Double layer poly

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Graventown Gree...
Graventown Greenhouse's picture
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Joined: 12/17/2009
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How much slack is needed on the second layer of poly so that it'll inflate properly ?

The first year on my 16' x 28', we didn't install 2 layers. The second layer was just added. The blower hasn't been installed yet, and if we need to loosen the top layer some more once we do get the blower in, that won't be a problem. I was just curious if there's a "standard" amount of slack.

Thanks for any help !

Paula, OwnerGraveltown GreenhouseLewisburg, KY

drewlandis
drewlandis's picture
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Joined: 04/24/2009
When we install them we pull

When we install them we pull them pretty tight. There's always going to be some slack in the second sheet, and it's usually more than enough to inflate properly.

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