the metal edging on the roof is becoming loose. these are the last part that the rain water flows over before it hits the gutter. It is a poly roof. How may I fix this problem?

Gareth, September 2010

Mine are screwed down with self taps and screw heads coated with mastic or use plastic screw combined ring and caps.
OR
You could try remove them clean the frame sections they sit on and the underside of the sheeting then re-mastic them back on as i suspect this is how they were orginally fitted if they came loose.
Only a guess as I can't see them.

Bob, September 2010