New patio doors and window condensation - on the outside!

[stevedo]

Recently had 2 patio doors and a new kitchen window fitted by a long established local window fitter. However, these new units "mist up" (or get condensation on them, whichever description is the right one?) on the outside on mornings like we have today i.e. cold and damp. This does not look right to me at all as all our existing windows don't do this (and the old doors that were replaced didn't do this either) but I'm being assured that this is "normal"

Clearly we're not really happy with either the condensation or response from the fitter.

So my questions are

1. Is this really "normal"
2. Is there an inherent issue with these doors/window
3. What course of action would you take from here considering the response from the fitter? (assuming that this is not normal)

Thanks
Steve

 

[foxhole]

It would suggest the doors are very thermal efficient so normal.