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

Chartham construction mastic

Mastic packages for new-build and refurbishment projects throughout Chartham and nearby, carried out by CSCS-carded applicators. CHAS accredited and fully insured.

  • Existing joints on a refurb that need cutting out and resealing
  • Early adhesion failures on new external joints
  • Different trades sealing to different standards
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
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Signed off, with 12 months’ guarantee.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Construction mastic in Chartham

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

Your questions answered

Can you work around term dates at a campus such as University of the Creative Arts?

Yes. Tell us the term dates, vacation periods and access windows, and we will plan the work around them. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

Is a smaller place like Chartham outside your area?

Not at all. Chartham is within our area. We work across Greater London and the South East. We plan jobs in smaller places so return trips are kept to a minimum.

Do you do internal caulk as well as external mastic?

It depends on the specification, but frames, sanitary, kitchens, caulk where specified and snagging are typical.

Can you work to our specification?

Yes. We follow the specification, along with the manufacturer’s installation guidance, and any queries are raised before we start.

Are you CHAS accredited?

Our applicators are CSCS-carded, and we hold CHAS accreditation and Constructionline membership. Tell us what site paperwork you need and we will confirm with the quote.

What will the job cost?

There isn’t a price list, as every site differs. Send photographs or drawings and we will price it at a fixed figure.

Can you work while the building is occupied?

Usually, yes. Phased work can be planned so areas stay in use.

Construction mastic in Chartham

Refurbishment work needs a slightly different approach from new build. Existing joints have to be stripped back to sound faces, because fresh sealant can’t key into cured silicone, and on older buildings we ask for the asbestos survey before disturbing anything. New and existing joints then get the same preparation. Most enquiries involve a mastic package split between trades with no clear owner and mastic snags holding up handover, on cladding and panel joints, sanitary and kitchen joints and floor and skirting junctions. Whoever orders the work in Chartham, the brief is usually the same: a clear scope, tidy work and joints that don’t fail again.

Construction in and around smaller places such as Chartham is often barn conversions, small groups of houses or extensions to halls and schools. Each still needs a proper mastic package: window perimeters, facade joints and internal sealant to the specification.

Guaranteed is the last step of every job. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.

Place
Chartham (CT4)
Wider area
Kent
Guarantee
12 months on every job
Quotes
Fixed quote, scope in writing
Call
01277 525 020
Page updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Honest limits

Before quoting, we check that sealant is the right answer. It won’t put right:

  • Joints damaged after sign-off by following trades
  • Defective windows, doors or glazing units (the supplier or installer’s job)
  • Oversized gaps that need packing or adjustment by others

Not sure which it is? You can phone 01277 525 020 or send photos by email and we’ll tell you honestly.

Joints and surfaces we work on

  • Internal decorators’ caulk
  • Window and door perimeters
  • Brick and block movement joints
  • Cladding and panel joints
  • Sanitary and kitchen joints
  • Floor and skirting junctions

Looking after the joints

A few simple habits keep the new joints working:

  • Bring the mastic contractor in after the last trades are through
  • Put any product change through the designer first
  • Keep scrapers and abrasive pads off new beads
  • Keep product details for future maintenance

Tell the builders’ clean team which areas have new sealant. Scrapers used on frames and worktops can nick or lift a new bead, so stick to soft cloths and gentle cleaners near sealant.

A missed perimeter seal on one window can wet the reveal and the plaster inside. That typically means redoing finishes in a completed area, and a delay to handover. Checking perimeters before internal finishes go on avoids it.

Mastic packages on Chartham sites

Chartham is in the South East, one of the UK’s drier regions. Winter mornings still bring frost and condensation on frames and panels, which is why external dates are agreed with the site manager. At about 51 miles from central London, Chartham is within reach of the capital. Towns within reach of London tend to keep building, from flats to offices and schools, and each scheme needs its mastic sealed to programme.

Projects at schools like Chartham Primary School work to term dates, so mastic is programmed tightly. Work at a hotel such as Howfield Manor Hotel (to the north-east of Chartham) tends to be programmed around bookings, mastic included. On a campus such as University of the Creative Arts, which lies north-east of Chartham, new teaching buildings and residences are usually built and refurbished around the academic year.

Chartham is about 3 miles south-west of Canterbury, in Kent. If you are looking for construction mastic in Chartham, we can help, as we do across Kent. Chartham is one of 931 places in Kent on our list. For work in that direction, see our London page.

Postcode districts covered here: CT4. Buildings on Station Road, River Court and The Green are within our area. Nearby places we also cover include Shalmsford Street (1 mile south), Mystole (1 mile south-west), Chartham Hatch (1 mile north), Garlinge Green (2 miles south) and Thanington (2 miles north-east) for mastic packages. Nearby towns on our patch include Ashford (10 miles south-west), Canterbury (3 miles north-east), Dover (15 miles south-east), Sittingbourne (14 miles north-west), Folkestone (14 miles south-east) and Whitstable (7 miles north).

Near you in Chartham

Recent enquiries here include premises near No Man's Orchard and The Artichoke Inn, among other places. Chartham has its own railway station: Chartham station. A little further out are Chilham Castle (2.7 miles west) and Whitefriars Shopping Centre (3.1 miles north-east). Not far away are Blean Woods RSPB Reserve.

Map of Chartham © OpenStreetMap contributors

Surface by surface

Window and door perimeters

Inside, a paintable sealant or decorators’ caulk is used where the joint doesn’t move much. We follow what’s specified, and colour-matched products can be used where the frame is on show.

Kitchens and utility areas

Worktop upstands, sinks and splashbacks are sealed once the kitchen is fitted. The sealant is a kitchen-grade product.

For managing agents and facilities managers

Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we’ll confirm with the quote.

We work for building owners and managing agents on sealant work across single buildings or whole portfolios around Chartham. One quote can cover more than one site, so there’s one set of paperwork to deal with.

Diagnose, treat, sign off

We bring the products specified for the job, along with primers and backing rod. Joint faces are cleaned back to sound, dry surfaces, the manufacturer’s primer is applied where it’s called for, and each bead is tooled to a neat concave finish. Smaller jobs around Chartham can be grouped with others nearby. A fixed quote is given before anything starts.

  1. First we look at the scope on site or from drawings.
  2. You receive a fixed quote covering scope, products and sequence.
  3. Site paperwork is confirmed and our CSCS-carded applicators are inducted.
  4. Sealing follows the programme as areas are released.
  5. Problems we find, such as oversized gaps, are raised right away.
  6. The package is closed out, snags cleared and backed by our 12-month guarantee.

Preparing the site

  • Arrange parking or a loading space
  • Point out any areas we must not close
  • Share your working hours and any access restrictions

Get a fixed quote

Let us know the site, the scope and your timescale, and we will put a fixed quote together. The easiest way is to call 01277 525 020 or email us.

Get a price

Read more

Why deal with it now?

Clearing snags piecemeal is tempting when handover is close. But one planned snagging pass through each area usually clears more for less disruption and saves applicators coming back again and again. Snagging can be priced as a separate stage. One visit to deal with every failing joint makes more sense than several trips to a place like Chartham, rather than one at a time. Send photographs of each area and we’ll quote for the lot.

Access can matter as much as the joints themselves: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.

Why appoint us

  • Public liability insurance in place
  • Coloured sealants to suit the setting, where available
  • Commercial sealant work since 2005
  • Constructionline member for supplier checks

Read how commercial sealant jobs are priced or our accreditations.

Accreditations

Trusted. Accredited. Insured.