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

Washroom Sealing in Thorney Island

Planning work on a washroom in Thorney Island? We look at it, seal it with the right product and hand it over with a 12-month guarantee.

  • Resealing that didn’t last because the old bead stayed
  • Black mould inside silicone joints that cleaning can’t shift
  • Sealant lifting along a tray edge
1
Send details
Tell us about the site, with photos if you have them.
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
12-month guarantee on our workmanship.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Washroom sealing across Thorney Island

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

Washroom sealing around Thorney Island: points for this area

Thorney Island lies within about 1 mile of the sea, and places by the sea often rely on visitors, so their hotels and holiday lets see heavy seasonal use. Bathrooms turned round daily in the busy months need sound, cleanable joints, so resealing in the quieter months keeps rooms ready. Thorney Island is about 59 miles from central London. Office toilets in the commuter belt are in use from first arrivals to last departures, so we phase work to keep some facilities open.

Schools such as Thorney Island Community Primary School have toilets, changing rooms and kitchens that are best resealed in the holidays. For an occupier at a site such as Finchwood Farm Industrial Estate, 1.9 miles to the south-west of Thorney Island, the canteen and welfare facilities need cleanable joints as much as any office.

Thorney Island is about 4 miles south-east of Havant, in West Sussex. Anywhere in PO10, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. Thorney Island is one of 373 places in West Sussex on our list for washrooms and wet areas. For work in that direction, see our Portsmouth page.

We cover the PO10 postcode districts for washrooms and wet areas. If your site is on Hunter Road, Emsworth Road and Spartan Close or close by, send details and we will quote for washrooms and wet areas. Sites close to Thorney Island are covered too, including West Thorney (1 mile south-east), North Hayling (1 mile west), Tye (1 mile south-west), Northney (1 mile west) and Emsworth (2 miles north). A short drive away, we cover Bognor Regis (11 miles east), Chichester (7 miles east), Selsey (9 miles south-east), Portfield (7 miles east), Yapton (14 miles east) and East Wittering (5 miles south-east).

Local landmarks in Thorney Island

Recent enquiries here include premises near Bourne Community College and Eames Farm, among other places. The nearest railway station is Southbourne station, roughly 1.8 miles north-east. Well-known places in the area include Havant War Memorial Hospital (3.2 miles north-west) and Emsworth Museum (1.6 miles north). Open spaces near Thorney Island include Nutborne Marshes.

Map of Thorney Island © OpenStreetMap contributors

About our washroom sealing in Thorney Island

In a commercial washroom, sealant is usually the first thing to wear out. Basin tops, urinal backs, panel joints and shower trays put it under water, chemicals and daily cleaning and mould that roots into it can’t be cleaned away. We strip it out and lay new anti-mould sanitary silicone. If you have failed joints along IPS and cubicle panels and stained sealant around pans and urinals, we can put it right, on IPS panels and cubicles, showers, trays and wet room floors and accessible toilets and changing rooms alike. Searching for sealant specialists in Thorney Island? Mastic Doctor has worked for contractors, FMs and building owners since 2005, CHAS accredited and a Constructionline member.

Community buildings around smaller places like Thorney Island have kitchens and toilets used by many people. Resealing sinks, worktops and WCs with anti-mould silicone keeps them clean and watertight.

Every job we finish is backed by a 12-month workmanship guarantee. If a joint we sealed fails because of how it was installed, we come back and put it right.

Where
Thorney Island (PO10)
Wider area
West Sussex
Guarantee
12 months on every job
Price
A fixed quote before we start
Telephone
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Doing it in-house

General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.

The visible bead is only part of the job. Backing rod, primer where specified and a joint designed to move with the building are where general trades tend to cut corners.

Common problems we fix in Thorney Island

Low-level joints get hit by mop buckets, cleaning trolleys and feet, especially at floor edges and around urinals and WC pans.

Any of the following is a good reason to get the joints checked over:

  • Gaps where vanity tops meet the wall
  • Stained sealant around pans and urinals
  • Complaints from staff, guests or users about tired washrooms
  • Stained or open joints at kitchen sinks and worktops

Church halls and community buildings, such as those at The Parish Church of St Nicholas, have kitchens and toilets used by many groups, and their sanitary sealant works hard.

What your quote should include

  • The named product and why it was chosen
  • How the existing material will be dealt with
  • Are they CHAS accredited or on Constructionline?
  • The terms of the workmanship guarantee

How to choose a sealant contractor

Aftercare for building managers

Regular inspection catches problems early. In particular:

  • Keep extract fans working and vents clear
  • Act on the first split you see at a shower tray
  • Tell us about infection-control or permit rules before we quote
  • Squeegee showers and trays after busy periods

Add washroom sealant to routine inspections. Check for mould spots, splits, lifting edges and open joints at trays, basins and urinals and photograph anything new.

Leaks through tray and wet-floor joints can go unseen until a ceiling marks below. At that stage, boards or ceilings may need repair so failed joints are worth acting on quickly.

For managing agents and facilities managers

Main contractors use us as their sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules.

Hospitality, education, healthcare, office and retail clients book us directly too. The work is planned around how the building runs, so the building keeps working while we do.

Your questions answered

Can work in a care setting near Thorney Island go ahead while residents are there?

Yes. Care settings are planned area by area, at times agreed with the home. Tell us about any infection-control or safeguarding requirements and we will work to them.

Can you work on a hospital site such as Havant War Memorial Hospital?

Yes, provided the work is planned with the site’s estates team. Work is phased so departments keep running, under the site’s own rules.

How do you choose the sealant?

A specification, where there is one, decides it. Without one, the joint decides: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.

When can the area be used after sealing?

The product and site conditions decide that. Some products skin over quickly but need longer to cure fully, so we’ll confirm the curing time on the day.

Is colour matching possible?

In many cases, yes. Sealants are made in a wide range of standard colours, and matching to RAL references or nearby finishes is commonly requested. We confirm what’s available for the specified product when we quote.

What’s the quickest route to a quote?

There are four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. Step one needs little more than photos and a postcode.

Are you CHAS accredited?

Yes. We’re CHAS accredited, we’re a Constructionline member and we use CSCS-carded applicators.

How a job runs

At the end of each section, we remove the tape, clean down and inspect every joint with your site contact. Where the sealant needs time to cure before use, we tell you and sign the area. Rural sites near Thorney Island may need directions, gate codes or a contact on site. Send that with the details and we will confirm the plan with the quote.

  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. The whole of the old bead is removed.
  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

  • Point out any areas we must not close
  • Share your working hours and any access restrictions
  • Send asbestos survey details if the building is pre-2000

Ask for a quote

The quickest route to a quote is a few photographs and the site postcode. Send them through the quote form, or ring 01277 525 020 or email us to discuss it first.

Ask for a quote

Advice

How the quote is worked out

Quotes vary with the job. It mainly depends on:

  • Joint width, depth and condition
  • The site’s rules and procedures
  • Any access equipment needed
  • Removal of failed or old sealant

Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.

What to include in your enquiry

However big the job, the same details help:

  • Asbestos survey details if the building is older
  • Photos of the joints, close up and from further back
  • Rough lengths or quantities, or drawings if you have them
  • What the building is and how it’s used

Send us photos, drawings or a joint schedule and a fixed quote comes back to you. Where a site visit makes more sense, we’ll arrange one.

Accreditations

Trusted. Accredited. Insured.