Rubber slate can be a good choice when re-roofing a Victorian. Made from the same material as car bumpers, rubber slate can last up to 100 years. The slates are flexible, pre-drilled, and calibrated. They can be cut with a knife and installed in any weather conditions. Rubber slate is an ideal product for a steep, complex roof with turrets, valleys, and crickets.
For more on roofing, consider: