Please click any of the images to the left, or the testimonial below, in order to view enlarged versions of all these images

Dear BB
Sorry to be so long sending these photos. Feel free to use whatever you like.
Regarding the one where there's a substantial gap, this is a problem with my window, not yours! Mine is very considerably off-square. The sequence shows before filling, after filling and painted. Whole thing didn't take more than 45 minutes. Again, the effect on the room is very good, both in terms of sound (the main reason for buying) and temperature.
Many thanks,