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

Mastic sealing for building owners and managing agents in Stockbury, Kent

Work needed on a mastic joint in Stockbury? We look at it, seal it with the right product and hand it over with a 12-month guarantee.

  • Old repairs sealed over failed mastic
  • Failed external movement joints
  • Damp patches beside frames
1
Send details
Tell us about the site, with photos if you have them.
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
Backed by a 12-month workmanship guarantee.
South East, London & Scotland
Constructionline member
Fully insured: £5m PL

Need mastic sealing in Stockbury?

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Surface by surface

Estate-wide resealing programmes

An estate of similar buildings suits a rolling programme. We quote building by building and work through them in turn.

Communal areas

Joints at low level in communal areas take knocks from bins, bikes and buggies and tend to fail first.

How we handle mastic sealing in Stockbury

Blocks are lived in, so access and disruption have to be thought through. The sequence, the areas and the dates are settled with you so you can let residents know what is happening. Communal entrances and stairs stay usable throughout. The enquiries we see most involve cracked, hardened mastic round windows on a block and damp patches beside frames, across external wall and movement joints, shopfronts below residential blocks and window and door perimeters on blocks. Most enquiries from Stockbury start with one failed joint and grow into a wider look at the building: we look at the rest while we’re there and tell you what we find.

For buildings around smaller places like Stockbury, we group work so one trip covers it. Photos of each elevation help us quote accurately.

What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

The Mastic Doctor team standing beside their branded vans outside an office building
Place
Stockbury (ME9)
Region
Kent
Cover
A 12-month guarantee
Quotes
Quoted before any work starts
Call
01277 525 020
Last updated
3 November 2026

Doing it in-house

Redoing a failed joint usually costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

What sealant work can’t fix

Our job is the joint, not everything around it. On its own, sealant can’t deal with:

  • Glazing that needs replacing
  • Failed window or door frames, which need a window contractor
  • Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first

If in doubt, give us a call on 01277 525 020 or email the details over and we will say what we think.

Where we work in Stockbury

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

For managing agents and facilities managers

Agents, factors and owners’ representatives all follow the same route: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.

FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we’ll confirm with the quote.

Questions about Stockbury

Do you cover business parks and estates near Stockbury, such as Newington Industrial Estate?

Yes. We cover Stockbury and the area around it, including industrial estates, business parks and retail parks such as Newington Industrial Estate. To start, just call the office on 01277 525 020 or send photos by email with the unit, the joints involved and your access times.

Is Stockbury too small for you to travel to?

No. Places such as Stockbury are covered as much as the big towns. Our area covers London and the South East counties. Where we can, we group nearby jobs to make the most of each trip.

How long will the new sealant last?

Nobody can honestly give a figure in years, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular inspection is the best way to catch problems early.

Do you work for managing agents and housing associations?

We do. Managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios are our main clients for this work, and we quote building by building or as a programme.

Do you guarantee the mastic work?

A 12-month guarantee covers our work. It covers our workmanship, not later building movement, damage or frame failures.

What if the old mastic contains asbestos?

In older buildings, old mastic can contain asbestos. We ask for the asbestos register or survey before work starts, and if it’s suspected, work stops until it’s tested.

Is it fine to apply new sealant on top of old?

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

Our process

Before we leave any area, we remove the tape, clean down and inspect every joint. Where the sealant needs time to cure before use, we tell you and sign the area. Smaller jobs around Stockbury can be grouped with others nearby, which keeps travel down. You will have a fixed quote before work starts.

  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 programme is fixed with you, including dates you can pass on to residents or tenants.
  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. Each building is checked on completion and the work carries our 12-month guarantee.

Getting the site ready

  • Tell us your opening times and when work is allowed
  • Send asbestos survey details if the building is pre-2000
  • Have the specification and drawings to hand

Ask for a quote

Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price the work to it. For smaller jobs, photos and a description will do.

Ask for a quote

Related advice

Frames, entrances and external joints in Stockbury

Central London is about 34 miles from Stockbury. Around the capital’s commuter belt, managing agents look after many blocks close to stations and town centres. The South East is one of the drier parts of the UK. External mastic still waits for dry faces and the right temperature, and elevations facing the sun and the prevailing weather are normally where frame mastic ages first.

If you look after a block within reach of Newington station, which lies north-east of Stockbury, frame and balcony mastic can be renewed on one programme. Student blocks close to universities like Canterbury Christ Church University (to the south of Stockbury) are easiest to work on between tenancies.

Stockbury is about 4 miles west of Sittingbourne, in Kent. Looking for mastic sealing in Stockbury? We can help. Stockbury is one of 931 places in Kent on our list for mastic joints. Our London page has more on work in that area, about 34 miles away.

Business premises anywhere in ME9 are within our area for mastic joints. Buildings on The Street, Hill Green Road and Harrow Court are within our area. Close to Stockbury, our area also takes in Yelsted (1 mile west), South Green (1 mile south-east), Hartlip (1 mile north), Lower Hartlip (1 mile north) and Danaway (2 miles north-east). Further afield, our area takes in Maidstone (6 miles south-west), Sittingbourne (4 miles east), Gravesend (13 miles north-west), Faversham (11 miles east), Northfleet (15 miles north-west) and Minster (9 miles north-east).

Local landmarks in Stockbury

In Stockbury, that means premises near The Three Squirrels pub and Stockbury Hill Wood, among other places. For rail, the closest station is Newington station, about 2.2 miles north-east of the centre. Other landmarks nearby include Bayford Court (4.6 miles east) and KIMS hospital (4.5 miles south-west). Not far away are Detling Hill.

Map of Stockbury © OpenStreetMap contributors

What we are called out for in Stockbury

Much failed sealant was laid on dirty, dusty or damp surfaces. Without clean, sound faces and a primer where the product needs one it comes away from one face.

These are often picked up first by site or facilities staff:

  • Failed external movement joints
  • Damp patches beside frames
  • Worn sealant at communal door frames
  • A mix of products and colours from past repairs

Landlords with units on estates such as Newington Industrial Estate, 2 miles to the north of Stockbury, can bring frame, door and external mastic across several units into one programme.

Questions to ask before you book

  • Who will actually carry out the work
  • The named product and why it was chosen
  • What the guarantee covers, and for how long
  • How joint depth will be controlled

Questions to ask before you appoint anyone

Accreditations

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