Sealed unit replacement

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Hi,

I have been given a patio door (the type with two doors that open like conventual doors) which have been stored outside behind a shed for 8 years. I wanted to use them & some other UPVC bits to replace the rear of my garage which is currently made of wood & getting tatty. The door frame was stored with the sealed units removed & they & the door frame were covered in mud. One of the sealed units is full of condensation & is growing crystals from the metal spacer bar. I have been quoted £72 for a repalcement sealed unit (1905mm x 420mm) which seems expensive to me & might change my plans on what I do. Is it possible to do it cheaper & possibly DIY seperating the sealed unit, cleaning & then re-sealing? I do not need the double glassing properties but just need it to look nice!

Any help appreciated

Mark
 
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There's nothing to lose by trying the DIY approach, as the door was free. I guess the units are manufactured with a dry inert gas filling, but if you can get the unit apart you could add some silica gel before re-sealing it.
 
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Do you have a local glass unit place? If so cut the unit open and clean up the glass as best you can then get them to make a new unit with the old glass. £40-45 of that price will be the toughened glass.
Very unlikely you can save the spacer bars and your going to need several stanley blades and a good quality knife
 
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If it's only for the back of the garage why put units in at all, how about infill panels or even 3/4 inch ply finished off with some hollow soffit silicone to it, obviously the ply thickness depends the thickness of the units
 
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