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

Mastic sealant contractors in Canterbury

Sealant work in Canterbury for main contractors, managing agents and facilities managers: mastic sealing for building owners, managing agents and housing associations, quoted at a fixed price.

  • Occupiers reporting cold air round windows
  • Open joints in brickwork or panels
  • Damp patches beside frames
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
12-month guarantee on our workmanship.
Covering the South East & Scotland
Constructionline member
£5m PL insurance

Mastic sealing near Canterbury

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

Our process

In a busy building, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed, then reopened once the sealant allows before we move to the next. Sites in a big town such as Canterbury frequently have reception sign-in, inductions and permits to work. Tell us about inductions, permits and site hours so the plan fits.

  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. The joints are prepared and resealed with the right product.
  5. Buildings are completed in turn.

Before we start on site

  • Share the asbestos register for older buildings
  • Explain the parking and delivery arrangements
  • Warn occupants and staff about the work

Getting a fixed quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photographs and a few notes.

Ask for a quote

Read more

How we handle mastic sealing in Canterbury

Blocks are lived in, so access and disruption have to be thought through. The sequence, the areas and the dates are settled with you, giving you what you need to notify residents. Entrances and stairwells are kept in use while we work. We work on shopfronts below residential blocks, communal kitchens and washrooms and balcony and threshold joints, and what we’re called in for most is worn sealant at communal door frames and brittle perimeter mastic across a building. A specialist sealant contractor works differently from a general builder: in Canterbury, that means joint design, primers and backing rod as standard.

Owners with several buildings in and around Canterbury often find window and door mastic failing on all of them at a similar age. One contractor, one programme and one fixed quote can cover the lot.

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’re clear about what is covered before work starts.

Location
Canterbury (CT1, CT2, CT4, CT3)
Wider area
Kent
Guarantee
12 months on every job
Quote
Quoted before any work starts
Phone
01277 525 020
Page updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Why act early in Canterbury

Resealing ahead of leaks keeps it to a maintenance task. After water has got in, there may be damp, damaged plaster or decoration to put right too, and the complaints come with it. In a town the size of Canterbury, traffic, footfall and weather keep working on a failed joint. Catching it early keeps the fix simple.

Access can matter as much as the joints themselves: easy-to-reach joints are quicker than those that need equipment to get to. Mention the access as part of your enquiry.

Why choose Mastic Doctor in Canterbury

  • Fixed quotes based on photographs, drawings or a visit
  • Constructionline member
  • Colour options checked against the specified product
  • Sealing commercial buildings since 2005

See what affects the cost or how we’re accredited.

For managing agents and facilities managers

Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. Programme, specification and site rules come first, and our applicators hold CSCS cards.

Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.

Questions about Canterbury

Will you take on work at estates like Wincheap Industrial Estate, close to Canterbury?

Yes. Estates, retail parks and business parks around Canterbury, Wincheap Industrial Estate among them, are all within reach. To start, just call 01277 525 020 or email a schedule or drawings with the unit, the joints involved and your access times.

Can you work in a care home near Canterbury with residents in?

Yes. We work around residents’ routines, a room or two at a time. Any site rules, from signing in to infection control, are agreed before we start.

Is any job too small?

Whatever the size, the process is the same: send details, get a fixed quote, we seal, guaranteed.

How long before the joints can be used?

That comes down to the sealant and the temperature. Some products skin over quickly but need longer to cure fully, so we’ll confirm the curing time on the day.

Do you work with property factors and landlords?

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

How long does a typical visit take?

The duration is planned around your programme and the access we’re given. We’ll give you an estimate of time on site when we quote.

Do you check for asbestos in old sealant?

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.

What the job involves on each surface

Estate-wide resealing programmes

An estate of similar buildings suits a rolling programme. We quote building by building and work through them in turn.

Communal areas

Entrance doors, screens and corridor junctions in communal areas all have sealant joints. Fresh joints make shared areas look looked after.

What sealant work can’t fix

Some faults sit outside our scope, and we say so rather than covering them up:

  • Misted or failed double-glazed units
  • Leaks through the frame itself rather than the perimeter
  • Cracked or crumbling render, brick or stone at the joint edges (we’ll tell you if so)

If you are not sure, just give us a call on 01277 525 020 or send photos by email and we’ll give you a straight answer.

Where we work in Canterbury

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

Block-wide mastic in Canterbury

Canterbury is about 53 miles from central London. Managed blocks of flats are a big part of commuter-belt property. Canterbury sits in one of the drier corners of the country, the South East. External mastic still waits for dry faces and the right temperature, and the sunniest, most exposed sides of a building usually need attention first.

For agents with blocks near Canterbury East station, less than half a mile south-west of Canterbury, a block-wide mastic programme deals with frames, balconies and entrances in one go. Landlords with units on estates such as Wincheap Industrial Estate, 0.7 miles to the south-west of Canterbury, can bring frame, door and external mastic across several units into one programme. Owners of student blocks near University of the Creative Arts, less than half a mile south-east of Canterbury, can schedule frame and external mastic for the summer vacation.

Canterbury is in Kent. Businesses, contractors and managing agents in Canterbury use us for work on mastic joints. Canterbury is one of 931 places in Kent on our list. For work in that direction, see our London page.

Business premises anywhere in CT1, CT2, CT4 and CT3 are within our area. If your site is on Long Market, High Street and High Street St Gregorys or close by, send details and we’ll quote for mastic joints. You will find Canterbury on or near the A2 and A28. Nearby places we also cover include Wincheap (1 mile south-west), Harbledown (1 mile west), Hales Place (1 mile north), Thanington (1 mile south-west) and Stuppington (1 mile south) for mastic joints. Bigger towns within reach include Ashford (13 miles south-west), Margate (15 miles north-east), Dover (14 miles south-east), Folkestone (14 miles south), Ramsgate (15 miles east) and Whitstable (6 miles north-west). Canterbury is one of the busier places in Kent, and we take on mastic joints for its commercial and public buildings.

Landmarks near Canterbury

Around Canterbury, our work takes us to commercial buildings near Canterbury School of Architecture, Bus Company Island and St Thomas of Canterbury Church. You’ll also find The Old Buttermarket pub (less than half a mile south-west) and Barton Court Grammar School (0.5 miles east). Canterbury has its own railway station: Canterbury East station. Other landmarks nearby include Whitefriars Shopping Centre (under half a mile south-west) and Canterbury Roman Museum (less than half a mile south). Not far away are Blean Woods RSPB Reserve.

Map of Canterbury © OpenStreetMap contributors

What affects the price in Canterbury

Before we quote, we look at:

  • How much existing material needs removing
  • How much there is to seal
  • Joint width, depth and condition
  • The site’s rules and procedures

Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote.

Details that help us quote

A good diagnosis starts with the right details. Let us know:

  • The site address and postcode
  • The asbestos register, for older buildings
  • Specification clauses that apply
  • A wide shot and a close-up of the area

A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.

Accreditations

Trusted. Accredited. Insured.