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

Construction Mastic in Hersden

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

  • Window and door perimeters that won’t pass inspection
  • A mastic package split between trades with no clear owner
  • Internal caulk splitting as the building dries out
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
CHAS accredited
£5m PL insurance

Construction mastic in Hersden

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

FAQs: Hersden

Do you cover business parks and estates near Hersden, such as Canterbury Industrial Park?

Yes, sites like Canterbury Industrial Park are within our area, along with the rest of Hersden. Send details of the unit and the work through our quote form for a quick quote.

Can you work on a hospital site such as St Martins Hospital?

Yes, provided the work is planned with the site’s estates team. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.

What site paperwork can you supply?

Let us know which documents the site needs, such as RAMS, an insurance certificate or CSCS details, and we will confirm them with the quote.

How soon can the area be used again?

The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.

Are you fully insured?

Yes. We’re fully insured, including public liability cover.

Can weather delay the job?

It can, when the joints are outside. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so external work may be moved if conditions aren’t right. Indoors, the weather is rarely a problem.

Is it fine to apply new sealant on top of old?

No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.

About our construction mastic in Hersden

On a new build, the mastic package is one of the last trades through each area, so it lands at exactly the point the programme is tightest. We work as a mastic subcontractor to main contractors and developers with projects in Hersden, following the trades through the building as rooms and elevations become ready. Most enquiries involve a long mastic snag list close to completion and different trades sealing to different standards, on sanitary and kitchen joints, cladding and panel joints and window and door perimeters. A single leaking joint is often how a building in Hersden first comes to us: we look at the rest while we are there and tell you what we find.

Building work in places the size of Hersden is normally small-scale: a handful of new houses, barn conversions, a school or hall extension. Even a small site needs its perimeter and facade joints sized, backed and sealed properly.

Every job ends the same way: guaranteed. Our workmanship is backed for 12 months, and the quote explains what it covers.

The Mastic Doctor team beside their liveried vans in front of an office building
Where
Hersden (CT3)
Region
Kent
Guarantee
12 months on every job
Price
Fixed quote, scope in writing
Phone
01277 525 020
Updated
3 November 2026

Diagnose, treat, sign off

The first thing on site is a walk round with your contact, to confirm the scope, the order of work and any areas we must keep clear. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. Work in places the size of Hersden is planned as a single visit where we can. Photos with rough sizes let us arrive with everything needed.

  1. We start with the drawings, specification and programme.
  2. Quantities are measured and a fixed price returned.
  3. We agree with the site team which areas come first.
  4. Plots or floors are sealed as they’re handed over.
  5. Every joint is cleaned, set to depth and sealed with the specified product.
  6. Snags are cleared and the package signed off with our 12-month guarantee.

Before we start on site

  • Tell us your opening times and when work is allowed
  • Send asbestos survey details if the building is pre-2000
  • Point out parking and an unloading spot

Quotes

We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To start the process, speak to us on 01277 525 020 or email drawings and photos.

Get a quick quote

Read more

What we can’t put right

A few problems need another trade or a different fix, and we say so rather than covering them up:

  • Frames fitted out of tolerance
  • Joints damaged after sign-off by following trades
  • Approving fire stopping as compliant

Not sure which it is? You can call the office on 01277 525 020 or email drawings and photos and we’ll tell you honestly.

Where we work in Hersden

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

Construction mastic around Hersden: how the place shapes the job

The South East is one of the drier parts of the UK. Still, external mastic needs dry faces within the maker’s temperature limits, which isn’t every day, so external mastic is timed for workable conditions and agreed with the site manager. Hersden is about 56 miles from central London. Commuter-belt towns tend to see a steady flow of new flats, offices and commercial schemes, which keeps mastic packages in demand.

On a campus such as Canterbury Christ Church University (3.9 miles south-west of Hersden), new teaching buildings and residences are usually built and refurbished around the academic year. Units on estates such as Canterbury Industrial Park (0.6 miles east of Hersden) tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal. School extensions, at buildings such as Hersden Village Primary School, usually run to the summer holidays, mastic included.

Hersden is about 4 miles south of Herne Bay, in Kent. We send applicators to Hersden for mastic packages. We work across 931 places in Kent, from busy centres to rural villages. For work in that direction, see our London page, about 56 miles away.

We take on mastic packages across the CT3 postcode area, for business premises of every kind. Among the streets we cover are The Firs, The Sycamores and Chequer Tree Close. We also cover Westbere (1 mile south-west), Stodmarsh (1 mile south-east), Hoath (1 mile north), Knave's Ash (1 mile north) and Sturry (2 miles west) for mastic packages. Further afield, our area takes in Canterbury (4 miles south-west), Margate (11 miles north-east), Dover (14 miles south-east), Ramsgate (11 miles east), Broadstairs (12 miles east) and Whitstable (6 miles north-west).

What’s near Hersden

Locally, jobs take us to sites close to Frank Montgomery School, Spires Academy and Ye Olde Yew Tree Inn and the streets around them. Hersden’s nearest station is Sturry station, about 1.9 miles south-west of the centre. Other landmarks nearby include Canterbury Castle (4.5 miles south-west) and St Martins Hospital (3.4 miles south-west). Not far away are West Blean and Thornden Woods.

Map of Hersden © OpenStreetMap contributors

Keeping the joints sound

Regular inspection catches problems early. Specifically:

  • Note which sealant went where at handover
  • Ask for joint and product checks before the package is urgent
  • Brief the final clean team to avoid blades near sealant
  • Bring the mastic contractor in after the last trades are through

Any damage after we have finished should go on the snag list straight away. We can return to clear snags before handover.

Sanitary joints that fail early become defects soon after occupation. Water gets behind trays, vanity tops and panels, and the repair falls into the defects period. Proper preparation, with the right silicone first time, keeps it off the defects list.

Leave it or put it right?

Leaving mastic to whichever trade is fitting the element can look cheaper on paper. In practice it often means different standards, gaps in responsibility and snags nobody owns. One mastic subcontractor for the lot keeps it simple. In a smaller place such as Hersden, getting a contractor back for a second visit takes time, so it’s worth dealing with every failing joint at once.

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.

Why appoint us

  • RAL and finish matching where the product range allows
  • Work carried out by CSCS-carded applicators
  • CHAS accredited contractor
  • Colour agreed before work starts

Read what affects the cost and our accreditations.

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.

Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

Different surfaces, different methods

External facade and movement joints

External movement joints often need primer, depending on the substrate. We prime where the manufacturer specifies.

Snagging before handover

Snags usually come from damage by following trades, missed joints or poor earlier work. We price snagging as part of the package or as a separate visit.

Accreditations

Trusted. Accredited. Insured.