how to join polycarbonate sheets?!?!

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I've started a project of making greenhouse but being an amateur in DIY, I was looking for help on how to join the sheets together? Glue is not an option but is there some sort of "fitting strips" a bit like laminate flooring?
if so please let me know!
thank you
 
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You usually buy galzing bars for twinwall polycarbonate. How thick is the poly and where exactly are you doing the joins?
 
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Instead of a thick glazing bar you could use plastic H-section running a bead of glazing silicone along the section before you slide the poly into it. Proper glazing bars are better though.

White%20Joint%20H%20Section.jpg
 
you will need intermediate support for the poly without proper bars at at least 2 points along the 2.5m length and maybe only 1 with proper bars but you need to consult the manufacturers requirements and off course the good advice from people here :D
 
You need to make sure you use a silicone that is suitable for use with Polycarbonate, not all are.
There is a product called fixall, which will stick and seal if you choose to go with the cheaper H section rather than a proper glazing bar.
 
You need to make sure you use a silicone that is suitable for use with Polycarbonate, not all are.
There is a product called fixall, which will stick and seal if you choose to go with the cheaper H section rather than a proper glazing bar.

Our Ford transit bumper is stuck on with fixall. It's blimmin' marvellous aint it?
 

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