Roof lines should be arrow straight.
Roof tiles have settled on roof trusses are ok.
This is the first time i have seen the tiles installed on a 2x4 truss roof system 24 oc with osb decking.
I e the original roof was a light wood shingle roof and the new replacement roof is a concrete tile roof weighing 5 or 10 times more than the original roof.
If you can see a dip curve or swag on the peak when standing in the street your roof has a problem.
If the original roof was wood shingles a light weight material and it was replaced with concrete tile a heavy material then the roof may sag or be wavy because it was not structurally designed to carry the heavier load weight.
The weight of these roof tiles brings up another question.
Then the beam or roof may sag.
The trusses will be securely vertically propped prior to being lifted to the roof area.
Mobile crane for the installation of trusses roof ladder fixed scaffold for access.
Cracked or damaged rafters or trusses.
It might be something.
Roof trusses will be delivered to site.
If a roof has been re roofed with heavier roofing material than the original roof was engineered for.
Materials handling storage safety information.
Hammers nails and other hand tools will be.
What causes a sagging roof line.
This is an upscale builder 300k range.
Each time you drill into your roof.
A new roof that is of a heavier material.