What Affects the Price of Windows and Doors?
The 8 factors that determine the price of uPVC and aluminium windows, how to compare two quotes fairly and what may not be included.
Advice
How to Reduce Street Noise with New Windows
What affects sound insulation
- Glass: acoustic glass is built specifically for noise; laminated glass also helps.
- Profile and seals: a tight closure blocks sound.
- Installation: gaps around the frame let noise in; PU perimeter insulation and quality silicone close them.
- Ventilation: an open window insulates nothing.
How to read the Rw value
Rw is the window’s sound-insulation value, expressed in decibels and given in the Declaration of Performance (DoP). The higher the value, the better it insulates. Compare only values from the DoP of the complete system (frame + glass). Learn more in DoP and CE marking.
What to ask before ordering
- which acoustic glass is proposed and what the system’s Rw value is;
- how installation and perimeter sealing are done: see installation in 8 steps;
- what ventilation options exist when windows stay closed.
Common mistakes
- Assuming a new window fixes noise even with weak installation.
- Comparing windows without the Rw value from the DoP.
- Forgetting ventilation: an open window cancels the insulation.
Frequently asked questions
Is double glazing enough for noise?
It depends. For noisy streets acoustic glass exists; concrete values are given in the Declaration of Performance.
Does installation affect noise?
Yes. Gaps around the frame let noise through, so perimeter insulation and silicone affect the result.
What is Rw?
Rw is the window’s sound-insulation value, in decibels, given in the Declaration of Performance. The higher it is, the less noise gets through.
Is changing the glass enough?
Glass is only one factor: the profile, seals and airtight installation also affect the result.
