From the outside it is impossible to tell we have secondary glazing.
Excellent job. We have just had CosyGlazing fitted to six windows. We were slightly nervous that the new glazing would detract from the appearance of the existing windows (which are old wooden sash windows – great to look at, but hopeless when it comes to insulation!). However, our fears were completely unfounded – from the outside it is impossible to tell we have secondary glazing, and even from the inside the windows still look good. The team were also very friendly and tidy, and we had excellent communication from head office. Very happy with the result.