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

Cadnam washroom sealing

Commercial sealant work in Cadnam for contractors, FMs and building owners: sealing in commercial washrooms, showers, kitchens and wet areas, quoted at a fixed price.

  • Urinal joints that look unhygienic
  • Sealant laid over old silicone and now peeling
  • Washrooms that look worn because of the sealant
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
Constructionline member
£5m PL insurance

Need washroom sealing in Cadnam?

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

Why deal with it now?

Cleaning mouldy sealant only masks it, but the mould is rooted in the silicone and comes back. Replacement deals with the cause in the joint and your cleaning team stops chasing it. For buildings around smaller places like Cadnam, 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.

Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well.

What you get with us

  • Coloured sealants to suit the setting, where available
  • Old sealant cut out, never sealed over
  • Work carried out by CSCS-carded applicators
  • CHAS accredited

See what affects the cost or our accreditations and insurance.

Washroom sealing in Cadnam

When mould has spotted a silicone joint, more cleaning won’t remove it. The mould has rooted into the silicone itself, which is why it comes back however often it is treated. Only replacement gets rid of it for good. We work on accessible toilets and changing rooms, kitchens and tea points and urinals and WCs, and the failures we are asked to look at most are stained or open joints at kitchen sinks and worktops and urinal joints that look unhygienic. Looking for mastic applicators who cover Cadnam? Mastic Doctor has worked for contractors, FMs and building owners since 2005, CHAS accredited and a Constructionline member.

Smaller places such as Cadnam still have commercial washrooms and kitchens: in halls, pubs, schools, care homes and farm-based businesses. Sealant that has gone black with mould usually can’t be cleaned, so it is cut out and replaced.

Every job ends the same way: guaranteed. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Cadnam (SO40)
Wider area
Hampshire
Guarantee
12 months on every job
Quotes
Quoted before any work starts
Call
01277 525 020
Page updated
3 November 2026

Common problems we fix in Cadnam

Washrooms are warm, damp and full of organic residue, and silicone joints hold onto all three. Anti-mould additives help, but in a poorly ventilated room mould can still take hold eventually.

Things that normally lead to an enquiry:

  • Sealant lifting along a tray edge
  • Open joints along basins and vanity units
  • Discoloured joints around urinals and WC pans
  • Users noticing mouldy joints

En suites at hotels like The Bartley Lodge Hotel (less than half a mile south of Cadnam) are cleaned daily, which wears silicone over time.

What to look for in a quote

  • Health and safety accreditation such as CHAS
  • How they’ll work around occupants
  • How they handle RAMS and site documents
  • Who will actually carry out the work

How to choose a sealant contractor

Looking after the joints

Every sealant joint needs some looking after, and how long they last depends on how they’re treated. We suggest:

  • Respect the cure time before reopening each room
  • Avoid scourers and harsh descalers on silicone
  • Mention any site permits or estates rules at quote stage
  • Photograph and log failed joints across the estate

Include sealant joints in your planned maintenance checks. Check for mould spots, splits, lifting edges and open joints at trays, basins and urinals and log what you find.

Boards behind panels and vanity tops can swell when water gets past a failed joint. After that, those parts need replacing rather than resealing.

Washroom sealing in Cadnam: the local picture

A 2-mile radius around Cadnam takes in several hotels. Each has en suites, back-of-house toilets and kitchens with sealant that moulds and splits.

At a school such as Bartley Church of England Junior School, changing rooms and kitchens need cleanable joints as much as the toilets. Healthcare estates like Tatchbury Mount Hospital (to the east of Cadnam) expect contractors to follow their permits and cleaning rules in every washroom.

Cadnam is about 3 miles west of Totton, in Hampshire. Anywhere in SO40, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. Cadnam is one of 723 places in Hampshire on our list. There’s a separate page for Southampton, about 8 miles away.

Anyone looking for washroom sealing in SO40 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. Among the streets we cover are Old Lyndhurst Road, White Hart Lane and Southampton Road. If your building is just outside Cadnam, we cover Wittensford (1 mile west), Bartley (1 mile south-east), Copythorne (1 mile north-east), Newbridge (1 mile north) and Winsor (1 mile east). Bigger towns within reach include Winchester (15 miles north-east), Eastleigh (11 miles east), Totton (3 miles east), Chandler's Ford (9 miles north-east), Hedge End (12 miles east) and Lymington (11 miles south).

Local landmarks in Cadnam

Locally, jobs take us to sites close to The White Hart pub and the streets around them. The closest station to Cadnam is Ashurst New Forest station, roughly 3.1 miles south-east of the centre. Nearby you will also find Tatchbury Mount Hospital (2.2 miles east) and National Dairy Museum (3.6 miles south-east). Not far away are Copythorne Common.

Map of Cadnam © OpenStreetMap contributors

Building owners, agents and FMs in Cadnam

As a CHAS accredited contractor and Constructionline member, we are straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.

Hotels, schools, healthcare sites, offices and retail units come to us directly as well. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.

What sealant work can’t fix

A proper diagnosis includes knowing what sealant can’t do. You’ll hear from us if the cause turns out to be one of these:

  • Loose panels, vanity units or tiles, which need fixing first
  • Water escaping beneath the floor rather than through a joint
  • A dripping waste or valve behind a panel

If you’re not sure, just phone 01277 525 020 or send photos by email and we’ll give you a straight answer.

Surfaces we seal

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

Questions we are asked in Cadnam

Is Cadnam off your patch?

Not at all: smaller places are covered as well as towns. We work across Greater London and the South East. We plan jobs in smaller places so return trips are kept to a minimum.

Do you take on work at healthcare sites like Tatchbury Mount Hospital?

Yes, provided the work is planned with the site’s estates team. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.

Are your applicators CSCS-carded?

Yes. If you need card details for site access, tell us and we will confirm them with the quote.

How much does the work cost?

Every job gets its own fixed quote. To get one, call 01277 525 020 or use the quote form.

Do you use special sealant for toilets and showers?

An anti-mould sanitary silicone for most washroom joints. Neutral-cure grades are used where acetoxy types could mark metals, stone or mirror backings.

Do you work to architects’ specifications?

Yes. Include it with the drawings when you ask for a quote, and we’ll price the work to it, flagging anything that needs clarifying.

Can you send site paperwork?

Requirements differ from site to site, so tell us what you need and we will confirm it when we quote.

Diagnose, treat, sign off

Where the site stays busy, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed before the next one starts. Jobs in and around smaller places like Cadnam are usually planned as a single visit, so we ask for photographs and rough sizes first. That way the right products come on the day.

  1. Every room is surveyed and the failed joints listed.
  2. The fixed quote sets out the rooms, the products and the phasing.
  3. The whole of the old bead is removed.
  4. Each joint is cleaned and left dry.
  5. A sanitary silicone bead is laid and given a smooth tooled finish.
  6. Rooms reopen after the cure time.

What we need from you

  • Confirm the product named in the specification
  • Let building users know which areas are affected
  • Point out any areas we must not close

Get a fixed quote

Need a figure for a tender or a budget? We’ll quote against your scope and drawings that you can work with. For a chat about it beforehand, give us a call on 01277 525 020 or email the details over.

Get a price

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Accreditations

Trusted. Accredited. Insured.