Greatness mastic sealing
Mastic sealing for building owners, managing agents and housing associations across Greatness, by CSCS-carded applicators. CHAS accredited and fully insured.
- Movement joints with sealant missing
- Repeated reactive repairs to the same buildings
- Damaged joints in communal entrances and corridors
Mastic sealing for Greatness sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
For managing agents and facilities managers
Hotels, schools, healthcare sites, offices and retail units book us directly too. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.
Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Greatness can form part of a wider programme across Kent.
Mastic sealing in Greatness, done properly
Owners and agents usually inherit a building’s mastic rather than choose it and it slowly wears out: it sits round windows and doors, along external joints and through communal areas. When it hardens, splits or pulls away, water and draughts follow along with complaints. We work on external wall and movement joints, communal kitchens and washrooms and balcony and threshold joints, and what we are called in for most is draughts at frames across a block and brittle perimeter mastic across a building. Whether you call it commercial sealant work, mastic application or joint sealing, in Greatness it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.
Older buildings and conversions around places like Greatness mix old masonry with newer frames. Perimeter joints need a sealant that suits both frame and masonry.
The 12-month guarantee is for workmanship rather than wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we spell out the cover before we begin.
- Place
- Greatness (TN13, TN14, TN15)
- Region
- Kent
- Cover
- 12 months on our workmanship
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Places near Greatness
What else we do in Greatness
After the work
To get the most from the new sealant:
- Make mastic part of routine maintenance checks
- Group repairs into a planned programme
- Mention RAMS, insurance or CSCS requirements up front
- Look at the sunniest and most exposed elevations first
Keep records of when each building was resealed. That makes future programmes easier to plan and gives you a history.
Leaks at window perimeters spoil finishes and can affect frames. Resealing early keeps the job small.
Planned mastic for Greatness portfolios
Greatness is about 19 miles from central London. Managed blocks of flats are a big part of commuter-belt property. Greatness 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 elevations facing the sun and the prevailing weather are usually where frame mastic ages first.
Schools and community buildings such as St John's Church of England Primary School need frame and external mastic kept sound like any building. If you are responsible for a building such as St John the Baptist, frame and door mastic needs the same attention as any other property.
Greatness is about 1 mile north-east of Sevenoaks, in Kent. Across the TN13 postcode area, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Greatness is one of 931 places we cover in Kent for mastic joints. Sites around London have their own page, about 19 miles away.
Work on mastic joints is covered throughout TN13, TN14 and TN15, for business premises of every kind. If your site is on Seal Road, Mill Lane and Sandy Lane or close by, we can quote for mastic joints. Nearby places we also cover include Seal (1 mile east), Godden Green (2 miles south-east), Styants Bottom (3 miles east), Bitchet Green (3 miles south-east) and Stone Street (3 miles south-east). Further afield, our area takes in Maidstone (14 miles east), Dartford (11 miles north), Royal Tunbridge Wells (11 miles south), Gravesend (12 miles north-east), Tonbridge (7 miles south-east) and Northfleet (12 miles north-east).
Near you in Greatness
Around Greatness, our work takes us to commercial buildings near The Old Bat and Ball pub, Wildernesse School and Knole Academy. There’s a railway station in Greatness itself: Bat & Ball station. Nearby you’ll also find Sevenoaks Museum (1.3 miles south) and Kemsing Castle Bank (1.7 miles north-east). Open spaces near Greatness include Dryhill Nature Reserve.
What happens if it’s left?
Piecemeal repairs over the years often leave mismatched sealant. Resealing a whole building gives a consistent finish. For buildings in places like Greatness, one well-planned visit beats several small ones, so it’s worth dealing with every failing joint at once.
There’s no price list, since every building and every scope is different. Call for a quote.
Why us?
- Work carried out by CSCS-carded applicators
- Commercial sealant work since 2005
- Matching to RAL references, product permitting
- Fixed quotes based on photographs, drawings or a visit
Take a look at how commercial sealant jobs are priced or our accreditations and insurance.
On site: what to expect
Diagnose, treat, sign off: that’s the shape of every visit. First comes an inspection and agreement on scope, then we prepare and seal each joint with the specified product, and we finish with a walk round so the work can be signed off. For a job in Greatness, the main thing is a clear picture of the work. A fixed quote follows.
- We check the asbestos register for older buildings and look at the joints.
- The products and programme are set out in a fixed quote.
- Failed mastic is removed completely.
- The joints are prepared and resealed with the right product.
- We finish each building before moving to the next.
What we need from you
- Tell us what induction or permit system the site runs
- Arrange parking or a loading space
- Agree which areas must stay open
Get a fixed quote
A handful of photographs and a postcode is the fastest way to a quote. Send them through the quote form, or speak to us on 01277 525 020 or email a schedule or drawings if you’d rather talk the job through.
Read more
What we’re called out for in Greatness
Much failed sealant was laid on dirty, dusty or damp surfaces. Without clean, sound faces and a primer where the product needs one, the bead peels off one side.
Common reasons buildings call us in:
- Cracked, hardened mastic round windows on a block
- Leaks at window and door perimeters
- Damaged joints in communal entrances and corridors
- Movement joints with sealant missing
Property owners at sites such as Bat & Ball Enterprise Centre, less than half a mile to the north-west of Greatness, can have mastic renewed between lettings.
Before you book anyone
- Will CSCS-carded applicators be on site?
- Whether primer will be used where the manufacturer specifies it
- How they handle RAMS and site documents
- Their pre-qualification and accreditations
When to bring in a specialist
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. That’s why many clients bring in a specialist from the beginning.
For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class.
Questions about Greatness
Does your area include sites such as Bat & Ball Enterprise Centre, near Greatness?
Yes. We cover Greatness and the area around it, including industrial estates, business parks and retail parks such as Bat & Ball Enterprise Centre. To start, just call the office on 01277 525 020 or send photos by email with the unit, the joints involved and your access times.
Will you take on a block within reach of Bat & Ball station?
Yes. Blocks of any size are within what we do. Send the address, photographs of the elevations and your access arrangements, and we will give a fixed quote.
Can you send RAMS and CSCS details before starting?
Let us know your requirements: tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote. We hold CHAS accreditation and Constructionline membership.
How long before the joints can be used?
That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, so we’ll confirm the curing time on the day.
Can you work to our specification?
Yes. The specification and the manufacturer’s installation guidance are what we work to, and any queries are raised before we start.
Does weather matter for sealant work?
It can, for external work. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so external work may be moved if conditions aren’t right. Internal work is far less affected.
Do you cover Greatness?
Yes. Sites across Greatness are covered.