The Mastic Doctor team standing beside their branded vans outside an office building
Hampshire · England

Commercial washroom and wet-area sealing in South Down, Hampshire

Sealing in commercial washrooms, showers, kitchens and wet areas across South Down, carried out by CSCS-carded applicators. CHAS accredited and fully insured.

  • Discoloured joints around urinals and WC pans
  • Stained or open joints at kitchen sinks and worktops
  • A new bead over an old one coming away
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Washroom sealing in South Down

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

Building owners, agents and FMs in South Down

Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.

Whether you are a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. We can agree access arrangements and keyholder contacts beforehand.

How we handle washroom sealing in South Down

You can’t shut every toilet in an office, school or hotel at once. Work is phased by room or by section, so staff, guests or pupils always have somewhere to go. Tell us your site hours and access windows and we’ll plan around them. If you have failed sealant in a tea point or staff kitchen and split or peeling sealant at shower trays, we can help. Most enquiries from South Down start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.

Rural businesses near smaller places such as South Down, from cafés to event venues, rely on washrooms and kitchens that stay clean. Tell us your opening times and quiet periods and we will plan around them.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and the quote explains what it covers.

The Mastic Doctor team standing beside their branded vans outside an office building
Place
South Down (SO21)
Region
Hampshire
Cover
12 months on our workmanship
Quotes
Fixed quote, scope in writing
Call
01277 525 020
Last updated
3 November 2026

Your questions answered

Is a smaller place like South Down outside your area?

Not at all. South Down is within our area. We work across Greater London and the South East. Send photographs and a list of what needs doing, and we’ll plan the job to need as few trips as possible.

Will you plan work around the academic year at somewhere like University of Winchester?

Yes. Education sites typically want the work in vacations or in phases during term, and we plan to suit. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.

Do you need to see the site first?

It depends on the job. Simple work can often be priced from photographs, and bigger or more complex jobs typically get a visit.

Are you insured?

Yes. We’re fully insured, including public liability cover.

Do you need to remove the old sealant?

We always remove it. Fresh silicone can’t key to an old bead, so sealing over it soon peels.

When can showers be used after new sealant?

The silicone needs time to cure before water reaches it. We plan the phasing around that so there are always rooms open.

What sealant do you use in washrooms?

It depends on the joint. Washrooms and showers take anti-mould sanitary silicone while kitchens may need a food-safe grade.

Why deal with it now?

A failed joint behind a basin or along a shower tray lets water run where it shouldn’t. In a commercial building that can mean damaged boards, stained ceilings on the floor below and odours, and fixing that takes far more work than resealing. For buildings around smaller places like South Down, water damage can go unnoticed for longer, especially where a building isn’t used daily, which gives a failed joint time to do damage. Renewing joints in good time avoids the problem.

Pricing washrooms and wet areas depends on how many there are, their condition and the access, plus any specification you are working to. Ask us for a fixed quote.

Why us?

  • 12 months’ guarantee on every job
  • Failed material removed, not covered up
  • CHAS accredited
  • Constructionline member for supplier checks

See our cost guide and our accreditations and insurance.

When to call us in South Down

Daily commercial cleaning wears sealant faster than people expect. Harsh products, abrasive pads and pressure washing break down a joint’s surface and edges so grime sticks to the damaged surface.

Clients typically get in touch after noticing something like this:

  • Stained or open joints at kitchen sinks and worktops
  • Urinal joints that look unhygienic
  • Black mould inside silicone joints that cleaning can’t shift
  • Shower tray joints that have opened up

Office toilets at parks like Hazeley Enterprise Park (to the north-east of South Down) take steady weekday use, and mouldy silicone soon shows.

What your quote should include

  • What site paperwork they can supply
  • Their plan for phasing and protecting the area
  • The terms of the workmanship guarantee
  • Their pre-qualification and accreditations

Questions to ask before you appoint anyone

Our process

We follow your site rules from the start: sign-in, induction and whatever permit system the building uses. With the paperwork done, we take the joints in the sequence agreed with you. For a building around South Down, tell us how to find it and who will meet us. Add it to your enquiry and we’ll build it into the plan.

  1. We agree which washrooms close and when.
  2. Anything behind the joints that needs another trade is flagged.
  3. Failed sealant and residue are stripped out.
  4. We reseal with the grade suited to each area.
  5. We confirm reopening times for each washroom.

What we need from you

  • Send asbestos survey details if the building is pre-2000
  • Tell us your opening times and when work is allowed
  • Confirm the product named in the specification

Ask for a quote

Specifications, drawings and tender packages are welcome with any enquiry, and we will price the work to it. For smaller jobs, photographs and a description will do.

Get a price

Advice

Different surfaces, different methods

Changing rooms and gyms

Showers, floor edges and vanity units in changing rooms all need sound sealant and we look at them as one job.

Basins and vanity tops

A failed joint along a vanity unit lets water into the carcass. Resealing early protects the unit.

Washroom sealing in South Down: the local picture

At about 63 miles from central London, South Down is within reach of the capital. Business park offices have washrooms in daily use by staff, so we work a block of facilities at a time.

On a healthcare site such as Wessex Hospital, 1.7 miles to the south-west of South Down, washroom work starts with the infection-control team’s sign-off. For a hall at a building such as Church of All Saints, resealing the kitchen and toilets can be fitted between bookings.

South Down is about 3 miles north-east of Chandler's Ford, in Hampshire. South Down sits inside our coverage and the rest of Hampshire, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. South Down is one of 723 places we cover in Hampshire for washrooms and wet areas. Southampton is covered too, some 7 miles away.

Work on washrooms and wet areas is covered throughout SO21, whatever the building. If your site is on Cross Way, Fairfield Road and Grove Road or close by, send details and we will quote for washrooms and wet areas. Sites close to South Down are covered too, including Compton (1 mile north), Otterbourne (1 mile south-west), Shawford (1 mile north-east), Twyford (1 mile east) and Oliver's Battery (2 miles north). Bigger towns within reach include Winchester (3 miles north), Eastleigh (3 miles south), Fareham (13 miles south-east), Andover (15 miles north-west), Totton (10 miles south-west) and Chandler's Ford (3 miles south-west).

Landmarks near South Down

Recent enquiries here include premises near The Bridge Inn and Thornden School, among other places. For rail, the closest station is Shawford station, roughly 0.6 miles north-east of the centre. Well-known places in the area include Balfour Museum of Hampshire Red Cross History (2.9 miles north) and Wolvesey Castle (3.2 miles north). For a walk, there’s Twyford Down and Shawford Down.

Map of South Down © OpenStreetMap contributors

Honest limits

Sealant solves a lot, but not everything, and we are upfront when that’s the case. It won’t fix:

  • Fittings that move too much to hold a bead
  • Condensation from failed extract fans
  • Leaks through tanking or membranes below the finishes

If in doubt, call the office on 01277 525 020 or send photos by email and we will say what we think before you book.

Joints and surfaces we work on

  • Kitchens and tea points
  • IPS panels and cubicles
  • Vanity units and basins
  • Showers, trays and wet room floors
  • Accessible toilets and changing rooms
  • Urinals and WCs
Accreditations

Trusted. Accredited. Insured.