Re-Glazing with polycarbonate sheets - any advice?

[Paulgul]

I've recently had several panes of glass broken by vandals and have decided to re-glaze half the roof and one side (to start with) with polycarbonate sheet. I've read some posts on this forum and note I should use extra clips and also silicon sealant on the clips.
Is there any extra precautions I could take that may prevent the sheets popping out on windy days
Thanks,
Paul

[Potstubsdustbins]

Paul are you using single sheets or 4mm double glazing sheets.

[Paulgul]

4mm double walled

[Bigmallly]

Most folk on the vine would recommend sealing with silicone. I personally wedged 3 horizontal canes across the panels & worked for me.

[Tomatoe]

Most folk on the vine would recommend sealing with silicone. I personally wedged 3 horizontal canes across the panels & worked for me.

This is exactly what I should have done, might have stopped it being blown down

[Potstubsdustbins]

Personally I would bed it on decent silicone just as you would bed a window on putty.

[chilli_grower]

I have always had problems with roof panes being blown/pushed IN on my polycarb greenhouse.

And when this happens, the wind gets in and then blows the other panes out!

Anyhow - I personally used loads of clips, and then I siliconed over them. This stops them from sliding.

And a few months ago I fitted batten struts to the INSIDE of the roof panes. THus preventing panels getting blown in.

Since doing this we have had extremely high winds here, and I have not had a problem....

[Paulgul]

Ok, thanks for all the replies. I made a start today, decided to use silicon to lay the poly onto and use a lot of clips. I'll also seal the clips with silicon once it's completed.

Paul

[cheapskate chaz]

Just to add to this thread, when using polycarb sheets, it may be wise to seal the ends with greenhouse tape or similar to stop bugs using it as a B&B. I fitted some a few years back and within months, had hundreads of `customers`

chaz

[21up]

Just to add to this thread, when using polycarb sheets, it may be wise to seal the ends with greenhouse tape or similar to stop bugs using it as a B&B. I fitted some a few years back and within months, had hundreads of `customers`

chaz

This is quite true you can get the tape off ebay 2 kinds one for top to let it breath and one for bottom for bugs.
Or other way round

[Bill HH]

The benefit of using an internal batten is that it stops the sheet from bowing/ bending in high winds. Once they bend it makes their length or width smaller. So I would use both silicone and a batten.

[chilli_grower]

THe batten is also useful for tying up big tomato branches!