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

Construction and new-build mastic in Kingswood, Kent

Mastic packages for new-build and refurbishment projects in Kingswood and across Kent. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Missed perimeter joints on a new elevation
  • Sealant knocked or painted over by other trades
  • External joints sealed in damp or cold conditions that are now failing
1
Send details
Drawings, photos, a joint schedule or a site visit.
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
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS & Constructionline
£5m PL insurance

Construction mastic near Kingswood

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

How we handle construction mastic in Kingswood

Perimeter sealing outside needs a dry joint and the right temperature. Cold or damp mornings, frost and condensation on frames can all hold external sealing up. Internal sealing often fills those days. If you have different trades sealing to different standards and frame gaps too wide for sealant alone, we can put it right, on cladding and panel joints, window and door perimeters and brick and block movement joints alike. Whether you call it commercial sealant work, mastic application or joint sealing, in Kingswood it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.

Around smaller places like Kingswood, building work usually means conversions of farm buildings, a few new houses or an extension to a hall or school. Each still needs a proper mastic package: window perimeters, facade joints and internal sealant to the specification.

We sign every job off with a 12-month guarantee. It’s a plain promise: if our work fails within that year, we put it right.

The Mastic Doctor team beside their liveried vans in front of an office building
Where
Kingswood (ME17)
Wider area
Kent
Guarantee
12 months on our workmanship
Price
A fixed quote before we start
Telephone
01277 525 020
Last updated
3 November 2026

Why deal with it now?

On a refurbishment, there’s a choice between resealing existing frames and replacing them. If the frame is in good order, cutting out and resealing the perimeter can be all it needs and that’s a far smaller job. If the frame is life-expired, we will tell you. For buildings around smaller places like Kingswood, water damage can go unnoticed for longer, especially where a building isn’t used daily, which gives a failed joint time to do damage. Renewing joints in good time avoids the problem.

Pricing mastic packages depends on how many there are, their condition and the access. Ask us for a fixed quote.

What you get with us

  • Old sealant cut out, never sealed over
  • Colour agreed before work starts
  • A Constructionline member, so easy to vet
  • RAL and finish matching where the product range allows

Take a look at our cost guide and how we’re accredited.

Work for main contractors and building owners

Hospitality, education, healthcare, office and retail clients book us directly too. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.

Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Kingswood can form part of a wider programme.

When to call us in Kingswood

Value-engineered products sometimes end up in the wrong joints. A sealant that isn’t right for the substrate or the movement will fail ahead of time. We use what’s specified, and any substitute goes to you for acceptance.

Any of the following is a good reason to get the joints checked over:

  • Old sealant on a refurbishment that needs stripping before new work
  • Window and door perimeters that won’t pass inspection
  • Mastic snags holding up handover
  • New external sealant already peeling away

School extensions, at buildings such as Kingswood Primary School, normally run to the summer holidays, mastic included.

Before you book anyone

  • Who will actually carry out the work
  • Do they follow the manufacturer’s priming guidance?
  • How long is the guarantee, and what does it include?
  • Which product they’ll use, and why it suits the joint

How to choose a sealant contractor

When to bring in a specialist

For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.

Some joints are best left to specialists: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong typically costs more in the end than doing them right.

Looking after the joints

Your facilities or cleaning team can help the joints last. Pass these on to them:

  • Keep product details for future maintenance
  • Check frame gaps are within the sealant’s range before sealing
  • Ask cleaners to use soft cloths around fresh sealant
  • Share drawings and the specification as soon as possible

Brief the sparkle clean so they don’t scrape the new joints. Scrapers used on frames and worktops can nick or lift a new bead so keep them off the joints.

A missed perimeter seal on one window can wet the reveal and the plaster inside. That usually means redoing finishes in a completed area and possibly a delayed handover. A check of every frame before decorators start is worth the time.

How a job runs

We schedule the visit to fit the site hours and access windows you give us. While we are working, the area stays contained and tidy, and your contact hears from us before we move to the next area. For work around Kingswood, we aim to finish in one visit, so we ask for photos and rough sizes first. Then the right materials arrive with us.

  1. We start with the drawings, specification and programme.
  2. We take off quantities and return a fixed quote.
  3. The sequence is agreed with the site manager.
  4. Each area is sealed when it’s released.
  5. Joints are prepared, backed and sealed to the specification.
  6. Snags are cleared and the package signed off with our 12-month guarantee.

Getting the site ready

  • Let us know about inductions and permits
  • Let building users know which areas are affected
  • Tell us which areas need to stay in use

Quotes

Need a figure for a tender or a budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. For a chat about it beforehand, call the office on 01277 525 020 or email a schedule or drawings.

Ask for a quote

Advice

Building and refurbishing in Kingswood

Kingswood sits in one of the drier corners of the country, the South East. Still, external mastic needs dry faces within the maker’s temperature limits, which isn’t every day, which is why external dates are agreed with the site manager. Kingswood is about 37 miles from central London. Commuter-belt towns tend to see a steady flow of new flats, offices and commercial schemes, so mastic packages have to keep pace with busy programmes.

Hospital estates such as KIMS hospital (5.2 miles north-west of Kingswood) tend to grow and change in phases, often next to occupied wards, so facade and perimeter sealing has to fit the estates team’s plan. On a campus such as Canterbury Christ Church University, 3.4 miles to the north-east of Kingswood, new teaching buildings and residences are normally built and refurbished around the academic year.

Kingswood is about 5 miles south-east of Maidstone, in Kent. If you’re looking for construction mastic in Kingswood, we can help. 931 places across Kent fall within our area, including Kingswood. There’s a separate page for London, roughly 37 miles from Kingswood.

Commercial sites across ME17 are covered. If your site is on Chestnut Drive, Bushy Grove and Tall Trees Close or close by, send details and we will quote for mastic packages. Sites close to Kingswood are covered too, including Chartway Street (1 mile south-west), Ulcombe (1 mile south-east), Broomfield (1 mile north), Fairbourne Heath (1 mile east) and Chegworth (1 mile north-east). A short drive away, we cover Maidstone (5 miles north-west), Ashford (12 miles south-east), Sittingbourne (9 miles north-east), Tonbridge (15 miles west), Faversham (13 miles north-east) and Minster (15 miles north-east).

Near you in Kingswood

For rail, the closest station is Harrietsham station, roughly 2.1 miles north-east of the centre. Nearby you will also find Leeds Castle (1.5 miles north) and KIMS hospital (5.2 miles north-west).

Map of Kingswood © OpenStreetMap contributors

FAQs: Kingswood

Will you plan work around the academic year at somewhere like Canterbury Christ Church University?

Yes. Education sites usually want the work in vacations or in phases during term, and we plan to suit. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.

Does your area include sites such as Roebuck Business Park, near Kingswood?

Yes, sites like Roebuck Business Park are within our area, along with the rest of Kingswood. To start, just call 01277 525 020 or send details through our quote form with the unit, the joints involved and your access times.

Do you take on multi-site work?

Yes. We take on portfolio and planned maintenance work, planned site by site to suit how each building is used.

Will you stick to the specified products?

The specified product is what goes in. If we think an alternative would suit better, we put it to you first.

Does the weather affect the work?

Outside, yes. Sealant needs a dry joint and a temperature within the product’s range, so frost, rain or cold mornings can delay outside work. Internal work is rarely affected.

Do you do fire-rated sealing on new builds?

Where it’s specified, yes. If the detail calls for collars, wraps or batts instead, we will tell you.

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.

Accreditations

Trusted. Accredited. Insured.