I just bought a place that came with an old greenhouse it the

>>1086790
4 1/2 foot X 75 foot roll of 4 gauge vinyl.
$40
You didn't give specific size of structure or orientation.

https://www.amazon.com/Gauge-Clear-Vinyl-54-Inch-25-Yards/dp/B006QMTUPC/ref=sr_1_5?ie=UTF8&qid=1479621290&sr=8-5&keywords=clear+plastic+sheeting

File: clear-plastic-polycarbonate-corrugated-roofing-sheets-swimming.jpg.cf.jpg (19KB, 400x400px) Image search: [Google]

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>>1086801
There's also clear corrugated roofing, but its more expensive.
Anything that will last to a decade+ will be expensive of course.

>>1086801
The walls are just over 8 feet, footing to ridge. It's about 30 feet long. How much is 4 gauge in mil or millimeters? Google just gives me wiring size conversions.

>>1086803
I looked into these and I was unable to find any wide enough to fit on the frame locally. I'll search again online.

>>1086801

Bit if a crap shoot how UV resistant it will be, could be fine, could be crap. Even the good stuff is rated at 4 years life expectancy though.

>>1086801
>>1086803
This is for a greenhouse, you want as much light to get through as possible random translucent plastic will probably be shit.

I thought polycarbonate was cheap, a grand seems a lot. Do it yourself maybe?

Does it have ventilation btw, roof vents and side vents?

>>1086866

Semi-rigid Polycarbonate/Lexan is a pretty expensive plastic. Much more expensive than vinyl or polyethylene on a roll.

A bit of diffusion is good for the plants by the way, though it doesn't look as pretty from the outside.

>>1086868
It's only good for the plants if they don't want full sun or if it gets too hot inside, but you can control shading in a greenhouse quite easily same with tenmperature so I would say you're better off getting as much light as possible.

OP here.

>>1086871
Light isn't that big of a deal, we get plenty of sun all year. The winters get cold and freeze at night, so it's more to keep some heat in to prevent frost damage and keep the rain off my tools.

>>1086866
>Do it yourself maybe?
I don't have the skills to cut plastic or even know what plastic to use. So I'd rather use something off the shelf if I'm going to do it myself.
>Does it have ventilation btw, roof vents and side vents?
There are adjustable louvered vents next to the doors at both ends.

>>1086884

For insulation in winter you need some kind of double glazing. There is bubble wrap with UV stabilizers.

You could put one permanent layer on the outside, and then an extra temporary layer on the inside during winter.

>>1086911

Insulate the floor too BTW.

>>1086884
>>1086911
Bubble wrap definitely works, wouldn't put it outside though, it'll just fall apart.

I presume you're going to heat the greenhouse too?

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>>1086921

There's professional grade used for greenhouses, but it's no cheaper than twin wall polycarbonate.