St. Louis experiences an average of 30 freeze-thaw cycles each winter. Water infiltrates tile laps, freezes overnight, and expands. This process lifts tiles, cracks underlayment, and damages flashing. Most tile roofing companies install the same system they use in warmer climates. It fails here. We use synthetic underlayment that remains flexible below freezing and install ice and water shield at eaves and valleys. This prevents the ice dam leaks common in St. Louis tile roofs. If your contractor does not mention freeze-thaw protection during your estimate, they do not understand local conditions.
St. Louis enforces the International Residential Code with local amendments. Tile roofs require engineered fastener schedules based on wind zone ratings. Many tile roofing contractors ignore this requirement. We work with city inspectors regularly and understand what passes inspection. If you are in a historic district like Lafayette Square, you face additional requirements from the Cultural Resources Office. We have completed projects under historic preservation review and know how to navigate the approval process. Choosing a local contractor who understands these layers of regulation saves you time and avoids costly rework.