Balham washroom sealing
Sealing in commercial washrooms, showers, kitchens and wet areas in Balham and across Greater London. CHAS accredited and fully insured, with a 12-month guarantee.
- Failed sealant in a tea point or staff kitchen
- Shower tray joints that have opened up
- Sealant laid over old silicone and now peeling
Washroom sealing in Balham
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Looking after the joints
After handover, a little attention goes a long way:
- Keep a record of which washrooms need attention
- Add sealant joints to planned maintenance checks
- Clear standing water from shower floors where possible
- Avoid scourers and harsh descalers on silicone
Ventilation is half the battle. Constant damp lets mould take hold even on anti-mould grades so report fans that aren’t working to your building services team.
A few failed joints can be resealed with hardly any disruption. Left until every washroom is affected, it becomes a bigger programme and more closures to manage.
How we handle washroom sealing in Balham
For clinics, hospitals and care homes, sealed joints matter for infection control as much as appearance. Your estates and infection-control requirements, and any permits the site uses, shape how we work. Tell us what records you need and we’ll confirm with the quote. Site teams most often ask us about failed joints along IPS and cubicle panels and resealing that didn’t last because the old bead stayed, across vanity units and basins, urinals and WCs and showers, trays and wet room floors. A specialist sealant contractor works differently from a general builder: in Balham, that means joint design, primers and backing rod as standard.
Washrooms in London offices, hotels and gyms are used hard from morning to evening. Mouldy or split sealant at vanity tops, IPS panels and urinals is replaced with anti-mould sanitary silicone, in phases so some facilities stay open.
Building owners and contractors get the same cover: a 12-month guarantee on our workmanship. It doesn’t extend to damage, faults in the building or work by others, and we’re upfront about that.
- Where
- Balham (SW12, SW17, SW4)
- Wider area
- Greater London
- Cover
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
What sets the cost
Quotes vary with the job. Expect it to depend on:
- Which sealant the job calls for
- Any access equipment needed
- Quantities, in metres or numbers
- The site’s rules and procedures
What a job costs comes down to how many linear metres there are, how much old material needs removing and the access. Call for a fixed quote when you’re ready.
What to include in your enquiry
A good diagnosis starts with the right details. Tell us:
- The asbestos register, for older buildings
- The postcode of the building
- What the building is and how it’s used
- Any dates the work must fit around
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To start the process, speak to us on 01277 525 020 or email us.
From enquiry to sign-off
Tell us your site hours and access windows and we will plan around them. On the day, the work area is kept contained and tidy, and we check in with your contact before moving on to each new area. Planning a London job such as one in Balham starts with access. Send the building rules and access times with your enquiry.
- Every washroom is checked joint by joint, with loose panels, leaks or damp noted for the right trade.
- The phasing is agreed so there are always facilities open.
- Failed silicone is removed completely and the surfaces cleaned of every trace.
- Joints are cleaned, degreased and dried before sealing.
- A bead of anti-mould sanitary silicone goes in and is tooled to a smooth, cleanable profile.
- Each room is handed back once the sealant has had its cure time.
Getting the site ready
- Agree which areas must stay open
- Arrange parking or a loading space
- Send any specification or drawings in advance
Get a fixed quote
Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we’ll return a fixed quote that you can work with. If you have questions first, ring 01277 525 020 or email drawings and photos.
Related advice
Also in Balham
Common questions from Balham clients
Can work at a site such as University of the Arts London fit around teaching?
Yes. Tell us the term dates, vacation periods and access windows, and we will plan the work around them. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.
Do you take on work at healthcare sites like Springfield University Hospital?
Yes. Healthcare sites are among the places we work. We follow the site’s permits, sign-in and infection-control procedures in every area.
Which silicone is right for commercial washrooms?
Each area gets the grade that suits it. Washrooms and showers take anti-mould sanitary silicone while kitchens may need a food-safe grade.
How many days will you need on site?
We plan the time on site around your programme and access. You will have an expected duration with the quote.
Are you CHAS accredited and on Constructionline?
Yes. Mastic Doctor is CHAS accredited and a Constructionline member.
Is it possible to just clean mouldy silicone?
Not for long. Mould grows into the sealant itself, so it comes back however often it’s cleaned. Replacement is the lasting fix.
Is there a guarantee on the work?
Every job carries our 12-month guarantee. It covers our workmanship rather than damage, leaks from plumbing or ventilation problems.
When something else is needed
Our job is the joint, not everything around it. Sealant alone won’t deal with:
- A dripping waste or valve behind a panel
- Mould caused by poor ventilation, which will return until the extract is fixed
- Water escaping beneath the floor rather than through a joint
Not sure which it is? You can call 01277 525 020 or email drawings and photos and we will tell you honestly before you book.
What we seal
- Kitchens and tea points
- Vanity units and basins
- Showers, trays and wet room floors
- Accessible toilets and changing rooms
- IPS panels and cubicles
- Urinals and WCs
General trades versus a specialist
There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and we’ll confirm the paperwork you need with the quote.
Redoing a failed joint usually costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.
Building owners, agents and FMs in Balham
Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Balham can form part of a wider programme across Greater London.
If you look after buildings for someone else, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.
Commercial washrooms in Balham
A London building with hundreds of occupants can’t lose every washroom for a day, which is why the work is split into phases agreed in advance. There are six care or nursing homes within about 2 miles of Balham. In care settings, wet rooms, assisted bathrooms and en suites rely on clean, sound sealant. Rooms are done a few at a time at times agreed with the home.
Healthcare washrooms on sites such as Springfield University Hospital, 0.9 miles south-west of Balham, are resealed area by area, under the site’s own infection-control rules. Welfare facilities in units on estates such as Zennor Road Industrial Estate, less than half a mile east of Balham, have showers, toilets and kitchens with sealant that works hard. At a college such as St Francis Xavier Sixth Form College, 0.6 miles to the north of Balham, washroom and kitchen sealant is best renewed in the holidays or in phases during term.
Balham is about 2 miles south-west of Stockwell, in Greater London. Anywhere in SW12, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. We work across 764 places in Greater London.
Postcode districts covered here: SW12, SW17 and SW4 for washrooms and wet areas. Buildings on Lynn Road, Weir Road and Byrne Road are within our area. We also cover Grange Mills (1 mile north-east), Hyde farm estate (1 mile east), Clapham Park (1 mile north-east), Streatham Park (1 mile south-east) and Tooting Bec (1 mile south-west). Bigger towns within reach include London (5 miles north-east), City of Westminster (5 miles north), Marylebone (5 miles north), Kensington (4 miles north-west), St Pancras (6 miles north) and Shoreditch (7 miles north-east).
Near you in Balham
Around Balham, our work takes us to commercial buildings near Oak Lodge School, Wandsworth Common and The Bedford pub. Balham has its own railway station: Balham station. Well-known places in the area include St James' Hospital (0.5 miles west) and London Sewing Machine Museum (0.6 miles south-west). Green spaces nearby include Knight's Hill and Battersea Park Lake.