Kent · England
Three Chimneys External Mastic
Problem with your movement joints in Three Chimneys? We cut out the old, prepare the joints and apply the right sealant.
- Failed seals between different materials
- Water getting into walls through failed joints
- Joints with sealant missing in places
External mastic in Three Chimneys
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we’ll confirm what access is needed. We work on façade panels, render & cladding joints and joints between brick and frames, and people most often call us about water getting into walls through failed joints and sealant pulling away from one side of the joint.
In a village or hamlet like Three Chimneys, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Your job is guaranteed for a year, as with all our work.
- Where
- Three Chimneys (TN27)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
FAQs for Three Chimneys
Can you help a landlord with a rental near Headcorn station?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Will you come out to Three Chimneys?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Will the old sealant be removed?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Three Chimneys and the rest of Kent.
Should I point up the gap in my brickwork?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Is there any odour?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Are you an approved applicator?
Yes. We are an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
What the job involves on each surface
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and protects the render itself.
Cladding and façade panels
Cladding and façade panels are generally separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.
Nearby places to Three Chimneys
More services for Three Chimneys
Why deal with it now?
Sealing over the top of old mastic doesn’t hold for long. The new layer cannot bond properly to old, weathered material, so the old joint is cut out fully first. Older cottages and farmhouses around Three Chimneys can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Why choose Mr Mastic in Three Chimneys
- We agree the colour with you first
- 180+ five-star Google reviews
- ARBOMaster approved applicator
- Tidy, careful work
Take a look at our cost guide or our reviews.
How the visit works
You don’t need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the work takes a few hours for a handful of joints, longer for a whole elevation in most cases. Somewhere as small as Three Chimneys, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- On commercial sites, let us know about site rules
- Where the joints are inside, avoid wetting them before we arrive
- Plan for the work area to be out of bounds to pets and children
Get a quote
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job, and we’ll come back to you with a quote.
Advice
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- How many rooms, windows or areas are involved
- The old material and how stubborn it is
- Access and height
- Whether there’s mould to deal with
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
What to tell us for a quote
When you call or email, it’s useful to know:
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
- Any previous sealing or DIY work
- A few photos by email, if you can
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
External mastic in Three Chimneys: local notes
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Headcorn station? Then split movement joints are easy to miss on a rental until damp shows inside. In and around Three Chimneys, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Three Chimneys is about 11 miles south of Maidstone, in Kent. Homes, rented property, offices and hotels in Three Chimneys can book us for external mastic. Every job comes with our 12-month guarantee. 922 places in Kent are on our list, from the larger towns to small villages. Our Crawley page covers work nearby.
Work in TN27 is quoted and booked the same way as anywhere else. That includes homes and businesses on Hareplain Road and Sissinghurst Road. We also cover the places around Three Chimneys: Hareplain (1 mile north-east), Biddenden (1 mile east), Curteis' Corner (2 miles east), Standen (2 miles north-east) and Lashenden (2 miles north-east). Further out, we also cover Maidstone (11 miles north), Ashford (11 miles east), Royal Tunbridge Wells (15 miles west), Tonbridge (15 miles west), Kings Hill (14 miles north-west) and Foley Park (12 miles north).
Local landmarks in Three Chimneys
We work in homes and buildings around Three Chimneys Public House, among other places. The closest station to Three Chimneys is Headcorn station, roughly 3.2 miles north. Other landmarks nearby include Kent Firefighting Museum (1.2 miles north) and Sissinghurst Castle (1.3 miles west).
Can I do it myself?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Landlord and commercial work in Three Chimneys
Letting agents and landlords in Three Chimneys can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
What sealant work can’t fix
Before you book, it’s worth knowing the limits:
- Render that’s blown, hollow or coming away
- Cracked brickwork or render that needs a builder or plasterer
- Damp that is not coming from the joint
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly before you book.
What we seal
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Copings & trims