Replacing Difficult Sealed Unit inUPVC Frame

[Traveller]

I am trying to replace a sealed unit in. UPVC frame. It is about 95 x 55 cms. The problem is that new interior windowsills were installed after the UPVC frame and now obstruct the joint between the bottom beading and the frame where one would normally insert a tool to release the beading.  The overlap is about 2 or 3mm - see picture.
 

My question is whether it is possible to replace the sealed unit having removed only the top and two side beadings - ie leaving the bottom beading in place.

 

Any experience or comments welcomed.

[nod]

Yes you can do this You might have to push the glass from the outside to get it out 

[Nickfromwales]

Easy enough.

 

Just take the 2 sides and the head out, and then push the window very gently (you need two people for this, both wearing gloves and goggles), and lift it up and out. Then, once the unit is out, you can pry out the remaining bottom seal. This you should be able to persuade back in afterwards, but remember to use a block of wood and never hit the moulding directly with a regular hammer (rubber or nylon faced hammers are typically in the window fitter arsenal ).

[Traveller]

Thanks for both replies. I will order the new sealed unit and give it a go.

Thankyou.

[Nickfromwales]

3 hours ago, Traveller said:

Thanks for both replies. I will order the new sealed unit and give it a go.

Thankyou.

You should be measuring the old unit, and then getting a direct replacement based of that.