It amazes me that people in the US would even consider installing a roof that would only last 20 years.
In the UK, you wouldn't consider reroofing anything that your grandparents remember being installed. Ie. Stuff doesn't get reroofed till it's 100 years old. Even then, you'll normally inspect and only replace the damaged bits.
My 350 year old house still has part of its original roof and slate tiles etc.
I’ve never seen slate roofs in California, so not sure if these are to code here. We looked at metal and other materials, but the problem is the weight is different, so now you are engaging an engineer to evaluate structure, submitting plans, dealing with code updates. Or just new asphalt shingles every 15-20 years. The payoff isn’t there and folks don’t tend to keep houses for generations, unlike in the UK.
I think you may be overestimating the extent to which UK houses are held for "generations.
Because if you're trying to use building materials that the local contractors are not familiar with, you're going to have a bad time.
It sounds odd to my ear to matter-of-factly state that the US is deprived due to being capital-poor.
I mean, I'm not disputing anything specific, but where do middle-class people have better access to consumer finance than the US?
If you'd asked me what single fact represents American homeowners to people interested in economics around the world, I would've guessed it's the access to 30-year fixed rate mortgages.
As far as I know this is a deliberate policy in the US, that has not been emulated by those envious of the American economy, but why I haven't a clue.
In Europe a lot of the government fiscal crises were a result of small countries having to backstop giant cross border banks that happened to be headquartered there, and there is little appetite for tighter fiscal union.
In order to have a better roof, you probably must have a better entire house under it also.
Where I live in Europe, roofs are usually ceramic shingles, which should easily last 50-100 years or more.
Of course, the down side of higher quality building standards is cost. Building a houses here costs a minimum of half-a-million, and quickly hits a million...
A tar roof has an unavoidable time limit on the whole thing.
I've lived various places in the US. With the exception of one older house, the roof trusses were a joke: so-called 2x4's (really much thinner than that), widely spaced, held together with a few nails and little or no cross-bracing. They might theoretically hold up to the weights listed, but I sure wouldn't stand under them during a test.
Where I am now, in Europe, the roof trusses are roughly 6"x10" laminated timber. That will hold a snow load.
As I noted in another comment below, roofing slate is essentially unavailable in the USA due to geology - what does exist is of much lower quality than a good welsh slate. Still, in some ways I agree with you: roofing materials in general in the USA are far less durable those used in the UK and Europe, for reasons that I don't entirely undestand.
That said, it amazes me that huge numbers of people in the UK live in essentially uninsulated and almost uninsulatable buildings. Sure, winters are mild, but anytime you have the heat on in the millions of homes built post-WWII, a huge amount of is just leaking through the brick walls. US stud framed construction has its problems if done carelessly, but it does have the benefit that its easy and obvious to insulate your walls to some degree, and not hard to do it to Passivhaus standards.
That makes sense. Roofs last a pretty long time in the PNW as well, for similar reasons. Mostly we just get rain. Not a lot of particularly hard freezes, our idea of big hail is 1/4 inch, etc. It's pretty routine for a garden variety "25 year roof" to actually do all 25 years, and even 30.
An extension that was done in the 1980s has had to have its roof replaced once already due to what I have to assume was poor workmanship by the builder.
Tile and metal roofs last much longer than asphalt roofs in Florida, and while it's definitely more up front, they're generally more resistant to extreme weather (tiles are very heavy and metal is generally fastened down very well) and may get you an insurance discount. It's also for aesthetic reasons, as tile roofs are a very classic Florida look, and the stereotypical Key West house has a metal roof.
Otherwise I agree with you
I think the biggest difference, though, is that the stereotypical single family US home of the 19th/20th century US expansion is on a large plot of land and has - so far - been one to get remodeled/expanded/revised several times in a hundred years. Houses are generally treated as mutable things, and people also often expect to move within a few decades, spending more to put in something that will hold up a hundred years instead of twenty seems foolhardy to many. If you sell it the buyer will likely want a cosmetic refresh; if you keep it, you likely will too.
For Americans who don't know anything about housing in the UK, there is an interesting article at: https://en.wikipedia.org/wiki/Council_house
Being Wikipedia in 2024, I wouldn't assume it's not all AI hallucinated references, but still, it's interesting.
Where I live we call a century-old home a "tear down" because it's probably in horrible condition. There are a handful in my neighborhood but they get sold at a discount, usually for new construction.
I just sold a century home myself, after my mother passed. There was a little bidding war for it, even in this market. There's a character to the century homes that you cannot get in a new home at anywhere near the same price point.