Smiths fitted Bathroom and back bedroom windows several years ago. As I looked out the back bedroom last year, I noticed there was a 2mm gap of the night sky coming through, between window and frame. I sent an email to Smiths there and then, as I was already commicating on another issue where they installed a Warm roof very badly and extra random cost, and still not resolved 1 year later (warm roof still not fixed). I will be adding the Warm roof issue, and other previous jobs, like the Smiths conservatory which leaked until I was forced to upgrade to a warm roof or lose the Conservatory guarantee, because these where separate jobs. Watch this space. Anyway, Smiths came round (surprisingly in the next few of weeks). Engineer was good and solved the dopped window, which was probably installed like that because we have never used that room. But I mentioned to him that the bathroom had been making whistling noises for the last year, and due to Smiths lack of commitment to replying to customers, I’ve been ignoring it as it only happens when very windy. He took the beading off, and there was a 1inch gap between the window and the wall on both sides. The engine was surprised that this gap was never filled with expanding foam. The whistling noise came from the outside mastic degrading over a few years and wind getting into the big cavities. I have had all my windows installed by Smiths, and because I never watched them install these windows, I am scared to think how my other windows where installed.