That sound is known as roof rumble.
How to quietin a noisy mobile home roof.
Since most re roofs are done where shingles were used previously and often on top of a layer of shingles noise is not going to be an issue.
I have seen many roofs with the screws.
I will tell you how to eliminate them.
Installing a metal roof over a solid deck with a good underlayment like double bubble and with an insulated attic airspace below makes it easy to control the noise.
After moving to a permanent site and set up they can sometimes develop annoying floor squeaks.
Installing an underlayment between the metal roofing and the roof sheathing is a key step to reducing metal roof noise.
This is a step that must be taken during the installation process.
They all had leaks to some degree.
Mobile homes and modular homes are factory built and are built on a steel chassis.
Quick tips for a quiet roof.
It sounds bad but is normal.
The metal sheets which have been used on mobile homes are far far far different than the manufactured metal roofing systems being shown on this website.
Roof noise transmission and control.
How is noise transmitted through building roofs how do we insulate roofs to prevent outside noise or rain hail noise from bothering building occupants roof noises building roof noise transmission.
The wind is making sections of the roof move up and down.
People used to install rumble bolts screws with large washers to try to hold the roof down.
Some homes will make more noise than others.