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

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

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

  • Cracked, hardened mastic round windows on a block
  • Movement joints with sealant missing
  • Mastic failing across several blocks on an estate
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed quote for the work, with the scope in writing.
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
CHAS accredited
£5m PL insurance

Mastic sealing near Woodlands

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

Mastic sealing in Woodlands, done properly

We work for building owners, landlords with commercial or block portfolios, managing agents and housing associations. A planned, building-by-building programme often works better than reacting to each complaint, with each block quoted and scheduled in turn. Site teams most often ask us about window mastic that has split and shrunk and draught complaints from residents or tenants, on communal entrances and stairwells, external wall and movement joints and balcony and threshold joints. Most enquiries from Woodlands start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.

Around smaller places like Woodlands, older walls fitted with newer windows are a familiar sight. Perimeter mastic there has to grip an uneven face and suit the building’s character.

Our 12-month guarantee is about workmanship, not wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we spell out the cover before we begin.

Place
Woodlands (TN15)
Region
Kent
Guarantee
A 12-month guarantee
Quote
A fixed quote before we start
Call
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Doing it in-house

Redoing a failed joint normally 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.

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.

Common questions from Woodlands clients

We manage a building near Kemsing station. Can you help?

Yes, and several blocks can go on one quote. We work to your notice and access arrangements.

Is West Kingsdown Industrial Estate, near Woodlands, within your area?

Yes. Estates, retail parks and business parks around Woodlands, West Kingsdown Industrial Estate among them, are all within reach. A few photos and the unit address let us price the work.

Will residents or tenants be disturbed?

The work is planned around occupiers. We agree the programme so you can notify occupiers and communal access is kept open.

Is mastic sealing guaranteed?

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

How long do sealant joints last?

There isn’t a single answer, 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.

How do you reach windows on upper floors?

Access is discussed and agreed before the quote is fixed. Tell us the number of storeys and whether scaffold or other access is planned, and we’ll tell you how we’d approach it.

Do you check for asbestos in old sealant?

Asbestos removal isn’t part of our work. If old sealant is suspected, work stops until it’s tested, and the duty to manage asbestos sits with the dutyholder.

Cost factors for mastic joints

Sealant work doesn’t have a standard rate, because every site is different. What we take into account:

  • Whether the work must be split into stages
  • The size and state of each joint
  • How much existing material needs removing
  • Site requirements such as inductions and permits

A quote for mastic joints depends on quantities, condition and access. Ask us for a fixed quote.

What we need to price the job

A few photos plus some basic facts will normally do. It helps to include:

  • Asbestos survey details if the building is older
  • A wide shot and a close-up of the area
  • The postcode of the building
  • Your programme or deadline

The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or speak to us on 01277 525 020 or send photos by email if you’d rather talk the job through.

How the job changes by surface

Window and door perimeters on blocks

Frames vary from uPVC to aluminium and timber, so the grade we pick has to bond to frame and wall alike. We will confirm the colours available for the specified product.

Communal areas

Communal entrances, stairwells and corridors have joints at door frames, screens, skirting and floor edges. Tidy, sound joints keep them looking cared for.

What sealant work can’t fix

A proper diagnosis includes knowing what sealant can’t do. You’ll hear from us if the cause turns out to be any of the following:

  • Roof leaks, gutters or failed flashings that aren’t sealant joints
  • Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
  • Cracked or crumbling render, brick or stone at the joint edges (we will tell you if so)

If in doubt, speak to us on 01277 525 020 or send details through our quote form and we’ll say what we think before you book.

Joints and surfaces we work on

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

Mastic sealing in Woodlands: the local picture

Woodlands sits in one of the drier corners of the country, the South East. Even so, frame mastic only goes on in dry, workable conditions, and the sunniest, most exposed sides of a building usually need attention first. Woodlands lies roughly 19 miles out from central London. Around the capital’s commuter belt, managing agents look after many blocks close to stations and town centres, and window and balcony mastic on them tends to age at the same rate.

If you look after a block within reach of Kemsing station, 1.8 miles to the south of Woodlands, frame and balcony mastic can be renewed on one programme. Older community buildings, Church of Saint Mary the Virgin among them, often have frames of mixed ages whose mastic varies.

Woodlands is about 4 miles north-east of Sevenoaks, in Kent. Woodlands sits inside our coverage, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Woodlands is one of 931 places we cover in Kent. Our London page has more on work in that area.

Postcode districts covered here: TN15. Close to Woodlands, our area also takes in Cotman's Ash (1 mile south-west), Knatts Valley (1 mile north), Romney Street (1 mile north-west), East Hill (1 mile north) and Heaverham (1 mile south). A short drive away, we cover Maidstone (13 miles east), Dartford (8 miles north), Sevenoaks (4 miles south-west), Royal Tunbridge Wells (13 miles south), Gravesend (9 miles north-east) and Tonbridge (9 miles south).

Local landmarks in Woodlands

We work on buildings around The Rising Sun pub and Kemsing Down and the streets around them. Woodlands’s nearest station is Kemsing station, roughly 1.8 miles south of the centre. Other landmarks nearby include Sevenoaks Hospital (3.3 miles south-west) and Kemsing Castle Bank (1.4 miles south-west).

Map of Woodlands © OpenStreetMap contributors

How a job runs

On arrival, we sign in, go through any site induction and check how permits are handled. Everything around the joints gets protected before anything is cut or cleaned, with the work itself normally taking one or more days per building, depending on the joint lengths and the access. For a building around Woodlands, tell us how to find it and who will meet us. Send that with the details and we will confirm the plan with the quote.

  1. We inspect each building and record the joints that have failed.
  2. The quote is fixed and split as suits you.
  3. Dates and areas are agreed so occupiers can be told.
  4. Old mastic is removed and the joint faces prepared.
  5. New sealant goes in with backing rod and primer where needed.
  6. Each building is checked and signed off with the 12-month guarantee.

Getting the site ready

  • Point out parking and an unloading spot
  • Tell staff and tenants when we will be in
  • Flag any permit to work we’ll need

Get a fixed quote

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

Get a price

Related advice

Common problems we fix in Woodlands

The edges of the material itself sometimes break away for instance where render or brick edges crumble. If the edges are unsound, we say so before quoting the sealing.

Look out for the following:

  • Water getting in round frames after rain
  • Complaints coming in block by block
  • Window mastic that has split and shrunk
  • Patchy repairs in mismatched sealant

For owners of several units at places like West Kingsdown Industrial Estate, 1.5 miles to the north-east of Woodlands, one programme can deal with frame and external mastic across the lot.

Comparing quotes

  • Their public liability cover
  • How long is the guarantee, and what does it include?
  • Their pre-qualification and accreditations
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?

Our contractor checklist

Accreditations

Trusted. Accredited. Insured.