Kent · England
External & façade joints in Cold Harbour, Kent
Movement joints in Cold Harbour need attention? We cut out the old, prepare the joints and apply the right sealant.
- Water getting into walls through failed joints
- Panel joints letting water in
- Moss and dirt in joints with no sealant left
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Keep soil, plants and ivy away from the joints
- Make sure movement joints aren’t pointed over
- Check external joints each spring
- Tell anyone working on the walls about the movement joints
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
About our external mastic in Cold Harbour
Low-level joints can usually be done from the ground. For joints higher up, give us some details of the building and we will confirm what’s needed to reach them safely. If you have failed seals between different materials and failed sealant between panels on a façade, we can put it right, whatever the surface.
Older homes in small places like Cold Harbour may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
We stand behind the work with a one-year guarantee, so you’re covered after we’ve gone.
- Place
- Cold Harbour (ME17)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Why it’s worth doing now in Cold Harbour
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. In a small place like Cold Harbour, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Why book with us
- Quality sealants from Arbo and Everbuild
- Every job guaranteed for a year
- We agree the colour with you first
- Old sealant always removed completely
Read what affects the cost and our reviews.
Nearby places to Cold Harbour
Also in Cold Harbour
What sealant work cannot fix
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Rising or penetrating damp from elsewhere in the wall
- Cracks in the bricks or render themselves, away from the joints
- Structural movement, which needs a surveyor or engineer
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Façade panels
- Joints between brick and frames
- Concrete & block
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- The product the joint needs
- Access and height
- Mould in or behind the old joints
- The old material and how stubborn it is
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
What to tell us for a quote
To make quoting easier, please include:
- Where the property is
- How we’d reach the joints
- If someone has resealed it before
- How many joints, rooms or windows are involved
Every job is quoted individually. Simply phone 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
How it works
You do not need to clear the whole room or building, just the space around the work. We protect the rest, and the work takes a few hours to a few days, depending on the length of joint and the access in most cases. In a small place like Cold Harbour, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or drop us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Landlord and commercial work in Cold Harbour
We also work for property managers and facilities teams. Several sites can go on one quote, and we’re fully insured for the work.
Landlords and agents in Cold Harbour can book us as well as householders. Sealant work between tenants keeps a property looking cared for.
Common questions in Cold Harbour
Can you do external mastic in Cold Harbour?
Yes. We work across London and the South East, and Cold Harbour is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Can you help a landlord with a rental near Charing station?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Are you fully insured?
Yes. Full insurance covers our work.
Can you seal joints between render and window frames?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little.
Can you reach joints on upper floors?
It depends on the height and the site. Low-level joints are straightforward; for higher ones, send details and we’ll confirm the access.
Cold Harbour buildings and the weather
Historic houses like Belmont House and Gardens (about 3.8 miles north-east) are a reminder that the area around Cold Harbour has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. 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.
For an older house near a landmark such as Church of St Lawrence, older walls, gutters and the joints where extensions meet them need a flexible sealant. Rented homes near Charing station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Cold Harbour is about 7 miles south-west of Faversham, in Kent. Across the ME17 area, our applicators can take on external mastic. Cold Harbour is one of 922 places in Kent where we work. For nearby work, see our Chelmsford page (37 miles or so).
We work across ME17 for external mastic and the streets around it. Other places close to Cold Harbour include Warren Street (1 mile north-west), Payden Street (1 mile north-west), Lenham Heath (2 miles south-west), Charing Heath (2 miles south) and Lenham Forstal (2 miles south-west). We also work in nearby towns such as Maidstone (11 miles west), Ashford (8 miles south-east), Canterbury (14 miles east), Sittingbourne (7 miles north), Whitstable (14 miles north-east) and Faversham (7 miles north-east).
Around Cold Harbour
Around Cold Harbour, our work takes us to homes and buildings near The Harrow pub and Spuckles and Kennelling Woods. Cold Harbour’s nearest station is Charing station, roughly 2.3 miles south of the centre. Nearby you will also find Newnham Castle (3.4 miles north).
Surface by surface
Copings and trims
A failed coping joint lets water into the top of the wall. Sealing them early saves the wall below.
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so neither cracks the other.