T7 beach multivan creaking

[gmancaliman21]

Purchased 2 months ago and driven home approx 60 miles. Started with a small creak somewhere occasionally on a journey. This is now almost constant except on a motorway. It seems to come from the rear of the vehicle possibly the roof. It is booked in to have this investigated and hopefully fixed because it is intolerable. Has anyone else experienced the same and resolved the issue.

 

[sticky1]

I haven’t noticed on mine but this is where you need someone in the back pushing on every panel or just feeling to see if they can find it.
I had a similar issue with a coach built motorhome, which turned out to be the waste water tank resonating through the plastic pipes and the sink acting as a giant speaker.