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

Washroom Sealing contractors in Winchester

We carry out sealing in commercial washrooms, showers, kitchens and wet areas in Winchester and the surrounding area. Send photographs or drawings for a fixed quote.

  • Shower tray joints that have opened up
  • A new bead over an old one coming away
  • Gaps where vanity tops meet the wall
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
Constructionline member
£5m PL insurance

Washroom sealing for Winchester sites

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

How the job changes by surface

Wet-room floors and floor-to-wall joints

We seal the visible joints; we don’t install or repair waterproofing below, and we’ll say if the trouble looks to be beneath the floor.

Healthcare and care settings

Accessible and assisted washrooms are used and cleaned intensively, so their joints often need renewing sooner.

How we handle washroom sealing in Winchester

For clinics, hospitals and care homes, sealed joints matter for infection control as much as appearance. We work to your organisation’s estates and infection-control requirements and any site permits. Tell us what records you need and we’ll confirm with the quote. We work on accessible toilets and changing rooms, urinals and WCs and vanity units and basins, and what we’re called in for most is failed sealant behind washroom basins and users noticing mouldy joints. Facilities teams, main contractors and managing agents in Winchester tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

Retail parks, shopping centres and business parks around large towns like Winchester have customer and staff toilets that rarely close. Phased work keeps enough facilities open while the sealant is replaced.

We stand behind the joints we seal: 12 months, guaranteed. That covers our preparation and application, and if something we did falls short, we return to it.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
Winchester (SO22, SO23, SO32, SO21)
Region
Hampshire
Guarantee
12 months on our workmanship
Price
Fixed quote, scope in writing
Telephone
01277 525 020
Page updated
3 November 2026

Leave it or put it right?

Waiting for a holiday closure can leave failing joints in place for a long time. With phasing, the work can go ahead while most facilities stay open. In a town the size of Winchester, traffic, footfall and weather keep working on a failed joint. Acting early keeps it a sealant job.

Access can matter as much as the joints themselves: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.

Why clients in Winchester choose us

  • 12 months’ guarantee on every job
  • A Constructionline member, so easy to vet
  • Colour options checked against the specified product
  • Fixed quotes based on photos, drawings or a visit

Take a look at our cost guide and our accreditations.

From enquiry to sign-off

At the end of each section, the masking comes off, the area is cleaned and every joint is checked with your site contact. If an area should be left alone while the sealant cures, we say how long and put signs out. For premises in central Winchester, deliveries and parking need a bit of planning, whereas edge-of-town units normally have yard space. Let us know what’s there when you send details.

  1. Every room is surveyed and the failed joints listed.
  2. You get a fixed quote with the phasing plan.
  3. Old sealant is removed completely and the faces cleaned.
  4. Joints are degreased and dried.
  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

  • Send your site hours and access windows
  • For older buildings, check the asbestos register before work
  • Arrange parking or a loading space

Getting a fixed quote

Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To ask for one, phone 01277 525 020 or use the quote form.

Get a price

Related advice

Winchester: questions and answers

Do hotels near Winchester have to close for sealant work?

Rarely, if ever. We take a few rooms out at a time. Housekeeping and our team agree each day’s rooms.

Will you work in a care home in Winchester without moving residents out?

Yes. We work around residents’ routines, a room or two at a time. We follow the home’s own procedures throughout.

Is old silicone taken out first?

The failed bead is always removed. New silicone won’t stick to the old, so sealing over it soon peels.

Which sealant will you use?

Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.

Do you hold CHAS accreditation?

Yes. Mastic Doctor is CHAS accredited and a Constructionline member, which helps with supplier vetting.

Can you send site paperwork?

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

What do you charge?

That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a fixed quote and we will price it properly.

Doing it in-house

A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

Certain joints really need a specialist: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong typically costs more in the end than doing them right.

When it isn’t the sealant

A few problems need another trade or a different fix, and we point that out rather than sealing over them:

  • Hollow tiles or loose panels behind the joint
  • A room that stays damp because ventilation isn’t working
  • Water from plumbing, not from a joint

Not sure which it is? You can ring 01277 525 020 or email the details over and we’ll tell you honestly.

Where we work in Winchester

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

Busy facilities in and around Winchester

There are two care or nursing homes within about 2 miles of Winchester. Assisted bathrooms and wet rooms in care settings need sanitary sealant that stays cleanable. We plan the work with the manager so residents are disturbed as little as possible. Winchester is about 61 miles from central London. Business park offices have washrooms in daily use by staff, and resealing in phases keeps facilities available.

Toilets at colleges like Peter Symonds College (0.8 miles north of Winchester) take heavy use from students and staff alike. In a centre such as Moorside Retail Park, 1.1 miles north-east of Winchester, public washrooms are resealed a block of facilities at a time. Clinical washrooms at sites like Royal Hampshire County Hospital, 0.6 miles west of Winchester, are scheduled with the ward so the room is out of use for as little time as possible.

Winchester is in Hampshire. Winchester sits inside our coverage, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Winchester is one of 723 places in Hampshire on our list for washrooms and wet areas. Sites around Southampton have their own page, roughly 10 miles from Winchester.

Business premises anywhere in SO22, SO23, SO32 and SO21 are within our area. If your site is on The Square, Market Street and Market Lane or close by, send details and we will quote for washrooms and wet areas. You’ll find Winchester on or near the A31 and A32, so getting applicators and materials to site is simple. Sites close to Winchester are covered too, including Bar End (1 mile south-east), Highcliffe (1 mile east), Hyde (1 mile north), St Cross (1 mile south) and Stanmore (1 mile south-west). A short drive away, we cover Eastleigh (6 miles south), Fareham (15 miles south), Andover (13 miles north-west), Totton (13 miles south-west), Chandler's Ford (6 miles south-west) and Hedge End (10 miles south). Winchester ranks among the main centres of Hampshire, with offices, shops, schools and other public and commercial buildings, and we cover them all.

Around Winchester

Locally, jobs take us to sites close to Peter Symonds College, The Green Man pub and Leigh House Hospital, among other places. Winchester’s nearest station is Winchester station, roughly 0.6 miles north. A little further out are Winchester City Museum (less than half a mile north-east) and St John's Rooms And Chapel (less than half a mile east). For a walk, there’s Winnall Moors and Twyford Down.

Map of Winchester © OpenStreetMap contributors

What sets the cost

To price the job, we consider:

  • The size and state of each joint
  • Travel to remote or island sites
  • Quantities, in metres or numbers
  • Whether the work must be split into stages

What a job costs comes down to the quantity of joints, how much old material needs removing and the access. Call for a fixed quote when you are ready.

Sending details for a quote

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

  • Any specification or named product
  • When you need the work done
  • Drawings or a marked-up plan, if available
  • A wide shot and a close-up of the area

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. For smaller jobs, photos and a description will do.

Accreditations

Trusted. Accredited. Insured.