Fiberglass base shingles are as economical and as easy to use as organic base but they can last five to 10 years longer because they don't absorb water, so they resist warping and cracking better. Wood roofing, although time consuming to install, is naturally beautiful and can give your home a rugged outdoor look. Shingles are usually sawn and have a smooth, finished appearance. Shakes are usually split first and then sawn to a taper on their backs. Because they are split, the face has a rough texture.
Flammability is a big worry.
Fire retardants can help reduce, but do not eliminate, this danger. Untreated wooden shingles are prohibited in certain areas, so check your local building codes. Tile roofing made from clay and concrete is used on many Mediterranean and Spanish-style homes. Your roof framing must be strong enough to support its weight, and shipping costs from a distant manufacturer can make it prohibitively expensive. It also requires strong framing.