Tiling in Mill Hill

Tiling in Mill Hill: what is different here

Grout and glass at 353 mg/l

Affinity Water's 2025 figures for the Stanmore/Mill Hill zone put mean hardness at 353 mg/l, measured as calcium carbonate. Inside a shower enclosure that shows up within months as white scale on the glass and dark, crusty grout lines. We suggest larger-format tiles to reduce the number of joints, a stain-resistant or epoxy grout inside the enclosure, and a frameless screen that is easy to squeegee. Avoid textured tiles inside the shower, because scale bonds to them and cannot be cleaned off.

Millbrook Park flats: the lease and the ceiling below

In a Millbrook Park block at Mill Hill East, the floor you tile is the ceiling of the flat below. Many leases restrict hard floor finishes outside kitchens and bathrooms or require acoustic underlay, and the managing agent may need to approve the work.

Read the lease, then send us the clause. In wet rooms, tanking under the tiles protects the neighbour's ceiling, and it is the part of the job we do first. Concrete floors in these blocks give a solid base for tiles once levelled.

Cottage floors that flex

The older cottages in Mill Hill Village, along The Ridgeway and on Highwood Hill, mostly have suspended timber floors on joists, and their walls are rarely flat or plumb. Tile laid straight onto old floorboards will crack along the joints. We overboard with exterior-grade ply or cement backer board, screwed at close centres, and use a decoupling membrane where some movement remains.

On uneven walls we build out with a levelling plaster or board before tiling, so the finished lines look straight. Inside some weatherboarded cottages, bathroom partitions are timber studwork rather than masonry; round a shower we line those with cement board and tank it, because tiles on plasterboard or old lath behind a shower are the first thing to fail.

Interwar bathrooms round the Broadway

Valuation Office counts date 70.2% of the homes in the Mill Hill Broadway statistical area to 1919 to 1939, and the streets towards The Hale are of the same interwar and post-war kind. Their bathrooms are compact, often with a separate WC or a wall knocked through to join the two. Many have been retiled more than once, sometimes one layer over another.

We take them off down to sound plaster or board rather than add a third layer, check the walls behind for damage, and set out from the window or door so cut tiles end up where they are least visible.

Shared bathrooms in Barnet HMOs

Barnet's HMO standards guidance sets requirements for bathroom provision in licensed shared houses, and those bathrooms get heavy use. For a shared house, we recommend porcelain floor tiles with some slip resistance, sealed grout and a tanked shower enclosure. Where tiles have cracked or grout has failed, regrouting and replacing individual tiles can be a cheaper repair than a full retile, and is quicker during a re-let.

Original tiled halls and paths in older houses

Some of the Victorian and Edwardian houses in and around the conservation area keep original tiled halls, porches or front paths. Where one is cracked or lifting, we would rather repair it than replace it. Any loose tile comes up, has the old adhesive cleaned off and goes back down on new adhesive, and broken ones are matched from reclamation or reproduction stock.

Patterned floors are recorded with photographs before any tile is moved so the layout goes back exactly. If the house is listed, the floor counts as part of its character and repair should follow Barnet's advice.

Official sources

• Affinity Water: 2025 water quality report, Stanmore/Mill Hill supply zone (AF052)
• Valuation Office Agency: dwellings by build period in the Mill Hill MSOAs, March 2025 (CTSOP4.1)
• Barnet Council: Mill Hill Conservation Area character appraisal (April 2008)
• Barnet Council: property licensing and HMOs
• New London Architecture: Millbrook Park, former Inglis Barracks

Last reviewed October 2026 by EliteShires Property Services.