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

Stonehill Green mastic sealing

Need mastic sealing in Stonehill Green? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.

  • Damaged joints in communal entrances and corridors
  • Open joints in brickwork or panels
  • Draughts at frames across a block
1
Send details
Photos, drawings or a schedule, or we visit.
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
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
CHAS accredited
£5m PL insurance

Mastic sealing for businesses in Stonehill Green

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

Mastic sealing in Stonehill Green

Across Stonehill Green and the rest of Kent, we work the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Addresses, photographs of typical joints and a rough idea of quantities let us give a quick quote, and site visits can be arranged. Site teams most often ask us about damp patches beside frames and draughts at frames across a block, on communal entrances and stairwells, external wall and movement joints and communal kitchens and washrooms. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Stonehill Green, that means joint design, primers and backing rod as standard.

Owners and agents with buildings around smaller places such as Stonehill Green tend to manage small terraces of association properties, converted barns and commercial units. Mastic around frames and on external joints wears out in time, whatever the building.

Our 12-month guarantee is about workmanship, not wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we spell out the cover before we begin.

The Mastic Doctor team beside their liveried vans in front of an office building
Place
Stonehill Green (DA2)
Region
Kent
Guarantee
12 months on every job
Quotes
Fixed quote, scope in writing
Phone
01277 525 020
Updated
3 November 2026

How a job runs

Inspect, seal, sign off: every visit follows that pattern. 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. For a building around Stonehill Green, tell us how to find it and who will meet us. Send that with the details and we’ll confirm the plan with the quote.

  1. First comes a look at the joints and, for older buildings, the asbestos records.
  2. A fixed quote covers the joints, products and order of work.
  3. Failed mastic is removed completely.
  4. Joint faces are cleaned, backed and resealed.
  5. Buildings are completed in turn.

What we need from you

  • Point out any areas we must not close
  • Send your site hours and access windows
  • For older buildings, check the asbestos register before work

Getting a fixed quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to give us a call on 01277 525 020 or send details through our quote form with what you know.

Get a price

Advice

When it isn’t the sealant

Being straight saves everyone time. Fresh joints won’t solve:

  • Cracked or crumbling render, brick or stone at the joint edges (we’ll tell you if so)
  • Glazing that needs replacing
  • Frames that are rotten, warped or broken

If you are not sure, just call the office on 01277 525 020 or email us and we’ll give you a straight answer before you book.

Where we work in Stonehill Green

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

Different surfaces, different methods

Communal areas

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

Estate-wide resealing programmes

Using the same products throughout keeps the estate consistent and easier to manage.

What sets the cost

A fixed quote reflects the actual work. It allows for:

  • Working within restricted access windows
  • How accessible the joints are
  • Joint width, depth and condition
  • Distance, for remote addresses

We don’t publish prices, since every building and every scope is different. Call for a quote.

What we need to price the job

However big the job, these details speed things up:

  • The type of building and who uses it
  • Specification clauses that apply
  • Approximate linear metres or a joint schedule
  • Whether an asbestos survey exists

The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or call 01277 525 020 or email the details over to discuss it first.

FAQs: Stonehill Green

Will you take on a block within reach of Swanley station?

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

Can work in a care setting near Stonehill Green go ahead while residents are there?

Yes, with the manager deciding the order and timing of rooms. We follow the home’s own procedures throughout.

When can the area be used after sealing?

We’ll confirm how long the chosen product needs to cure, and sign any area that should be left alone.

Do you do block-wide mastic programmes?

Yes. Each building is inspected, quoted and scheduled in turn starting wherever is most urgent.

How long do sealant joints last?

There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.

What if the old mastic contains asbestos?

Asbestos removal isn’t part of our work. Anything suspect is tested before we carry on, and the duty to manage asbestos sits with the dutyholder.

Can weather delay the job?

It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Internal work is far less affected.

Should maintenance staff do it?

General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.

The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are where general trades tend to cut corners.

Block-wide mastic in Stonehill Green

Stonehill Green is in the South East, one of the UK’s drier regions. Outside work still depends on dry joints, and the sunniest, most exposed sides of a building usually need attention first. Stonehill Green has three care or nursing homes no more than 2 miles away. Frame mastic on care buildings is best renewed elevation by elevation, with the manager deciding timings.

For agents with blocks near Swanley station, 1.4 miles south of Stonehill Green, a block-wide mastic programme deals with frames, balconies and entrances in one go. For a school such as Hextable School, perimeter mastic on windows and doors is a holiday job. Older community buildings, St Peter among them, often have frames of mixed ages whose mastic varies.

Stonehill Green is about 3 miles south-east of Sidcup, in Kent. Commercial clients in Stonehill Green can call on us for mastic joints. Our Kent coverage takes in 931 places. There’s a separate page for London, roughly 13 miles from Stonehill Green.

Business premises anywhere in DA2 are within our area for mastic joints. Just outside Stonehill Green, we also work in Puddledock (1 mile north-east), Hextable (1 mile east), Joyden's Wood (1 mile north), Hockenden (1 mile south-west) and Upper Ruxley (1 mile west). A short drive away, we cover Dartford (3 miles north-east), Sevenoaks (9 miles south), Gravesend (9 miles east), Northfleet (8 miles east), Kings Hill (14 miles south-east) and Swanscombe (6 miles north-east).

Near you in Stonehill Green

Locally, jobs take us to sites close to The Ship pub, Hextable Primary School and Dartford Heath, among other places. Stonehill Green’s nearest station is Swanley station, about 1.4 miles south. Well-known places in the area include Queen Mary's Hospital (2.8 miles west) and Eynsford Castle (3.6 miles south-east). Not far away are Summer Hill and The Warren.

Map of Stonehill Green © OpenStreetMap contributors

Why deal with it now?

Adding sealant to cyclical maintenance is an easy win. Leaving it until there’s a leak turns it into reactive work and less choice about when. For buildings around smaller places like Stonehill Green, water damage can go unnoticed for longer, especially where a building isn’t used daily, so a failed joint can leak for a while before anyone sees it. Resealing early avoids that.

Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we will put a fixed figure on it.

Why choose Mastic Doctor in Stonehill Green

  • Matching to RAL references, product permitting
  • Constructionline member for supplier checks
  • One number for every site we cover
  • Sealing commercial buildings since 2005

Take a look at what affects the cost and our accreditations.

Accreditations

Trusted. Accredited. Insured.