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

Mastic sealing for building owners and managing agents in Soho, Greater London

Mastic sealing for building owners, managing agents and housing associations in Soho. CHAS accredited and fully insured, with a 12-month guarantee.

  • Mastic failing across several blocks on an estate
  • Damp patches beside frames
  • Draughts at frames across a block
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Mastic sealing near Soho

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

Aftercare for building managers

After handover, these steps help:

  • Check the asbestos register before any old mastic is disturbed
  • Group repairs into a planned programme
  • Check sealant joints during planned building inspections
  • Make it easy for occupiers to report draughts

Protect entrance and corridor joints from knocks where possible. Knocks cause many early failures in communal areas.

The longer failed joints are left, the more likely the substrate edges break up. Then the edges may need repairing first.

Mastic sealing in Soho, done properly

Owners and agents typically inherit a building’s mastic rather than choose it, and it ages quietly: it sits round windows and doors, along external joints and through communal areas. When it hardens, splits or pulls away, water and draughts follow, and occupiers start reporting it. If you have failed external movement joints and complaints coming in block by block, we can help. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Soho is the same: failed joints cut out, faces prepared and the right sealant laid to the right depth.

London has a large stock of purpose-built blocks, mansion flats and converted buildings managed by agents and housing associations. Mastic around windows, doors and balconies tends to fail across a whole block at a similar time.

The 12-month guarantee covers our workmanship: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

Place
Soho (W1F, W1T, W1D)
Wider area
Greater London
Guarantee
12 months on our workmanship
Price
A fixed quote before we start
Telephone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

How the job changes by surface

External movement joints

Brickwork, blockwork and panel joints let a building move. Failed sealant in a movement joint lets water in.

Communal areas

Low-level communal joints get damaged more than most, so they often need renewing sooner.

For managing agents and facilities managers

Hotels, schools, healthcare sites, offices and retail units book us directly too. The work is planned around how the building runs, so the building keeps working while we do.

FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.

From enquiry to sign-off

When we get to site, we sign in, go through any site induction and check how permits are handled. Everything around the joints gets protected before any cutting starts, and the work usually takes anything from a day to a few weeks, depending on the number of buildings and joints. In Soho, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.

  1. First comes a look at the joints and, for older buildings, the asbestos records.
  2. The products and programme are set out in a fixed quote.
  3. Failed mastic is removed completely.
  4. The joints are prepared and resealed with the right product.
  5. We finish each building before moving to the next.

What we need from you

  • Confirm the product named in the specification
  • Tell us your opening times and when work is allowed
  • Tell staff and tenants when we’ll be in

Ask for a quote

We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, phone 01277 525 020 or email us.

Get a quick quote

Read more

Planned mastic for Soho portfolios

For a London block, the agent or landlord usually handles notices to residents and access to flats. We fit the programme to your notice periods.

If you manage student housing near a university such as University of Notre Dame, which lies south of Soho, the summer turnaround is the time for mastic. If you own or manage units on a site such as Grand Vitesse Industrial Estate (1.4 miles south-east of Soho), failed mastic on frames, door surrounds and external joints can be dealt with unit by unit.

Soho is about 1 mile east of City of Westminster, in Greater London. Looking for mastic sealing in Soho? We can help, as we do across Greater London. Our Greater London coverage takes in 764 places, large and small.

Postcode districts covered here: W1F, W1T and W1D for mastic joints. Among the streets we cover are Duck Lane, Drury Lane and Bridle Lane, and sites on any of them can send details for a fixed quote. Main routes into Soho include the A4 and A301, useful when we plan access and materials. Just outside Soho, we also work in West End (1 mile east), Chinatown (1 mile south), Seven Dials (1 mile east), St Giles (1 mile north-east) and St James's (1 mile south). Nearby towns on our patch include Kensington (3 miles west), Walthamstow (7 miles north-east), Whitechapel (3 miles east), Hampstead (3 miles north-west), Ruislip (13 miles west) and Stockwell (3 miles south).

Local landmarks in Soho

Around Soho, our work takes us to commercial buildings near Bar Soho, St Anne's Churchyard and Harris Westminster Sixth Form, among other places. You will also find LITE Regal International School (0.6 miles west) and London Library (0.5 miles south-west). There’s a railway station in Soho itself: Tottenham Court Road station. A little further out are Kingly Court (under half a mile west) and Montfichet's Tower (1.3 miles east). The countryside around Soho includes St. James's Park Lake and Ludgate Hill.

Map of Soho © OpenStreetMap contributors

FAQs: Soho

Can you quote for a block close to Tottenham Court Road station?

Yes, we work for agents, landlords and housing associations with blocks of every size. We work to your notice and access arrangements.

Will you take on work at estates like Grand Vitesse Industrial Estate, close to Soho?

Yes. We cover Soho and the area around it, including industrial estates, business parks and retail parks such as Grand Vitesse Industrial Estate. A few photos and the unit address let us price the work.

Can you follow the specification on our project?

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.

How do you handle work on occupied blocks?

We plan around people living or working in the building. We agree the programme so you can notify occupiers and communal access is kept open.

Does weather matter for sealant work?

It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so we watch the forecast and rearrange outside work if we have to. Internal work is far less affected.

Which sealant will you use?

A specification, where there is one, decides it. Without one, the joint decides: its movement, its surfaces and what it has to cope with.

How many days will you need on site?

The duration is planned around your programme and the access we’re given. You’ll have an expected duration with the quote.

When something else is needed

Part of a good diagnosis is knowing where sealant stops. You will hear from us if the cause turns out to be one of these:

  • Failed window or door frames, which need a window contractor
  • Asbestos-containing sealant, which we don’t remove
  • Roof leaks, gutters or failed flashings that aren’t sealant joints

If in doubt, give us a call on 01277 525 020 or send photos by email and we’ll say what we think.

Where we work in Soho

  • Window and door perimeters on blocks
  • Shopfronts below residential blocks
  • Communal entrances and stairwells
  • Balcony and threshold joints
  • Communal kitchens and washrooms
  • External wall and movement joints

What we are called out for in Soho

Sunlight and weather break mastic down over time. It stiffens, stops stretching and cracks, especially on south and west faces.

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

  • Damp patches beside frames
  • Old repairs sealed over failed mastic
  • Damaged joints in communal entrances and corridors
  • Draughts at frames across a block

Trustees of buildings like St Anne's Church can bring frame and external mastic into a planned maintenance list.

Comparing quotes

  • Whether primer will be used where the manufacturer specifies it
  • Will RAMS and insurance details be available?
  • Can the work be phased to keep areas open?
  • Health and safety accreditation such as CHAS

How to choose a sealant contractor

Accreditations

Trusted. Accredited. Insured.