I remember our double polycarb came with tear away labels stating only one
side
was UV treated. We had to mark each sheet on the outside. It also said that
the
UV treatment wears off after 10years? So I imagine bleach would not be good.
--
Cheers Wendy

Remove PETERPAN for email reply

dusty wrote:
Rob Halgren wrote in
:

K Barrett wrote:

I use bleach at the rate of 1 tsp per gallon in a hose end sprayer,
wet down the surface I'm trying to clean and then brush it off. On
my twinwall I use a soft cloth, and have had no damage, on teh
walkways and benches and walls I use a plastic scrub brush. Rinse
again with the bleach from the dial n spray and I'm done.


But would you do this on a poly covered house? I don't know if
polyethylene film reacts with bleach or not, or if you could scrub
off any UV inhibitors or other coatings... Just curious. I also
wonder if calcium hypochlorite would work as well as sodium
hypochlorite... Hmmm.... I bet those 'oxy-clean' type cleaners would
work well too, somebody should try that experiment.

I agree that the bleach doesn't seem to harm the orchids in any way.
It has never hurt any of my plants. I've even been known to put some
in my water tank to kill various scummy bits. Cheaper than physan
and probably more effective. I probably wouldn't do that all the
time, but three or four times a year doesn't seem to hurt. I don't
grow pleurothallids...

Rob


Hi Rob
Two things where noted on the greenhouse grade of polyethylene film I
bought;
1. do not clean with soap or detergents
2.Do not abrade (I suppose that means scrub)

I'm guessing the UV treatment is on the surface rather than in the
poly. That seems like a dumb idea to me but then they sell more poly
that way.

Thanks for all the answers
Dusty