Real cedar shingles and shakes are perennial favorites for both roofs and walls because of their natural, rustic appearance. Shingles, the thinner of the two, have smooth, sawn surfaces.

Shakes are thicker and may be either sawn or hand-split for a more rugged appearance. Shingles are expected to last from 15 to 25 years, and shakes can last up to 50 years.

In fire-prone areas, wood shingles and shakes may require pressure-treatment with fire retardant or may be forbidden entirely.

In humid climates, where fungus and mildew can be a problem, wood roofs should be treated with a fungicide after the first year (you can also buy types pretreated with preservatives).

Fancy-cut wood shingles are available in a variety of shapes, including fish-scale, cove, and V-cut patterns. When used selectively, these can bring a sense of style and detailing to wood-shingled walls.

Wood shingles and some wood shake roofs require open sheathing: 1 by 6 boards that are spaced apart. The spaces allow air to circulate around shingles to prevent moisture buildup underneath the wood.

Wood shakes, with deeply grooved textures that allow for air circulation may be applied over solid sheathing with interlays of 30-pound roofing felt.