.

Better still, keep an eye out on freecycle for carports and conservatories being dismantled.

[digalotty]

although glass is a good material for a cold frame its not a good material to have on the lotty

[GillyHen]

tell me about it, I have a hardstanding area which obviously had a greenhouse upon it once upon a time! Handpicking hundreds of pieces of glass of many different sizes out of the ground... luvverly