How much should a patch overlap the existing panel on the exterior?

The recommended overlap for a patch on the exterior of a container is crucial for ensuring the integrity and effectiveness of the repair. An overlap of 13 mm (1/2 in) strikes a balance between providing sufficient coverage to reinforce the area being repaired while not being excessive to complicate the repair process.

This specific amount allows the patch to firmly adhere to the existing panel, preventing leaks and ensuring that factors such as weather and operational stresses do not compromise the patched area. Adequate overlap helps in maintaining the container’s structural strength and durability.

Choosing a smaller overlap, like those specified in other options, may not provide enough coverage, which could lead to air or water ingress over time, compromising the overall functionality and safety of the container. An overlap of 15 mm (5/8 in) or 20 mm (3/4 in) might be more than necessary, potentially making the repair more cumbersome and increasing the material costs unnecessarily. The choice of 13 mm (1/2 in) is therefore based on industry standards for effective repair while optimizing the repair material used.