david
THIS ONLY APPLIES IF ITS UPVC REPLACEMENT WINDOWS, if they are built into the house when new, its not this easy
its not a big job, its a 2 hour job max
I speak as a carpenter who worked for a few years for the MOD, and when the familys would move from GERMAN homes they would have BIG massive sofa's etc, and we would have to take the front window out
it really is a fairly easy job for 2 people, Get a stanley knife, cut the Silicone outside, open the windows and unscrew the screws holding it in, now get your stanley knife and cut the sealant around the inside of the window, then get a Bit of timber and a lump hammer and tap the frame in each corner till it starts to move
IF the window has a big pain of glass in the middle, its better to take that out, just pop the beads out
then unscrew the sill and change it
2 blokes, 2 hours and a length of sill ( pop and ask a local UPVC window installer for the length you need)