Tiling in Northwood

Tiling in Northwood: what is different here

Grout and glass in 348 mg/l water

At 348 mg/l, Northwood's water leaves a white bloom on dark grout and a crust along the foot of shower screens within weeks. That changes the specification. We usually suggest a mid-tone grout, which hides mineral marks better than black or bright white, an epoxy or high-performance cement grout inside the shower, and larger tiles where the room suits them, so there are fewer joints to scale up.

Silicone at the tray and bath edge needs renewing more often in hard water, and we explain how to clean it so it lasts.

Several bathrooms in one house

Many larger HA6 houses have a family bathroom, two or more en suites and a cloakroom, added at different dates and to different standards. A refit is the chance to see what sits behind the old tiles: plasterboard that was never sealed, a timber floor that flexes under heavy stone, or an old shower built straight onto plaster.

On suspended timber floors we fix the boards and lay a suitable backer board before tiling so movement does not crack the grout. Where an upper-floor shower sits over a sitting room, tanking is what protects the ceiling below, so it is never left out.

Flats near the station: leases and the ceiling below

Over a third of Northwood ward's households lived in purpose-built flats in 2021, and the lease for a flat often controls floor finishes. Some leases require carpet in living areas, or acoustic underlay beneath any hard floor, to protect the flat below from footfall noise. Read yours, or ask the managing agent, before choosing a tiled kitchen or hall.

In a bathroom the risk runs the other way: a failed tray seal sends water through a neighbour's ceiling. We tank showers and wet floors, and we ask the agent whether the block has set hours for noisy work such as stripping old tiles.

Licensed shared houses: tell Hillingdon first

Under Hillingdon's proposed HMO conditions, the licence holder must notify the council before changing amenity provision, which includes adding or removing a bathroom or kitchen. The licence was granted for a set number of occupiers against the facilities in the house, so taking a shower room out of use, even for a refit, may affect it.

Agree the timing with the council, plan the work one room at a time, and tell the tenants in writing. Shared bathrooms in a five-person house take heavy use, so we specify slip-resistant floor tiles and grout that stands up to scrubbing.

Original tiled porches and halls

Hillingdon's leaflet notes that the Frithwood houses have kept many of their original features and fabric, and an original geometric or quarry-tiled porch or hall floor is among the hardest to replace once lost. Loose or cracked tiles can often be lifted, cleaned and relaid on a fresh bed, with missing pieces matched from reclaimed stock or specialist reproductions. We never cover an original floor with a new one without asking, and we tell you if the base beneath has moved enough to need more than relaying.

Official sources

• Affinity Water: 2025 water quality report, Northwood supply zone (AF048)
• Nomis: Census 2021 TS044 accommodation type, Northwood and Northwood Hills wards
• Hillingdon Council: proposed HMO licensing conditions (Appendix 2 to the Cabinet report)
• Hillingdon Council: Northwood-Frithwood Conservation Area leaflet

Last reviewed October 2026 by EliteShires Property Services.