Black mould on roof boards in loft

[Burnerman]

I think you are better off with the jubilee clips really - you wont burst the hose, but if you overdo it you may crack the plastic flange the hose pushes on to.....you can't win!
The cable tie is fine in easy conditions, but you won't get as much purchase with that.
Do keep an eye on it!
John

 

[emmaamme]

Fab John. You've been a great help. Thanks again and don't worry - i won't take my eye off the ball this time! I'll be checking it regularly.