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

Washroom Sealing contractors in New Ash Green

Washroom sealing in New Ash Green, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.

  • Resealing that didn’t last because the old bead stayed
  • Gaps where vanity tops meet the wall
  • Black mould inside silicone joints that cleaning can’t shift
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Signed off, with 12 months’ guarantee.
Covering the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Need washroom sealing in New Ash Green?

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

How we handle washroom sealing in New Ash Green

Black spotting along a sealant bead is not a cleaning problem. The growth is inside the sealant, which is why it comes back however often it is treated. Only replacement gets rid of it for good. Site teams most often ask us about sealant lifting along a tray edge and failed sealant behind washroom basins, on kitchens and tea points, urinals and WCs and vanity units and basins. Facilities teams, main contractors and managing agents in New Ash Green tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

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

Guaranteed is the last step of every job. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.

Place
New Ash Green (DA3, TN15)
Wider area
Kent
Guarantee
A 12-month guarantee
Price
Quoted before any work starts
Call
01277 525 020
Last updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

After the work

Once the work is signed off, these steps help:

  • Leave signs up until the cure time is over
  • Add sealant joints to planned maintenance checks
  • Act on the first split you see at a shower tray
  • Report faulty extraction promptly

Each room goes back into use only when the sealant has cured enough. We’ll tell you when the wet areas can be used, and it helps if signs stay up until then.

Mould in a joint spreads along the bead and into nearby grout and users notice. Replacing it early keeps the job to a reseal.

When to call us in New Ash Green

Daily commercial cleaning wears sealant faster than people expect. Harsh products, abrasive pads and pressure washing break down a joint’s surface and edges, and dirt and mould then get a foothold.

Typical triggers for a call:

  • Failed sealant behind washroom basins
  • Washrooms that look worn because of the sealant
  • Stained sealant around pans and urinals
  • Open joints at the base of cubicle panels

Healthcare washrooms on sites such as Darent Valley Hospital, 5.2 miles to the north-west of New Ash Green, are resealed area by area, under the site’s own infection-control rules.

What your quote should include

  • Who will actually carry out the work
  • Proof of insurance
  • Their pre-qualification and accreditations
  • The named product and why it was chosen

How to choose a sealant contractor

Quoting for work in New Ash Green

To price the job, we consider:

  • The site’s rules and procedures
  • Which sealant the job calls for
  • Quantities, in metres or numbers
  • Access and working height

A quote for washrooms and wet areas depends on quantities, condition and access. Ask us for a fixed quote.

Details that help us quote

There’s no need for a formal survey. A few details are enough to get going:

  • Drawings or a marked-up plan, if available
  • The postcode of the building
  • Any dates the work must fit around
  • Any specification or named product

Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. To get it moving, ring 01277 525 020 or send details through our quote form.

What happens if it’s left?

A failed joint behind a basin or along a shower tray lets water run where it shouldn’t. That can lead to swollen boards, marked ceilings below and lingering smells which costs more to fix than a reseal. For buildings around smaller places like New Ash Green, 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.

Small jobs and large programmes are priced from the same things: scope, access, product and programme. Call for a quote, and you will have a fixed figure to work with.

Why appoint us

  • Colours chosen to suit frames, cladding or finishes where possible
  • CHAS accredited
  • Fully insured
  • One contact handling all your sites

See what affects the cost and our accreditations and insurance.

How a job runs

A typical day starts with protection: tape along each joint edge and covers over finishes, stock and equipment close by. The work itself typically takes a few hours for one toilet block, with bigger buildings phased across a number of visits, and we clear our waste as we work. For work around New Ash Green, we aim to finish in one visit, so photographs and measurements up front really help. That way the right products come on the day.

  1. We inspect each washroom and record the joints to be resealed.
  2. The fixed quote sets out the rooms, the products and the phasing.
  3. Old sealant is removed completely and the faces cleaned.
  4. Each joint is cleaned and left dry.
  5. New anti-mould sealant goes in and is tooled neat.
  6. Each area is handed back when ready.

What we need from you

  • Explain the parking and delivery arrangements
  • Clear stock, furniture or equipment away from the joints
  • Tell us your opening times and when work is allowed

Get a fixed quote

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, call the office on 01277 525 020 or send photos by email.

Ask for a quote

Related advice

When something else is needed

We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:

  • Water escaping beneath the floor rather than through a joint
  • A room that stays damp because ventilation isn’t working
  • A dripping waste or valve behind a panel

Not sure which it is? You can ring 01277 525 020 or use the quote form and we will tell you honestly.

What we seal

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

FAQs: New Ash Green

Will all the washrooms in our New Ash Green building be closed at once?

Normally only some of them, for a short time. We work in phases so other facilities stay open. Each area is handed back once the sealant has cured enough to use.

Do you take on work at healthcare sites like Darent Valley Hospital?

Yes. We work in healthcare settings as well as offices and schools. We follow the site’s permits, sign-in and infection-control procedures in every area.

Is it OK to put new silicone on top of the old?

We always remove it. Fresh silicone can’t key to an old bead so a bead over the top fails quickly.

Do you do washroom sealing in healthcare settings?

Yes. Your infection-control rules, estates requirements and permits are followed, and phase the work so areas keep facilities.

How long do sealant joints last?

There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.

How do you deal with asbestos in old sealant?

Managing asbestos is the dutyholder’s responsibility, so we’ll ask for the register before work on an older building. Work pauses if suspect material is found, until it has been tested.

What’s the quickest route to a quote?

It works in four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. The first step only needs photographs and a postcode.

Sanitary sealant for New Ash Green buildings

Central London is about 20 miles from New Ash Green. Business park offices have washrooms in daily use by staff, so we work a block of facilities at a time.

At a school such as New Ash Green Primary School, changing rooms and kitchens need cleanable joints as much as the toilets. For an occupier at a site such as Heaver Farm Trading Estate, 0.7 miles south-west of New Ash Green, the canteen and welfare facilities need cleanable joints as much as any office.

New Ash Green is about 5 miles south of Northfleet, in Kent. New Ash Green sits inside our coverage and the rest of Kent, with the same fixed quotes and 12-month guarantee as everywhere else. Our Kent coverage takes in 931 places, large and small. There’s a separate page for London, roughly 20 miles from New Ash Green.

Anyone looking for washroom sealing in DA3 and TN15 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. For a building on Church Road, Upper Street North and Upper Street South or nearby, send details and we’ll quote for washrooms and wet areas. Sites close to New Ash Green are covered too, including Ridley (1 mile south-east), Hartley (1 mile north), New Street (2 miles south-east), Hodsoll Street (2 miles south-east) and Longfield Hill (2 miles north-east). A short drive away, we cover Maidstone (12 miles south-east), Dartford (6 miles north-west), Sevenoaks (8 miles south-west), Gravesend (5 miles north-east), Tonbridge (12 miles south) and Northfleet (5 miles north).

Landmarks near New Ash Green

Recent enquiries here include premises near The White Swan Public House, Longfield Academy and Rectory Meadow, among other places. The closest station to New Ash Green is Longfield station, roughly 2.1 miles north. Well-known places in the area include Eynsford Castle (4 miles west) and Darent Valley Hospital (5.2 miles north-west).

Map of New Ash Green © OpenStreetMap contributors
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