Timloc External Cowl – 255 x 95 (1 pcs)

The Timloc 255 x 95mm external cowl is a straightforward, reliable solution for finishing wall vent openings on external facades. If you’ve ever had a vent that lets the wind whistle through unchecked, you’ll know exactly why these exist. The timloc 255x95mm external cowl fits over the vent aperture to allow adequate air movement while reducing the cold draught that makes rooms feel uncomfortably exposed during winter. Simple in concept, but it does the job properly.

Timloc has been producing plastic ventilation products for UK construction for a long time, and the build quality on these cowls reflects that experience. The angled cowl design deflects wind-driven rain away from the vent opening, which is particularly useful on elevations that take the weather full-on. It keeps the vent functional without letting precipitation drive straight through into the cavity or internal space behind it.

Where the Timloc External Cowl Gets Fitted

This cowl is commonly used alongside airbrick systems, sub-floor ventilation runs, and utility room or bathroom exhaust points that terminate through an external masonry wall. Bricklayers often fit these at first fix stage, though they’re just as easy to retrofit — the face plate covers the surrounding reveal neatly enough that the finish looks intentional even if it wasn’t planned from the start.

The 255 x 95mm sizing corresponds to a standard single airbrick slot, so compatibility with typical UK domestic and commercial masonry construction is generally straightforward. No cutting or modification should be needed for a standard opening.

Colour Options and Matching

Available in brown and terracotta, which covers the two most common brick tones you’ll encounter on older housing stock and traditional brick-built commercial buildings. Neither colour is an exact match for every brick type out there — brickwork varies enormously — but both options blend in far better than a plain grey fitting would on warm-toned elevations. Worth ordering both and holding one back if you’re working across a mixed brick estate.

At this price point, keeping a few of these on the van is entirely sensible. Ventilation queries come up on almost every external job at some stage, and having the right cowl to hand saves a return trip. The timloc 255x95mm external cowl is one of those small fittings that earns its place in the toolbox by just working, every time.