Sis-in-law broke a (manky plastic) light switch and bought a nice shiny chrome "flush" switch as a replacement. Connecting the thing up (complete with earth which wasn't there previously) wasn't a problem but after screwing the thing to the wall I found a thin, clear plastic gasket in the packaging. The instructions say this should be fitted between the faceplate and the wall... but why? There's a glued-on foam gasket on the back of the faceplate anyway, so what is the plastic one for?
Any ideas?
Hwyl!
M.