I installed the extra glass panel on my bedroom 2nd floor facing busy road. It did nt 100% reducing the noise but definitely reduce by 70%. In my case it is good enough
HI Unifire, how is the outcome from your door installation with Ho ho engineering? I engaged them to replace my door prior to checking the review online , now so worried coz so many bad review about their workmanship and lousy quality of door , weird thing is that the deposit receipt showing company which is located in JB , my bad that I was in rush and didn't pay attention at all on the address , sighhh so worry now