Installation/cost of Mexican roof tiles

Been searching the internet to no avail trying to get an idea of cost of installing Mexican clay roof tiles and on how they are installed. What kind of underlayment to use, weight load, roof pitch, upkeep problems, etc.
Also, what imitations might be available. Met Tile has steel roofing panels that look pretty good.
Can anyone help here?
PlaneWood by Mike_in_Katy (maker of fine sawdust!)
PlaneWood
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Are you talking asbout Mission tiles or barrell tiles? They are very heavy. Theoretically you can get by with skip sheathing like for a wood shingle roof. There are no real upkeep issues, as long as you don't walk on the tiles ... they are fragile.
Is this for an existing structure? If it was not designed for a tile roof, then the framing is probably way too light. If you have a metal tile you like, that would be the way to go in a re-roof situation.
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
Try this site
http://www.ludowici.com/
Contact a rep inside their company and request information. i have found them to be helpfull.
Nice site.
No slope less than 3/12, most have a recommended slope of at least 5/12. Weight from 600 to 1900 lbs/sq. Imagine toting those tiles up a ladder.
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
You can look at redland clay tile as well, http://www.redlandclaytile.com/
they have really good tiles. I'm in the process of building a mexican/mission style home using their junipero tiles. If you call them up they are pretty darn helpful.
in the northeast, you are looking at over $1000 per square installed, easily, assuming that the tile costs $350 per square.
i saw a Ludowici tile that was custom made to match an old tile that was out of production recently the material alone was $3000 to $5000 per square.
carpenter in transition
I tore off a 1926 tile roof in LA. The were over tar paper and solid sawn sheathing. The tiles were nailed thru holes in them with galvanized 6d's. Somehow there must have been some kind of constant small movement, like from expansion and contraction, because the tar paper was worn thru where it had been in compression between the tile and the wood. It didn't leak bad enough to drip into the house, but the wood was termite eaten on top, indicating that it had a constant moisture supply. Everything looked good from the attic side, but it wasn't.
Weight is a bad thing in earthquake country, and especially bad if it's up high. So, I'd never put tile on a house here.
-- J.S.