Kent · England
External & façade joints in Harbledown, Kent
Problem with your movement joints in Harbledown? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Cracked joints where brick meets render or frames
- Water getting into walls through failed joints
- Hard, crazed mastic that has stopped moving
External mastic for homes and businesses in Harbledown
A movement joint is a deliberate break that lets a wall expand and contract. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. Common call-outs are for water getting into walls through failed joints and plants rooting in failed movement joints, across joints between brick and frames, concrete & block and façade panels.
In a village or hamlet like Harbledown, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
Big or small, you get the same 12-month guarantee.
- Place
- Harbledown (CT2)
- Wider area
- Kent
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What external mastic looks like in Harbledown
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you let a flat or house near Canterbury West station, split movement joints are easy to miss on a rental until damp shows inside. Managing a site like The Canterbury Primary School? Then larger buildings have long runs of movement joint that eventually need resealing. If you live in an older home near St Michael and All Angels Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Harbledown is about 1 mile west of Canterbury, in Kent. Whether you are in the middle of Harbledown or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. We cover 922 towns and villages across Kent, from the larger towns to small villages. We also work in Chelmsford, about 40 miles from Harbledown.
Jobs for external mastic in CT2 works the same way as everywhere else we cover. Whether your property is on Lanfranc Gardens, Mill Lane and Church Hill or a nearby road, we can help. We also cover the places around Harbledown: Rough Common (1 mile north-west), Wincheap (1 mile south-east), Thanington (1 mile south), Upper Harbledown (1 mile west) and Canterbury (1 mile east). We also work in nearby towns such as Ashford (13 miles south-west), Dover (14 miles south-east), Sittingbourne (15 miles west), Folkestone (14 miles south), Whitstable (5 miles north) and Deal (15 miles east).
Landmarks near Harbledown
We work in homes and buildings around Whitehall Meadows, St Edmund's School and The Monument Inn and the streets around them. Nearby too are St Thomas of Canterbury Church (1.2 miles east) and The Canterbury Academy (within half a mile south-east). For rail, the closest station is Canterbury West station, about 0.8 miles east. Other landmarks nearby include Eastbridge Hospital of St Thomas the Martyr (0.9 miles east) and Sidney Cooper Museum (0.9 miles east). Green spaces nearby include Blean Woods RSPB Reserve.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
For landlords and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured for the work.
The process
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to several days, depending on the building. In a small place like Harbledown, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Getting ready for the visit
- Clear items away from the joints we’re working on
- Let us know about earlier repairs to the joints
- Let us know if you’ve seen damp or leaks
Getting a quote
To get a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before we start.
Advice
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Why it’s worth doing now in Harbledown
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. In a small place like Harbledown, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Why us?
- More than 20 years in sealant work
- An ARBOMaster approved applicator
- 180+ five-star Google reviews
- Sealant colour chosen to suit
See our cost guide or our reviews.
What affects the quote in Harbledown
Call for a quick quote. What matters most is:
- Mould in or behind the old joints
- The size of the job
- Which sealant suits the joint
- How many rooms, windows or areas are involved
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we’ll explain the quote if you ask.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- The problem you’ve noticed
- Photos by email, if that’s easy
- Where the job is, and your postcode
- Whether it’s a home or a business
Need a quote? Please call 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Common questions in Harbledown
Will you come out to Harbledown?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Canterbury West station. Can you help?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Do you take out the old sealant first?
Yes, every time. New sealant won’t bond properly to old, so the joint is cleaned back first.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
Do I need to be at home?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Which products do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we will tell you what we are using.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher ones, send details and we will confirm the access.
How the job changes by surface
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. A primer goes on where the product requires one before the bead.
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Point out the joints to other trades
- Do not let climbing plants root in the sealant
- Have failed joints looked at early
- Keep movement joints as flexible joints, not mortar
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges and let water in behind.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established.