Modelling question

See pic for better visual understanding!

I have the problem that a part of my mesh behaves as if it was not connected to the rest. But it is the same mesh!

When i select a poly and press ctrl and (+) to grow the selection - only that part of the mesh gets selected and it doesnt grow further than those polys.

Do you know why this is happening?

Thanks you!

Likely because its not connected to the rest of the mesh even though it’s part of the same object/mesh data set.

Try selecting all and then removing doubles.

Thank you Felix