- Incorrect installation of step, apron, and counterflashings
- Use of warped slates especially when laid improperly
- Nailing long pieces of metal resulting in stress cracks
- Installing over insufficient substrate (rotted, too thin, poor quality, too much flex, etc.)
- Exposed nails left from roof jacks Use of asphalt and caulks in a way that traps or backs up water flow
- Design for water flow that does not take into consideration settling and movement of building, capillary action, wind, drainage, or ice-damming
- Hairline cracks resulting from excessive traffic during installation
- Wrong type of nail
- Incorrect underlayment installation
You can confidently choose The Durable Slate Company for all your local slate roof repair and installation needs, no matter the building type or size.