What types of metals are used on roofs?

Question

What types are metals are used when building rooves on houses? [website if you can =)]

Answer 1

There are 3 main metals used for rooves for buildings:

1) Steel - this is the main one as it is relatively cheap, strong and can be easily coated and maintained for corrosion resistance.

1a) Stainless steel - more expensive but doesn't need coating (but still needs cleaning).

2) Aluminium - less strong (and rigid) than steel, slightly more expensive and higher thermal conductivity.

3) Titanium - used a lot in Japan for roofing as it looks really nice, does not corrode and is strong.

Websites to look at would be:

The Steel Construction Institute

BSSA

Corus Construction

Titanium Information Group

Japanese Titanium Society