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

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

Our CSCS-carded applicators take on mastic sealing for building owners, managing agents and housing associations in Kennington and the surrounding area. Send photographs or drawings for a fixed quote.

  • Damp patches beside frames
  • Failed external movement joints
  • Occupiers reporting cold air round windows
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
CHAS & Constructionline
£5m public liability

Mastic sealing across Kennington

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

About our mastic sealing in Kennington

Different joints need different sealants. Low-modulus neutral-cure silicone suits many window perimeters and external movement joints, and MS polymer sealants stick well to many substrates and often take paint. We will confirm the colours available for the specified product. The enquiries we see most involve no planned programme for sealant and movement joints with sealant missing, across communal entrances and stairwells, external wall and movement joints and communal kitchens and washrooms. Facilities teams, main contractors and managing agents in Kennington tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

Places the size of Kennington usually have some housing association stock, small blocks and mixed-use buildings. The mastic around their frames and external joints ages like anywhere else.

We stand by our work with a 12-month guarantee. That covers our preparation and application.

Location
Kennington (TN24, TN25)
Region
Kent
Guarantee
12 months on our workmanship
Quotes
Quoted before any work starts
Call
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Common questions from Kennington clients

Does your area include sites such as Eurogate Business Park, near Kennington?

Yes, sites like Eurogate Business Park are within our area, along with the rest of Kennington. Send details of the unit and the work through our quote form for a quick quote.

We manage a building near Ashford International station. Can you help?

Yes. Blocks of any size are within what we do. Photos of each elevation help us quote accurately.

What guarantee do you give on resealing?

Our workmanship carries a 12-month guarantee and we hold public liability insurance.

Will residents or tenants be disturbed?

The work is planned around occupiers. We agree the programme so you can notify occupiers, and entrances stay in use.

Do you work for managing agents and housing associations?

Yes, that’s exactly who this service is for. Buildings are scheduled in turn so you can plan around it.

Do you work in Kennington?

Yes. We take on work across Kennington, with one number for every area we cover.

Do you work to architects’ specifications?

Yes. The specification and the manufacturer’s installation guidance are what we work to, and we raise anything unclear before work begins.

From enquiry to sign-off

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. Work in places the size of Kennington is planned as a single visit where we can. Photos with rough sizes let us arrive with everything needed.

  1. We inspect the joints, building by building, and record what has failed and why.
  2. A fixed quote follows, split by block or building if that suits you.
  3. The programme is fixed with you, including dates you can pass on to residents or tenants.
  4. Failed mastic is removed and the faces taken back to sound, dry 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.

Preparing the site

  • Let us know about inductions and permits
  • Confirm the product named in the specification
  • Share the asbestos register for older buildings

Get a fixed quote

For a fixed quote, speak to us on 01277 525 020 or send details through our quote form, telling us the site location and the nature of the job. Our quote form is another easy route.

Get a quick quote

Advice

When to bring in a specialist

Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist brings efficiency, a consistent finish and a 12-month guarantee.

Putting right a botched joint often costs more than sealing it well at the start, 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.

When something else is needed

Being straight saves everyone time. New sealant won’t cure:

  • Masonry that has broken away beside the joint
  • Misted or failed double-glazed units
  • Leaks through the frame itself rather than the perimeter

If in doubt, call 01277 525 020 or send photos by email and we will say what we think before you book.

What we seal

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

Why deal with it now?

Dealing with failed joints one report at a time is slow and scattered. Planned resealing covers a whole building or estate in one go, under a single quote and a single programme. Over time, UV, weather and movement wear any sealant out. Replacing it before it fails keeps water out.

No two sites price the same: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.

Why appoint us

  • Colour agreed before work starts
  • 12-month guarantee on workmanship
  • Over 20 years of commercial sealing
  • Coloured sealants to suit the setting, where available

Read our cost guide or our accreditations.

Mastic sealing around Kennington: what changes locally

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 typically where frame mastic ages first. Kennington is about 48 miles from central London. Managed blocks of flats are a big part of commuter-belt property; their frame mastic often ages block-wide.

With historic buildings such as Godinton House, 2.3 miles west of Kennington, in the wider area, owners of older properties around Kennington should expect mastic to need a product that suits old masonry. For owners of several units at places like Eurogate Business Park (0.8 miles west of Kennington), one programme can deal with frame and external mastic across the lot. If your remit includes a building such as Kennington Church of England Academy, frame and door mastic can be programmed for the holidays.

Kennington is about 2 miles north-east of Ashford, in Kent. Any commercial site in Kennington is covered, whether it’s a single job or part of a planned programme. Kennington is one of 931 places in Kent on our list. Our London page has more on work in that area, about 48 miles away.

Postcode districts covered here: TN24 and TN25 for mastic joints. If your site is on Park Road, York Road and Ball Lane or close by, we can quote for mastic joints. Being close to the A28, Kennington is easy to get to with materials and equipment. Close to Kennington, our area also takes in Bockhanger (1 mile south-west), Potters Corner (1 mile west), Boughton Lees (2 miles north), Godinton (2 miles south-west) and Willesborough (2 miles south). A short drive away, we cover Canterbury (12 miles north-east), Sittingbourne (14 miles north-west), Folkestone (13 miles south-east), Whitstable (14 miles north-east), Faversham (10 miles north) and Hythe (11 miles south-east).

Landmarks near Kennington

Locally, jobs take us to sites close to Towers School and Sixth Form Centre, Conningbrook Lakes Country Park and The Rose Inn, among other places. Kennington’s nearest station is Ashford International station, roughly 1.7 miles south. A little further out are County Square (1.4 miles south-west) and William Harvey Hospital (2.1 miles south-east). For a walk, there’s Hatch Park.

Map of Kennington © OpenStreetMap contributors

What the job involves on each surface

Estate-wide resealing programmes

An estate of similar buildings suits a rolling programme. Each block is priced and scheduled in order.

External movement joints

The joint width has to suit the movement and the sealant’s capability with the width-to-depth ratio set as the manufacturer advises.

Maintenance after handover

Sealant joints are maintenance items, and their life depends on movement, exposure, cleaning and use. Our advice:

  • Group repairs into a planned programme
  • Check sealant joints during planned building inspections
  • List the paperwork your organisation requires when you send details
  • Have the asbestos survey to hand for older buildings

Encourage occupiers to report water or draughts at frames. A quick report keeps a small repair small.

Failed mastic often goes unnoticed until heavy rain finds it. Resealing when cracking first shows avoids water damage and the complaints that come with it.

Accreditations

Trusted. Accredited. Insured.