Multi wall poly carbonate on greenhouse

Hi everyone. I'm looking for some advice from you lovely people (again)
I have just put together a second hand aluminium greenhouse frame that I picked up at a reasonable price. And now I need to glaze it.

I have sourced a company that supply multi wall polycarbonate and cut it to size. The main question I have is about the direction of the lines / tubes ( I'm sure there is a technical term) do these have to run vertically. Is there any major dissatvantage in running them horizontally. I will be able get a lot more cut from the sheet this way.

For the same price I can get 4mm running vertically or 6mm running horizontally.

Thanks

Tommy


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I have twin wall polycard in parts of my greenhouse , I have them running vertically 4mm, I'm not sure you would be able to fit 6mm if your using glazing clips.

 

Cheers for reply Ian. How do you find the 4mm. Is it reasonably sturdy. Does the poly block out much light.


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I find it ok but my garden is quite sheltered, I put the polycard on the shady side of my greenhouse and the rest is glass, so can't really answer your question but it does ok for me.

 

Should be fine with the tubes going horizontal. Might be an idea to tape the ends, stops insects getting in and leaving a mess.

 

Brill cheers lads. I'll soon be up and running.


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I have a greenhouse which was all twinwall polycarb and the tubes run up and down. The reason I believe they are done this way is because when sliding them into the frame, they do not bend going up and down but would most likely be a pain to put in sideways. Taping the ends would also be a good idea as @Zigs suggested. I have replaced all of my panels with clear single polycarb but only for cosmetic reasons. Oh, forgot to mention, there was plenty of light coming through with the twinwall.

 

Cheers Lori


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That's a good point about bending. Did you silicon yours in


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I would have the tubes running vertically as if any water/condension that may get in can run out the bottom

 

Mine aren't siliconed in, held in by glazing clips

 

No, the channels on my Palram hold the panels very tightly. They don't use clips at all. I did at one time silicone the bottom of the panes because the base channels are slightly larger and I wanted to stop air flowing freely - the silicone was not needed to hold in the panels themselves.

 

Well I just ordered it. Roll on Thursday for delivery. I ordered the majority with the flutes running vertically but with the size of the sheets I had to order some panels with horizontal flutes. Can't wait to get it up. I have the frame up for nearly a week looking at me teasing me !!! Going to run a power lead from the house this weekend and I'll be ready for off [emoji1][emoji1][emoji1]


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It`s a pity you didn`t let us know you were glazing with polycarb BEFORE placing the order. I use a company which sells packs of 10 4ft x 2ft 4mm twinwall polycarb for about £30 plus delivery.

 

Thanks @daitheplant. It's done now. I'm in ireland so they may not have been able to deliver. The sheets for mine were 700mm which is kind of unusual too.