Chris , not neccaseraly a new carpet!!
A b/w can be streched and refitted after relaxing for a few days, only ever had a problem with one, I could see the potential of this particular carpet, not fixed at all in some places, away from skirting under radiators, doors etc, a chat with custy explaining the hazzards , but insisted i h/w/e .
ok , proviso for problems. and sure enough even the pre spray shrunk it.
she was happy, I suggested a local c/ fitter with a power strecher ,whom she was quite happy to pay and streched and fitted back . with out any problems.
Geoff