18/06/2026
Sash Windows Explained: Trickle Vents
Trickle vents. Tiny things. Surprisingly controversial.
They exist for one simple reason: ventilation.
Modern replacement windows are much better sealed than older, draughty ones. That’s great for warmth and comfort, but reduced airflow can lead to condensation, stale air and poorer indoor air quality.
So why are trickle vents required on many replacement windows?
Since the 2022 update to Approved Document F, many replacement windows are required to provide background ventilation, unless an alternative compliant solution is in place.
Fortunately, modern vent options can be far more discreet than people expect.
At Rose Collection, our vent options are designed to meet ventilation requirements while maintaining the traditional appearance homeowners love.
Find out more in the link below.
https://www.sashwindowsuk.com/energy-efficiency-ventilation