how to join polycarbonate sheets?!?!

koolkev1 · Posted: Sat Mar 05, 2011 4:28 pm

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

Mw Roofline · Posted: Sat Mar 05, 2011 7:58 pm

You usually buy galzing bars for twinwall polycarbonate. How thick is the poly and where exactly are you doing the joins?

Mw Roofline · Posted: Sat Mar 05, 2011 7:59 pm

glazing*

koolkev1 · Posted: Sat Mar 05, 2011 8:36 pm

they are 10mm depth, 2.5m length, 0.7width
and on the edges?

Mw Roofline · Posted: Sat Mar 05, 2011 9:17 pm

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.

koolkev1 · Posted: Sun Mar 06, 2011 4:20 pm

ohhhh i see

thank you very much!!

big-all · Posted: Sun Mar 06, 2011 11:14 pm

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

hillw · Posted: Mon Mar 07, 2011 12:43 pm

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.

Mw Roofline · Posted: Mon Mar 07, 2011 6:45 pm

hillw wrote:

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?

hillw · Posted: Tue Mar 08, 2011 7:16 am

thats the best use yet of it though!!