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 West Heath, Greater London

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

  • Leaks at window and door perimeters
  • The same joint failures repeated across a portfolio
  • Cracked, hardened mastic round windows on a block
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
Constructionline member
Fully insured: £5m PL

Need mastic sealing in West Heath?

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Questions we are asked in West Heath

Can work in a care setting near West Heath go ahead while residents are there?

Yes, with the manager deciding the order and timing of rooms. Any site rules, from signing in to infection control, are agreed before we start.

Do you work for managing agents with blocks near Abbey Wood station?

Yes. Managing agents, landlords, property factors and housing associations are who this service is for. We work to your notice and access arrangements.

Do you guarantee the mastic work?

Every building we reseal has a 12-month guarantee. It applies to our workmanship rather than damage or problems with the frames.

How do you reach windows on upper floors?

We talk through access for each building when we quote. Tell us the number of storeys and whether scaffold or other access is planned and we’ll confirm the approach in the quote.

Which sealant will you use?

Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.

How long does a typical visit take?

We plan the time on site around your programme and access. We’ll give you an estimate of time on site when we quote.

Do you seal on top of existing sealant?

No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.

How we handle mastic sealing in West Heath

Blocks are lived in, so access and disruption have to be thought through. Dates, areas and the order of work are agreed with you in advance so you can let residents know what is happening. Communal entrances and stairs stay usable while we work. If you have worn sealant at communal door frames and leaks at window and door perimeters, we can put it right, whatever the surface. A single leaking joint is often how a building in West Heath first comes to us: we look at the rest while we’re there and tell you what we find.

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.

A 12-month guarantee applies to all our work. If an installation problem shows up, phone 01277 525 020 or email a schedule or drawings and we will arrange a return visit.

The Mastic Doctor team beside their liveried vans in front of an office building
Place
West Heath (DA7, DA16, SE2)
Region
Greater London
Guarantee
A 12-month guarantee
Price
Fixed quote, scope in writing
Phone
01277 525 020
Last updated
3 November 2026

How the job changes by surface

Window and door perimeters on blocks

Frames vary from uPVC to aluminium and timber, and the product is matched to the frame material and the masonry. We will confirm the colours available for the specified product.

Estate-wide resealing programmes

Consistent products and colours across an estate make future maintenance simpler.

Aftercare for building managers

To get the most from the new sealant:

  • Check the asbestos register before any old mastic is disturbed
  • Group repairs into a planned programme
  • Keep bins and bikes away from communal door frames
  • Make it easy for occupiers to report draughts

Add mastic joints to your cyclical inspections. Check for splits, open joints, brittle mastic and lifting edges, and note the building and elevation.

Mastic fails gradually, then all at once in a wet spell. Resealing when cracking first shows avoids water damage and saves internal repairs.

Mastic sealing in West Heath: the local picture

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. Two care or nursing homes sit less than 2 miles from West Heath. Frame mastic on care buildings is best renewed elevation by elevation, with the manager deciding timings.

If you manage student housing near a university such as University of Greenwich Avery Hill Campus, 2.9 miles south-west of West Heath, the summer turnaround is the time for mastic. Blocks of flats and mixed-use buildings often cluster around stations such as Abbey Wood station, 1 mile to the north of West Heath, and their window and balcony mastic tends to age at the same rate across a building.

West Heath is about 1 mile north-east of Welling, in Greater London. We cover commercial sites throughout West Heath. Across Greater London, 764 places are covered, West Heath among them. We also cover London, around 10 miles from West Heath.

We take on mastic joints across the DA7, DA16 and SE2 postcode area, whatever the building. We cover commercial and managed buildings on Hurst Lane, Hadlow Road and Denton Road and the roads nearby. With the A206 nearby, West Heath is easy to get to with materials and equipment. Just outside West Heath, we also work in Abbey Wood (1 mile north-west), Crook Log (1 mile south), Lessness Heath (1 mile north-east), Upton (1 mile south) and Bexleyheath (1 mile south-east). Further afield, our area takes in London (10 miles west), City of Westminster (12 miles west), Marylebone (12 miles west), Kensington (14 miles west), St Pancras (11 miles west) and Shoreditch (9 miles west).

What’s near West Heath

Recent enquiries here include premises near Co-op pub, Lesnes Abbey Woods and Welling School and the streets around them. The nearest railway station is Abbey Wood station, about 1 mile north. Nearby you’ll also find Broadway Shopping Centre (1.7 miles south-east) and Bexley Hospital (1.4 miles south). Green spaces nearby include Crossness Nature Reserve.

Map of West Heath © OpenStreetMap contributors

What sealant work can’t fix

We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:

  • Broken glass or failed sealed units
  • Substrate edges that need repairing first
  • Materials that need asbestos testing before work

Not sure which it is? You can speak to us on 01277 525 020 or use the quote form and we will tell you honestly.

Joints and surfaces we work on

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

Quoting for work in West Heath

We price every job individually. The things that drive the figure:

  • Quantities, in metres or numbers
  • How much existing material needs removing
  • Backing rod, priming and other preparation
  • Whether the work must be split into stages

No two sites price the same: joint size, product, access and site hours all play a part. Send the details and a fixed figure follows.

Details that help us quote

A good diagnosis starts with the right details. Let us know:

  • The asbestos register, for older buildings
  • Drawings or a marked-up plan, if available
  • What the building is and how it’s used
  • Access details, including height

A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Share whatever details you have and we will fill any gaps with a visit.

Our process

Where the site stays busy, we agree a sequence with your contact so the disruption stays in one area at once. Each area is protected, prepared and sealed, then handed back before we move to the next. For a job in West Heath, access comes first. Give us the hours we can be on site and we’ll schedule to suit.

  1. Each block or building is walked and the failed joints recorded with the likely cause.
  2. You get a fixed quote, priced per building where that helps your budgeting.
  3. The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
  4. Old sealant is stripped and each face prepared back to firm material.
  5. Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
  6. Completed joints are inspected and carry a 12-month workmanship guarantee.

Before we start on site

  • Warn occupants and staff about the work
  • Confirm the product named in the specification
  • Send asbestos survey details if the building is pre-2000

Get a fixed quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. For smaller jobs, photos and a description will do.

Ask for a quote

Advice

When to call us in West Heath

The edges of the material itself sometimes break away for example where render or brick edges crumble. We’ll tell you if the joint edges need repairing before resealing.

It’s worth sending us details if you spot any of the following:

  • Brittle perimeter mastic across a building
  • Movement joints with sealant missing
  • Damaged joints in communal entrances and corridors
  • No planned programme for sealant

Site managers at schools like Hillsgrove Primary School can fit frame mastic into the summer works.

Before you book anyone

  • How the joint faces will be prepared and primed
  • Will RAMS and insurance details be available?
  • The terms of the workmanship guarantee
  • Their public liability cover

Choosing a commercial sealant contractor

Accreditations

Trusted. Accredited. Insured.