Front cap seam
Common leak point- What fails
- The joint where the front cap meets the roof takes the most wind load and chassis flex, so its lap sealant cracks and lifts first.
- How to check
- Run a finger along the whole bead. Look for hairline cracks, shrink-back from the edge, gaps or lifted corners.
- Typical fix
- Clean off loose sealant, then run a fresh bead of lap sealant made for your roof material. Use non-sag where the seam turns vertical.
