Rubber seal inside , remove it and allows beading to be taken off depends on Windows though

 

Seen one of those where the fitter put the beading on the outside... oh dear...

 

Original upvc windows were made/designed with the beading external, i suppose it was easier for the fitters.

Then after a few years mr burglar realised the beading could be removed and then sealed unit removed.

But by then, thousands, if not millions of windows had been installed.

all windows were externally glazed, but wood ones used putty etc. My wood ones are externally glazed and beaded but they are from 1901

 from 1901

when buildings were built to last by skilled craftsmen

yep

yep

i lived in a village that was old stone built houses of varying sizes built in mid 1800-early 1900's best made best looking proper sized rooms etc,mine on an estate in mid 80's **** walls small rooms even the **** upvc windows and doors fitted about 10 yrs ago ive replaced every handle and lock due to failures and i replaced those from wood which bar the odd sand down and re varnish were way better in hindsight

This was on a late 1990s house but we believe the lounge window was a diy / **** replacement as all the others had internal plastic beading