Timloc Telescopic Underfloor Vent (Up to 5 courses) – 20 pcs

The Timloc Telescopic Underfloor Vent is designed to provide ventilation below suspended ground floors, where getting adequate airflow through the sub-floor void is essential for preventing damp, rot and long-term structural damage. The telescopic design is what sets this apart from fixed vents — it extends to suit wall thicknesses from 225mm up to 375mm, covering three to five brick courses without any cutting or awkward packing.

This kind of adjustability matters on site. Wall thicknesses vary, courses are not always consistent, and having a vent that accommodates the variation rather than fighting it saves time and avoids the need to stock multiple sizes. The minimum cavity width required is 50mm, which covers the vast majority of standard cavity wall constructions.

Where the Timloc Telescopic Underfloor Vent Earns Its Keep

New builds and renovation projects both benefit from this vent. On a new build, the telescopic adjustment makes installation straightforward during the bricklaying phase. On a retrofit or renovation, where you are cutting into an existing wall and the exact course height may be less predictable, the range of adjustment is genuinely useful rather than just a nice-to-have on the spec sheet.

The vent is available in a range of colours including white, black, brown, buff, grey, terracotta, and blue and black — so matching to the surrounding brickwork or render is straightforward rather than an afterthought. They are supplied in packs of 20, which suits both larger projects and contractors who prefer to keep a sensible stock on the van.

As a telescopic underfloor vent, this product ticks the boxes that matter to builders and groundworkers: quick to fit, adjustable without modification, and available in the colours that actually appear on UK housing stock.