Seal strip - 2006 Abbey Spectrum

by Tony
(Essex uk )

Seal strip near back top of van looks tatty after inspection and damp patch on ceiling in bedroom.

Took off strip and could see underneath where the 2 bits of metal meet, resealed and put strip back using correct sealant but am worried it looks vulnerable and why has it been designed this way.

Was thinking of a bigger plastic strip across the roof over the other one would help ?

Re Tony