I'd get in touch with the company who did it.
Have you got pics? Maybe someone could suggest some ways to fix it up
What kind of roof is it?
How big is the roof? Is it one sheet of plastic of multiples?
It's possible it just needs a few supports underneath which shouldn't be too difficult.
I'm not entirely sure what you mean either :wave:
I do get a bit of leakage in my aviary roof, but not enough to be a problem.
If the water is pooling, you might need to slope it more?
How have you fitted the corrugated sheets to the wooden batons? If you've screwed/nailed through the lowest point of the channel, you'll get more leakage than if you go through the highest part...if that makes sense?
Try to get some pics of where it's sagging and where it's leaking. Looks like you did a pretty good job of supporting it so perhaps being at more of an angle would help the water to run off.
With the correct fixings you fix the plastic at the highest point and there's a cap on top that keeps it waterproof - I wouldn't have thought that would cause the sagging you're getting though, although it could contribute.
Another thing you could do is cut baton to fit between the supports you have and attach it where the sagging is.
The best thing for that would probably be those bits of metal with a hole in each end for a screw. Screw one end in to the supports you have in place and the other end in to the new supports.
Any of that make sense?:lol:
It made sense up until the bold bit :lol:
Ah yes, that's a bit of a problem. Really you want the support timbers running in the other direction, but your run is too huge, you can't easily get 12ft timbers!