Fiber cement averages about $1.70 per square foot and is practically indestructible. Sources: SPG Marketing, R. S. Means, National Home Improvement Estimator
Wood: Prized by traditionalists, it's lightweight and easy to cut and work but vulnerable to rot, insects, fire, and splitting. Individual shingles are time-consuming to install and maintain. Expensive.
Clapboards average $4.70 per square foot; shingles, about $7.50