Music Lover
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
I'm not hampered by a lot of data, just stuff like this: https://www.roofcalc.org/why-roofing-prices-keep-going-up/
But you might know the answer to another question I have had: Are lumber prices very high in Canada too? I've wondered whether the US prices are partially due to border slowdowns/blockages and the fighting there has been over Canada supposedly dumping softwood lumber to the US.
Lumber prices are ridiculously high in Canada. A 4' x 8' sheet of 3/4" plywood is $84 last time I looked. An 8' PT 2" x 4" is now $13.45, was about $8 last year. A regular 12' 2" x 8" is $27.
Timberline architectural shingles are $28.27 a bundle, the same as last year. 3 bundles cover 100 sq ft, so a 1500 ft roof needs 45 bundles which is about $1500 after tax. $100 a sq ft.
The link you posted includes labour...I don't see any reason why it should go up a lot, roof replacements are a regular and predictable event and should be unaffected by lumber shortages. But I'm not a roofer, just a DIYer with no inside knowledge.