There are several ways to reduce noise. First, you’ll want to pick a uPVC window or door with a multichamber profile design. Why? Because air space helps reduce sound transmission, and multichamber profiles have more air space to deaden sound. Second, look for the best weatherstripping you can afford. By ensuring that doors and windows close properly and prevent air leakage, triple-contact weatherstripping can virtually eliminate outside noise. Third, consider thicker glass (6 mm or more) or laminated glass. Most of the surface area of a window or patio door is glass, and glass vibrates (and therefore transmits sound) just like the speaker in your stereo. Thicker glass tends to vibrate less.