Timloc Underfloor, Vent, Horizontal Front Extension + 150mm (20 pcs)

The Timloc 150mm underfloor vent front extension is the horizontal section that bridges the gap when there is a vertical step between the inner and outer leaf of a wall. It slots between the upper and lower parts of the telescopic underfloor ventilator, handling a step of 6 to 7 brick courses without any cutting, bodging, or creative interpretation of the instructions. Simple idea, does exactly what it says.

Underfloor ventilation is one of those details that gets overlooked until something goes wrong. Suspended timber floors need a consistent through-flow of air to prevent moisture build-up underneath. When the ground level outside drops away from the finished floor level inside, a standard single-piece vent will not reach across. That is where the timloc 150mm underfloor vent front extension earns its place. It extends the duct horizontally so the air path is maintained regardless of the step in the structure.

Where the Timloc Front Extension Fits In

This extension is part of the Timloc 1200 series telescopic system, which is a well-established approach used by groundworkers, bricklayers, and general builders across the UK. The telescopic design means the vent can be adjusted to suit the wall thickness and the floor-to-ground relationship, rather than cutting vents down on site with a grinder and a certain degree of optimism.

The extension piece itself is straightforward to fit. It locates between the two halves of the ventilator and is available in a range of colours including white, grey, brown, buff, black, terracotta, and blue and black. That matters on finished elevations where mismatched vent colours stand out more than most builders would like to admit.

Colour Matching and Specification

Specifying the right colour at the outset saves the awkward conversation when the brickwork is almost complete. Timloc offers a broad enough range to match most common UK brick types. If you are working to a housing developer specification, it is worth checking which colour is called out before ordering in volume, since these are generally sold in packs.

The 150mm front extension is specifically designed for the +150mm step configuration. Timloc also produce other extension sizes for different step heights, so make sure the one you are ordering matches the actual vertical step on your build.