If you are wondering whether your existing french doors are suitable to have our integral blinds retrofitted into them, the answer is most likely yes, but this is something we will be able to confirm for you over the telephone or during a free survey to your property. Integral Blinds can be retrofitted into any window or door that can accommodate a sealed glass unit that is 24mm thick or thicker, which is the vast majority of the existing french doors in the UK. The standard thickness of a sealed unit that goes into windows and doors today are 28mm, which is also the standard thickness of our integral blinds, it is the standard thickness of a sealed glass unit in the UK. However, older frames including older french door frames used to have narrower sealed units, as narrow as 20mm in thickness, which would not be suitable for having integral blinds retrofitted. If you would like to know if you can have integral blinds retrofitted into your existing french door frames, please contact us today and we will be able to advise.