Washroom Sealing contractors in Custom House
Our CSCS-carded applicators take on sealing in commercial washrooms, showers, kitchens and wet areas in Custom House and the surrounding area. Send photos or drawings for a fixed quote.
- Open joints at the base of cubicle panels
- Split or peeling sealant at shower trays
- A new bead over an old one coming away
Washroom sealing across Custom House
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Surface by surface
Showers and trays
Shower trays move under foot and are wet all day. Tray joints are where many washroom leaks start.
Kitchens and tea points
Staff kitchens and tea points have joints at worktops, sinks and splashbacks. Sealed joints leave no gaps for food and dirt.
About our washroom sealing in Custom House
Closing all the facilities in a building isn’t an option. Work is phased by room or by section, so there are always facilities in use. Tell us your site hours and access windows and we will plan around them. Site teams most often ask us about stained or open joints at kitchen sinks and worktops and sealant stained black around basins and showers, across urinals and WCs, IPS panels and cubicles and accessible toilets and changing rooms. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, the work in Custom House is the same: the right product in a properly prepared joint.
Building managers in Custom House usually need some facilities open throughout. We work through washrooms floor by floor or core by core, at times agreed with you.
Work we carry out in Greater London comes with a 12-month guarantee. Should something we installed fail, phone 01277 525 020 or send details through our quote form and we’ll come back to it.
- Place
- Custom House (E16, E13)
- Wider area
- Greater London
- Guarantee
- A 12-month guarantee
- Quotes
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Questions about Custom House
Will you plan work around the academic year at somewhere like Ravensbourne University London?
Yes. We plan campus work around teaching, exams and residence turnarounds. Let us know which documents your site asks for, and we will confirm them alongside the quote.
Is hospital work, at somewhere like Newham University Hospital, something you do?
Yes. We work in healthcare settings as well as offices and schools. Each area is agreed with the ward or department and the estates team in advance.
How much does the work cost?
There isn’t a price list, as every site differs. With photographs or drawings, we can give you a fixed quote.
What guarantee comes with washroom resealing?
There is a 12-month guarantee on our workmanship, and we carry public liability insurance.
Can you quote from photos?
Photos, drawings or a schedule are often enough to quote. If the job needs a look first, we’ll arrange a visit.
Can the sealant be colour-matched?
That depends on the product. Some ranges offer many colours, others very few, so we’ll confirm the colours available for the specified product with the quote.
Do you have public liability insurance?
Yes. Mastic Doctor is fully insured, public liability included.
Busy facilities in and around Custom House
Custom House has six care or nursing homes no more than 2 miles away. In care settings, wet rooms, assisted bathrooms and en suites rely on clean, sound sealant. Each room is kept out of use only as long as the sealant needs. Custom House has plenty of hotels close by, all within 2 miles. En suite bathrooms, staff changing rooms and kitchens all need their sanitary silicone renewed in time. Rooms are done in turn so most stay available.
At a hospital like Newham University Hospital, 1 mile north of Custom House, patient and staff washrooms are best done in short phases agreed with the ward. At a university such as Ravensbourne University London, 1.1 miles to the west of Custom House, summer is the usual window for resealing residence bathrooms. Toilets at colleges like Newham College London, 1.6 miles north of Custom House, take heavy use from students and staff alike.
Custom House is about 1 mile south of Canning Town, in Greater London. Across the E16 postcode area, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. Custom House is one of 764 places in Greater London on our list.
Business premises anywhere in E16 and E13 are within our area for washrooms and wet areas. If your site is on Tree Road, Ethel Road and Booth Road or close by, we can quote for washrooms and wet areas. With the A1020 nearby, Custom House is straightforward for us to reach. Nearby places we also cover include West Silvertown (1 mile south-west), Silvertown (1 mile south), Canning Town (1 mile north), Royal Docks (1 mile east) and Limmo Peninsula (1 mile west) for washrooms and wet areas. Further afield, our area takes in London (5 miles west), City of Westminster (8 miles west), Marylebone (8 miles west), Kensington (10 miles west), St Pancras (6 miles west) and Shoreditch (5 miles west).
Landmarks near Custom House
In Custom House, that means premises near Thames Barrier Park, The Royal Docks Community School and Royal Docks Academy, among other places. Custom House has its own railway station: Custom House station. Nearby you’ll also find Gallions Reach Shopping Park (2.2 miles east) and Charlton Athletic Museum (1.5 miles south). Not far away are Gilbert's Pit and Tower Hill.
General trades versus a specialist
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
For most general trades, sealant is a sideline. 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.
Quoting for work in Custom House
To price the job, we consider:
- Site requirements such as inductions and permits
- Removal of failed or old sealant
- Specialist products, such as fire-rated or hygienic sealants
- Whether the work must be split into stages
We don’t publish prices, because the scope varies so much from one building to the next. For a fixed figure, call for a quote.
Details that help us quote
Whether it’s one area or a whole building, these details speed things up:
- How the joints are reached, and at what height
- When you need the work done
- Any specification or named product
- Where the site is, with the postcode
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, speak to us on 01277 525 020 or send details through our quote form.
Commercial clients in Custom House
Whether you’re a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.
When you manage a building on behalf of an owner, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.
Our process
Inspect, seal, sign off: that’s the shape of every visit. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and the job ends with a walk round and sign-off. For a job in Custom House, access comes first. Give us the hours we can be on site and we’ll schedule to suit.
- We start by inspecting the fittings and joints and flagging problems sealant can’t solve.
- The phasing is agreed so there are always facilities open.
- We strip out the old bead and clean off the residue left behind.
- 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.
- Rooms reopen after the product’s cure time, and we move to the next.
Getting the site ready
- Send your site hours and access windows
- Warn occupants and staff about the work
- Explain the parking and delivery arrangements
Ask for a quote
Tell us about the building, the joints and when you need the work done, and we will put a fixed quote together. The easiest way is to give us a call on 01277 525 020 or use the quote form.
Advice
What happens if it’s left?
Cleaning mouldy sealant only masks it, but the mould is rooted in the silicone and comes back. A full reseal deals with it and cleaners stop fighting a losing battle. Failed sealant in a building in Custom House can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Putting it right early is less disruptive than dealing with the consequences.
Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you’ll have a fixed figure to work with.
Why clients in Custom House choose us
- Workmanship guaranteed for 12 months
- One number for every site we cover
- Matching to RAL references, product permitting
- Coloured sealants to suit the setting, where available
Take a look at what affects the cost and how we’re accredited.