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While replacing glass in a UPVC door (or window) is something professionals usually do, there may be times when you have to do the job yourself – like over the Christmas break. 
You could do the job yourself provided you can lay your hands on a suitable pane of glass, but do wear gloves and work carefully. At other times it makes far more sense to Find a Window Fitter on Mr-Skill.
- Examine the door frame around the damaged glass to determine from which side it was fitted. One side will have an unbroken line over a strip of rubber. On the other side there will be four pieces of beading that clip in to hold the glass.
- Take up a sharp putty knife or paint scraper and work it under a bottom or a side piece of bead. Hold your other hand out of the way in case the tool slips. Carefully prise out the bottom and side beads, except the top one which will still be holding the glass in place.
Have an assistant hold the glass in the door frame while you take out the top bead. Hold the pane on both sides while you gently lower it out. Be careful! Wear gloves. The edges will be razor sharp!
- Install the replacement pane in the reverse order, taking care not to crack the glass by applying too much pressure. London Window Fitters often use the trick of applying a little dishwashing soap to the recess in the window frame, when pressing in the final bead.
Under normal circumstances we would recommend that you get Window Fitting Quotes instead and perhaps on Mr-Skill too. That’s because you run the risk of injuring yourself, if for no other reason than that the job may be a little bit unfamiliar to you.