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 Bromley-by-Bow, Greater London

Mastic sealing for building owners, managing agents and housing associations across Bromley-by-Bow, by CSCS-carded applicators. CHAS accredited and fully insured.

  • Complaints coming in block by block
  • A mix of products and colours from past repairs
  • Damp patches beside frames
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
Constructionline member
£5m public liability

Mastic sealing in Bromley-by-Bow

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

Mastic sealing in Bromley-by-Bow, done properly

Older blocks and commercial buildings can have mastic that contains asbestos. We check the asbestos register or survey before any old sealant is cut out, and work stops for testing if there’s any doubt. Removing asbestos-containing material isn’t something we do. We work on balcony and threshold joints, communal entrances and stairwells and window and door perimeters on blocks, and what we are called in for most is no planned programme for sealant and damp patches beside frames. For commercial sealant work in Bromley-by-Bow, you deal with one contact from quote to sign-off, whether it’s one building or several.

Planning mastic work on a London block means notices to residents, access to flats and agreed working areas. We work to the agent’s notice and access plan, so residents know what’s happening.

Whoever the client is, the cover is the same: a 12-month guarantee on our workmanship. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.

Mastic Doctor team members lined up next to their branded vans outside an office building
Where
Bromley-by-Bow (E3, E14, E15)
Region
Greater London
Cover
12 months on our workmanship
Price
Fixed quote, scope in writing
Call
01277 525 020
Updated
3 November 2026

FAQs: Bromley-by-Bow

Will you take on a block within reach of West Ham station?

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

Can you cope with the access rules in a London building?

Yes, we plan every London job around the building’s own access rules. The building manager’s rules go straight into our method. The ULEZ covers the whole of Greater London, which we allow for

Do you work with property factors and landlords?

Yes. Managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios are our main clients for this work and work can be quoted per building or as a whole.

Do you seal on top of existing sealant?

No, never. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.

How long does a job like this take?

The duration is planned around your programme and the access we’re given. We’ll give you an estimate of time on site when we quote.

Will residents or tenants be disturbed?

Residents and tenants carry on as normal. If any flats or units need access, we will tell you in advance so it can be arranged.

Do you work to architects’ specifications?

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.

What sealant work can’t fix

A proper diagnosis includes knowing what sealant can’t do. We’ll tell you if the real problem is one of these:

  • Leaks from above rather than through a joint
  • Masonry that has broken away beside the joint
  • Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first

If you are not sure, just ring 01277 525 020 or send details through our quote form and we’ll give you a straight answer before you book.

Surfaces we seal

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

For owners and agents in Bromley-by-Bow

Blocks in London are normally run by managing agents, landlords or housing associations, with residents to notify and access to arrange. Our programme follows the access you agree with residents. The 2 miles around Bromley-by-Bow include 10 care or nursing homes. Owners of care premises can bring window and door mastic into a phased programme planned around the home.

Site managers at schools like St Agnes RC Primary School can fit frame mastic into the summer works. If you own or manage units on a site such as Bow Enterprise Park, under half a mile to the south of Bromley-by-Bow, failed mastic on frames, door surrounds and external joints can be dealt with unit by unit. If you manage student housing near a university such as University of Cumbria in London, which lies south of Bromley-by-Bow, the summer turnaround is the time for mastic.

Bromley-by-Bow is about 2 miles east of Whitechapel, in Greater London. Looking for mastic sealing in Bromley-by-Bow? We can help. We work across 764 places in Greater London.

Commercial sites across E3, E14 and E15 are covered for mastic joints. We cover commercial and managed buildings on Bow Road, Bruce Road and Edgar Road. If your building is just outside Bromley-by-Bow, we cover Three Mills (1 mile north-east), Mill Meads (1 mile north-east), Bow Common (1 mile south-west), Mile End (1 mile west) and Bow (1 mile north-west). Further afield, our area takes in London (4 miles south-west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (4 miles west) and Shoreditch (3 miles west).

Near you in Bromley-by-Bow

Recent enquiries here include premises near Bob's Park, East London Arts & Music and Bow School. Bromley-by-Bow’s nearest station is West Ham station, about 1 mile east of the centre. Nearby you will also find Tower of London (2.8 miles south-west) and Stratford Centre (1.4 miles north-east). Not far away are Old Ford Island and Tower Hill.

Map of Bromley-by-Bow © OpenStreetMap contributors

What the job involves on each surface

Communal areas

We keep entrances and stairs open throughout. Work is planned in sections.

Tenement and older buildings

Natural stone can be marked by the wrong sealant and we choose accordingly.

Work for main contractors and building owners

We work for building owners and managing agents on everything from one building to a spread of sites. One quote can cover more than one site, so there’s one set of paperwork to deal with.

For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules.

Aftercare for building managers

A few simple habits keep the new joints working:

  • Keep bins and bikes away from communal door frames
  • Track which buildings were done and when
  • Mention RAMS, insurance or CSCS requirements up front
  • Plan resealing building by building rather than complaint by complaint

If a joint we sealed fails within 12 months, tell us and we will look at it. After that, regular inspection keeps the programme on track.

Leaks at window perimeters spoil finishes and can affect frames. Resealing early keeps the job small.

Should maintenance staff do it?

Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.

Redoing a failed joint typically costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.

How a job runs

A typical day starts with protection: tape along each joint edge and covers over finishes, stock and equipment close by. On site, the work normally takes anything from a day to a few weeks, depending on the number of buildings and joints, and our waste is bagged and taken away as we go. For a job in Bromley-by-Bow, access comes first: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Send the building rules and access times with your enquiry.

  1. First we look at the mastic on each building and note what needs replacing.
  2. A fixed quote follows, split by block or building if that suits you.
  3. Dates, areas and access are agreed so residents or tenants can be told in advance.
  4. We remove the old mastic completely and clean the joint faces back.
  5. Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
  6. Finished joints are looked over and the 12-month guarantee confirmed.

Getting the site ready

  • Share your working hours and any access restrictions
  • Send any specification or drawings in advance
  • Tell us which areas need to stay in use

Quotes

To get a fixed quote, speak to us on 01277 525 020 or email drawings and photos. You can also send details through our quote form.

Ask for a quote

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