i have 3 failed double glazed units. how do you get the beading out from around the frame . i have tried but i will damage them . is there a special tool you have to use.

bob, March 2009

I have three failed double glazed units. I have removed the outer beading but have found that the glass has been stuck in with silicon. Can you help me with this thank you.

ray, August 2014

in the trade we use a don carlos knife, but a thin strong scraper will do. if internally beaded then tap scraper inbetween bead and frame and push handle of scraper towards frame, n.b. some types of beading are harder to get out and two scrapers may be necessary.
if externally beaded and the window has a gasket (rubber seal) inbetween the frame and the glass, then this has to be removed first. place the scraper inbetween the gasket and the frame and lift out.
from the outside push the glass into the back of the frame and take the beads out. replace the glass then the beads then the gasket.

levilewy, March 2009