Tensioning roof membrane

[evo111]

Does anybody have any ideas on how to tension roof membrane from inside the roof space??

I have had an extension built and have used a breathable membrane - but it is quite 'slack' in places. This 'slackness' is causing a lot of noise on windy days as the 'slack' membrane is flapping about !

Is there any ways of tensioning it from the inside??

I dont really want to remove the roof tiles and refit the membrane.

Thanks for any ideas or comments.

 

[datarebal]

it is not supossed to be taught.. if it's the laps flapping then get some lap tape and bond them together.