Removing trickle vents - what to fill with?

A trickle vent is a very small opening in a window or other building envelope component to allow small amounts of ventilation in spaces intended to be

Draak white trickle vent 263mm for UPVC windows Quality window ventilation to prevent condensation & mould, ready for collection in 2 hours or next-day

sabang jitu slot In my UPVC windows there is rain deflector grill cover on the outside and a cover with a shutter on the inside A slot about 10mm high is cut

nykøbing falster slot Shop Window Trickle Slot Vent 263mm White for uPVC Double Glazing & Timber Windows Reduces Condensation, Damp & Steam in Windows Fully Adjustable online at