hi All, I'm building underneath a highset in QLD. The outside walls were there, so I'm taking care of the inside frames, walls, etc. However this property is next to noise corridor and the certifier asked me to put acoustic sealing on any new window that's facing the noise corridor. There is a 1500x1500 new window I had to install on that side. So my question is if you could point me to the right direction what type of tradie or company should I look for that could assist with this. I called one of those soundproof companies but I believe their solutions are more complex than what I actually need, based on the certifier comments below: Any glass windows & sliding doors that face the rail line need to have acoustic seals. Thanks in advance.