I will hold judgement.
Mobile home roof looks wavy.
When some of the crowns are up and some are down then the roof has a wavy look but it is still structurally sound.
Asphalt shingles are low quality material and have a low quality look.
I have seen roofs look a little wavy from the hooks the roofers slide under the shingles to support the boards to help them stop from sliding off the roof.
When someone walks on the roof the panels deform and have no internal strength to return to their old level which is why the roof looks wavy after the roofers finished.
Not a roofer so not sure what they are called after a couple of sunny days hey flattened back down.
Would like to see a couple of closer up pics of the vent stack.
A bad measurement improperly sized shingle or low quality roof can simply result in an uneven and wavy appearance which essentially means you got a raw deal.
Asphalt shingles are the most likely to be wavy asphalt will curl and warp significantly more than better quality sustainable products.
The carpenter may have failed to put all of the crowns up on site framed roofs.
Damage that leads to wavy roofing had your roof for a while.
This is why working with trusted professionals is so important and why the lowest quote doesn t always mean the best.
When heated by the sun the strip will cause the shingles to lay down and bond together.
Shingles not sealing most asphalt shingles have an adhesive strip.