Herne mastic sealing
Mastic sealing for building owners, managing agents and housing associations in Herne and across Kent. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- A mix of products and colours from past repairs
- Occupiers reporting cold air round windows
- Communal area joints that look neglected
Need mastic sealing in Herne?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Questions about Herne
Is Herne off your patch?
Not at all: smaller places are covered as well as towns. We cover Greater London and the counties of the South East. Where we can, we group nearby jobs to make the most of each trip.
Can being near the sea in Herne affect the sealant we need?
It can. Coastal exposure works external joints harder than inland weather. We choose the product for the exposure, prime where the manufacturer requires it and size the joint for its movement.
Will you quote for a small job?
Single areas, one-off repairs and whole buildings are all quoted the same way: send details, get a fixed quote, we seal, guaranteed.
Is mastic sealing guaranteed?
Our workmanship carries a 12-month guarantee and we hold public liability insurance.
Will residents or tenants be disturbed?
Residents and tenants carry on as normal. We flag any areas that need internal access well before the dates so it can be arranged.
How do I request a quote?
The quote form is the simplest route, though you can also ring 01277 525 020 or send photos by email. Photos, drawings or a joint schedule help us quote quickly.
Do you seal on top of existing sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.
How we handle mastic sealing in Herne
There isn’t one mastic for every joint on a building. Window perimeters and external joints often take a low-modulus neutral-cure silicone, while hybrid polymer sealants grip many materials and are often paintable. We will confirm the colours available for the specified product. We work on communal kitchens and washrooms, window and door perimeters on blocks and shopfronts below residential blocks, and what we are called in for most is open joints in brickwork or panels and the same joint failures repeated across a portfolio. Searching for sealant specialists in Herne? Mastic Doctor has worked for contractors, FMs and building owners since 2005, with CSCS-carded applicators.
Owners with buildings around smaller places like Herne often group mastic work so one visit covers several properties. One quote can cover a whole list of addresses.
We sign every job off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.
- Place
- Herne (CT6)
- Wider area
- Kent
- Cover
- A 12-month guarantee
- Price
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
On site: what to expect
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 we finish with a walk round so the work can be signed off. Work in places the size of Herne is planned as a single visit where we can. Photos with rough sizes let us arrive with everything needed.
- Each block or building is walked and the failed joints recorded with the likely cause.
- You get a fixed quote, priced per building where that helps your budgeting.
- The programme is fixed with you, including dates you can pass on to residents or tenants.
- We remove the old mastic completely and clean the joint faces back.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Finished joints are looked over and the 12-month guarantee confirmed.
Getting the site ready
- Tell us which areas need to stay in use
- Make sure the joints can be reached
- Confirm the product named in the specification
Get a fixed quote
Every quote starts with the facts: the joints involved, quantities, access and the product called for. Send what you have, and we’ll arrange a site visit if anything is unclear.
Advice
Other services in Herne
Site staff or a sealant specialist?
For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong typically costs more in the end than doing them right.
Looking after buildings in and around Herne
The sea is no more than about 2 miles from Herne. For owners and agents with buildings near the sea, exposed elevations are where frame mastic fails first, so it’s worth inspecting those sides more often. The 2 miles around Herne include seven care or nursing homes. Frame mastic on care buildings is best renewed elevation by elevation, with the manager deciding timings.
Schools and community buildings such as Herne Church of England Infant School need frame and external mastic kept sound like any building. Churches, halls and community buildings such as Church of St Martin are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time. Landlords with units on estates such as Eddington Business Park (to the north-west of Herne) can bring frame, door and external mastic across several units into one programme.
Herne is about 1 mile south of Herne Bay, in Kent. We cover commercial sites throughout Herne, whether it’s a single job or part of a planned programme. Across Kent, 931 places are covered, Herne among them. For work in that direction, see our London page (54 miles or so).
We cover the CT6 postcode districts. Buildings on St Martin's View, Ridley Close and Herne Street are within our area for mastic joints. Just outside Herne, we also work in Hunters Forstal (1 mile north-east), Eddington (1 mile north-west), Herne Common (1 mile south-west), Bullockstone (1 mile west) and Broomfield (1 mile north-east). Nearby towns on our patch include Canterbury (5 miles south-west), Margate (11 miles east), Ramsgate (12 miles east), Broadstairs (13 miles east), Whitstable (4 miles west) and Deal (15 miles south-east).
Around Herne
Locally, jobs take us to sites close to Curtis Wood and Herne Bay High School, among other places. Herne’s nearest station is Herne Bay station, roughly 1.2 miles north-west of the centre. A little further out are Whitstable and Tankerton Hospital (3.7 miles west) and Tankerton Castle (4.4 miles west). Green spaces nearby include West Blean and Thornden Woods.
What the job involves on each surface
External movement joints
External movement joints take up expansion and contraction. Failed sealant in a movement joint lets water in.
Estate-wide resealing programmes
An estate of similar buildings suits a rolling programme. Each block is priced and scheduled in order.
Maintenance after handover
Keep the joints in good shape with a few simple steps:
- Check sealant joints during planned building inspections
- Keep bins and bikes away from communal door frames
- Keep a record of when each building was resealed
- Look at the sunniest and most exposed elevations first
Ask residents or tenants to report draughts or leaks round windows early. A quick report keeps a small repair small.
Leaks at window perimeters spoil finishes and can affect frames. Resealing early keeps the job small.
When something else is needed
Our job is the joint, not everything around it. On its own, sealant can’t deal with:
- Leaks from above rather than through a joint
- Broken glass or failed sealed units
- Masonry that has broken away beside the joint
Not sure which it is? You can ring 01277 525 020 or send details through our quote form and we will tell you honestly.
Surfaces we seal
- External wall and movement joints
- Communal kitchens and washrooms
- Balcony and threshold joints
- Shopfronts below residential blocks
- Window and door perimeters on blocks
- Communal entrances and stairwells
What happens if it’s left?
A bead run over old mastic can look like a repair. It doesn’t bond and typically fails within a short time. Cutting out and resealing properly does it once. A failed joint lets water into a building whatever its size. Early resealing avoids the damage that follows a leak.
Every site prices differently: joint size, product, access and site hours all play a part. A fixed quote follows once we understand the job.
Why clients in Herne choose us
- Workmanship guaranteed for 12 months
- Sealing commercial buildings since 2005
- Products installed to the manufacturer’s instructions
- Our applicators hold CSCS cards
See how commercial sealant jobs are priced or how we’re accredited.