Shavings can pile up around a hole being drilled, making it hard for you to see what you are doing. To prevent this, push the point of the drill bit through a 4-in. strip of masking tape, then draw the tape up the bit so it will clear the work. Fold the strip lengthwise to bring the sticky sides together. The tape "wings" will act as a fan to clear the surface.
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, predrilled 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.