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

Mastic sealing for building owners and managing agents in Hernhill, Kent

Mastic sealing for building owners, managing agents and housing associations throughout Hernhill and nearby, by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Cracked, hardened mastic round windows on a block
  • Occupiers reporting cold air round windows
  • Patchy repairs in mismatched sealant
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Need mastic sealing in Hernhill?

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

How we handle mastic sealing in Hernhill

We work for building owners, landlords with commercial or block portfolios, managing agents and housing associations. A planned, building-by-building programme often works better than reacting to each complaint, with each block quoted and scheduled in turn. We work on shopfronts below residential blocks, balcony and threshold joints and external wall and movement joints, and the usual reasons a site gets in touch are repeated reactive repairs to the same buildings and damp patches beside frames. Facilities teams, main contractors and managing agents in Hernhill tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

For buildings around smaller places like Hernhill, we group work so one trip covers it. Photos of each elevation help us quote accurately.

A 12-month guarantee applies to all our work. Should something we installed fail, phone 01277 525 020 or email us and we will come back to it.

Mastic Doctor team members lined up next to their branded vans outside an office building
Where
Hernhill (ME13)
Region
Kent
Cover
12 months on our workmanship
Quote
A fixed quote before we start
Call
01277 525 020
Last updated
3 November 2026

What sets the cost

Sealant work doesn’t have a standard rate, because every site is different. What we take into account:

  • The total length or number of joints
  • How accessible the joints are
  • Removal of failed or old sealant
  • Joint width, depth and condition

Larger quantities, tricky access or phasing all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.

Sending details for a quote

However big the job, the same details help:

  • Clear photographs of the problem areas
  • Any specification or named product
  • Drawings or a marked-up plan, if available
  • Whether the building will be occupied during the work

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. For smaller jobs, photos and a description will do.

Mastic sealing around Hernhill: points for this area

Hernhill is within about 3 miles of the coast. On buildings near the shore, the side facing the weather typically needs its mastic renewed first, and they deserve more regular inspection. Hernhill sits in one of the drier corners of the country, the South East. Outside mastic still needs a dry joint and the right temperature, and elevations facing the sun and the prevailing weather are normally where frame mastic ages first.

For a school such as Hernhill Church of England Primary School, perimeter mastic on windows and doors is a holiday job. Student accommodation around universities such as University of Kent (4.4 miles east of Hernhill) is usually managed block by block, which suits a planned mastic programme.

Hernhill is about 3 miles east of Faversham, in Kent. If you are looking for mastic sealing in Hernhill, we can help, as we do across Kent. We work across 931 places in Kent, from busy centres to rural villages. Sites around London have their own page, roughly 47 miles from Hernhill.

If you need mastic sealing in ME13, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Nearby places we also cover include Slutshole (1 mile south-west), Staplestreet (1 mile south-west), Dargate (1 mile north-east), Culmers (1 mile north-west) and Goodnestone (1 mile north-west). Bigger towns within reach include Ashford (12 miles south), Canterbury (6 miles east), Sittingbourne (10 miles west), Whitstable (4 miles north-east), Faversham (3 miles west) and Herne Bay (8 miles north-east).

Near you in Hernhill

In Hernhill, that means premises near Red Lion pub and Mount Ephraim Gardens and the streets around them. For rail, the closest station is Selling station, about 2.3 miles south-west. Other landmarks nearby include Chilham Castle (4.5 miles south) and Whitstable and Tankerton Hospital (5.3 miles north-east). Not far away are Blean Woods RSPB Reserve.

Map of Hernhill © OpenStreetMap contributors

Should maintenance staff do it?

Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

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. A poor seal in places like these tends to cost more to put right later.

Looking after the joints

To get the most from the new sealant:

  • Protect low-level joints in entrances
  • Ask residents or tenants to report leaks and draughts early
  • Group repairs into a planned programme
  • Share the asbestos register when you send details

If paintable sealant was used, decoration can follow once it has cured. Silicone usually can’t be painted, so keep decorators off it.

Mastic fails gradually, then all at once in a wet spell. Acting at the first signs keeps it a straightforward reseal and the complaints that come with it.

What sealant work can’t fix

Not every problem is a sealant problem, and we’d rather tell you before you spend money. These need a different solution:

  • Asbestos-containing sealant, which we don’t remove
  • Water coming in from the roof or rainwater goods
  • Substrate edges that need repairing first

Not sure which it is? You can ring 01277 525 020 or send details through our quote form and we’ll tell you honestly before you book.

What we seal

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

Common problems we fix in Hernhill

Topping up old mastic is a common shortcut. New sealant won’t grip failed sealant and the repair soon fails.

These are often picked up first by site or facilities staff:

  • Communal area joints that look neglected
  • Draughts at frames across a block
  • No planned programme for sealant
  • Leaks at window and door perimeters

Property owners at sites such as Waterham Business Park (to the north-east of Hernhill) can have mastic renewed between lettings.

Before you book anyone

  • How they’ll work around occupants
  • Their public liability cover
  • What site paperwork they can supply
  • Will failed sealant be removed rather than covered?

How to choose a sealant contractor

How a job runs

We begin with a short walk round with whoever looks after the building, agreeing which joints are in scope, where to start and what must stay open. Then we strip out anything that has failed, prepare every joint and seal it. Jobs in and around smaller places like Hernhill are normally planned as a single visit, so photos and measurements up front really help. That way the right products come on the day.

  1. A building-by-building inspection lists the failed joints.
  2. You get a fixed quote, per block or for the whole programme.
  3. We agree the programme and dates with you.
  4. Failed sealant is removed and the faces prepared.
  5. Joints are resealed and tooled.
  6. We check the finished work and confirm the guarantee.

Getting the site ready

  • Share the asbestos register for older buildings
  • Let building users know which areas are affected
  • Tell us which areas need to stay in use

Getting a fixed quote

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, ring 01277 525 020 or send photos by email.

Ask for a quote

Related advice

FAQs: Hernhill

Does a coastal location like Hernhill affect which sealant is used?

It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. Product choice and preparation matter more, and sea-facing elevations are worth inspecting more often.

Do you cover business parks and estates near Hernhill, such as Waterham Business Park?

Yes, sites like Waterham Business Park are within our area, along with the rest of Hernhill. A few photographs and the unit address let us price the work.

Do you work in Hernhill?

Yes. Sites across Hernhill are covered.

When can the area be used after sealing?

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

Which sealant will you use?

The specification comes first, if there is one. Without one, the joint decides: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.

Can you take on resealing for a block portfolio?

Yes, that’s exactly who this service is for. We work through buildings in a planned order with dates agreed in advance.

Do you need to see the site first?

Many jobs can be quoted from photos, drawings or a joint schedule. Where they aren’t, we arrange a site visit before quoting.

Accreditations

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