Trickle Vents perform an important function. They just don't look great!

Our Concealed Trickle Vent option, available on selected window and door systems

Hide that you've got trickle vents installed from the outside, while still allow them to carry out the important passive ventilation task

Now that in England & Wales trickle vents are a legal requirement in around 99% of home replacing their windows, this options is well worth considering