I think that my window company have (presumably accidentally) fitted acoustic glass to the non-road side of my house and standard glass to the front, which is where we have the sound problem. Came to light when we were disappointed (to put it mildly) in the additional sound proofing provided. I have a clear email trail saying where I wanted the acoustic glass. They’ve drawn up the contract to the wrong spec (with acoustic on the back windows) and I’ve signed it. Since then, they say that they’ve actually fitted the right glass, and this can be discerned from the numbers on the spacing between the windows, which are obviously meaningless to me. I’m not a window expert and seems clear to me where the fault lies. What I want is a refund on the front windows so I can now get a decent company to give me some proper sound proofing. Anyone had a similar experience? Worried they will only offer to make good but I’ve lost faith in them and want someone else to remedy this. I’ve yet to pay the final instalment. It’s a local firm although they are fairly established. I have 3 different friends using them right now. Any advice appreciated on how to approach this with them. They’ve gone quiet for last 48 house since I realised and complained.