I had all my windows replaced in 2009. Since then I have had 10 misted units. The guarantee covered 7 of these but since then I have had another three that have failed. The installer also manufactured the glass units but that part of the business no longer exists.
Although l‘ve been offered replacements at cost + labour I think there must have been a fault in the manufacture. Is 10 failed units in 13 years excessive? If so what can I do? Thank you.