Roofing Materials	Average Lifespan	Fire Rating	Ease of Maint.	"Walk- Ability"
Wood Roofs ("Treated")
Cedar Shakes (medium .50")	15-20 yrs.	A,B,C	Fair	Fair
Cedar Shakes (medium .50")	25-30 yrs.	A,B,C	Fair	Fair
Cedar Shakes (medium .50")	30-40 yrs.	A,B,C	Fair	Fair
Fiberglass Roofs
3-Tab Strip Shingles	15-25 yrs.	A	Good	Good
Laminated Shingles	25-40+ yrs.	A	Good	Good
Concrete/Clay Tile Roofs
Std. Weight Concrete Tiles	40-50+ yrs.	A	Fair	Poor
Lgt. Weight Concrete Tiles	40-50+ yrs.	A	Fair	Poor
Std. Weight Clay (1 pc.) Tiles	40-50+ yrs.	A	Fair	Poor
Std. Weight Clay (2 pc.) Tiles	50-60+ yrs.	A	Fair	Poor
Lgt. Weight Clay Tiles	40-50+ yrs.	A	Fair	Poor
Lgt. Weight Clay "Shakes"	40-50+ yrs.	A	Fair	Fair
Metal Roofs
Metal Tiles (over wood)	to 50 yrs.	C	Fair	Poor-Fair
Metal Tiles (special underlay)	to 50 yrs.	A,B	Fair	Poor-Fair
Standing Seam Metal Panels	to 50+ yrs.	A	Fair	Fair