Labels:bulletin board | dialog box | sky | window OCR: Roofing eights Asphalt/ Fiberglass Up to 3 lavers allowed in shingles 235# 450# most jurisdictions Wood Shakes 400# Metal roof overlays Clay tile 800# 1200# No overlays Concrete tile 900# No overlays 1100# Lightweight tile 560# No overlays 730# Most areas allow for two layers of asphalt shingles or a total weight of approximately 700# per square. Concrete roof tile noted averages approximately 1.000# per square. This difference IS misunderstood by most designers in emer oino concrete roof tile markets. Corrective structural requirements are usually minor 55 Weights emerging
