Kent · England
Barnsole External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Barnsole, backed by a one-year guarantee. Call for a quick quote.
- Joints pointed up with cement by mistake
- Brick movement joints where the sealant has split
- Sealant that has lost its bond to the brick or render
External mastic in Barnsole, done properly
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. If you have joints where the bead has come unstuck and water getting into walls through failed joints, we can put it right, whatever the surface.
Around Barnsole, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water normally gets in, and they need the right sealant at the right depth.
All of our work is guaranteed for twelve months, in Barnsole and everywhere else we cover.
- Location
- Barnsole (CT3)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
FAQs for Barnsole
Do you cover smaller places like Barnsole?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Adisham station?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
How often do external joints need resealing?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Every job carries our 12-month guarantee.
Can you match the colour of my brickwork?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so the joint does not draw the eye.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
How much does external mastic cost in Barnsole?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before any work starts.
Why is there a gap in my brick wall?
Most straight vertical gaps in brickwork are movement joints. It lets the bricks expand without cracking and needs a flexible seal, not mortar.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
What affects the cost of external mastic
Your quote is based on your job. We take into account:
- Mould in or behind the old joints
- The number of rooms or windows
- How easy the joints are to reach
- When we can work, for business premises
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Ask us for a quote and we’ll explain what it covers.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Whether it has been sealed before
- The address or postcode of the job
- The type of property
- A few pictures by email, if you can
Need a quote? Please ring 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Movement that’s more than a sealant joint can take
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
Joints and surfaces we work on
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
- Façade panels
- Render & cladding joints
- Copings & trims
What we are called out for in Barnsole
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
The most common problems we see are:
- Joints pointed up with cement by mistake
- Gaps where render, brick and frames meet
- Joints where the bead has come unstuck
- Movement joints with cracked, split or missing sealant
Homes close to Church of St James include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Questions to ask before booking
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- What happens if the job turns out different
- How the joint is cleaned and prepared
Other services in Barnsole
How it works
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to several days, depending on the building, and the area is left clean. Somewhere like Barnsole needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Keep children and pets away from the work area
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
Every job is quoted individually, so start by telling us what you need. Just call 0345 464 0079 or drop us an email with the details.
Related advice
Outside joints around Barnsole
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. Historic houses like Goodnestone Park (about 2 miles south-west) are a reminder that the area around Barnsole has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Letting a property close to Adisham station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Barnsole is about 6 miles north-west of Deal, in Kent. Wherever you are in the CT3 postcode area, we can carry out external mastic at your property. Our Kent coverage runs to 922 places, Barnsole among them. Chelmsford is on our list too, about 47 miles from Barnsole.
Every address in CT3 is within our area for external mastic, from the main roads to the quietest streets. Whether your property is on Mill Lane, Meadow Gardens and Mill Road or anywhere close by, we can help. Other places close to Barnsole include Staple (1 mile north-west), Flemings (1 mile east), Durlock (1 mile north), Hammill Park (1 mile south-east) and Twitham (1 mile west). Further out, we also cover Canterbury (8 miles west), Margate (10 miles north-east), Dover (9 miles south), Folkestone (13 miles south), Ramsgate (8 miles north-east) and Broadstairs (10 miles north-east).
What’s near Barnsole
We work in homes and buildings around The Black Pig Inn and the streets around them. The closest station to Barnsole is Adisham station, about 3.1 miles south-west. A little further out are White Mill (3.1 miles north-east). Open spaces near Barnsole include Monk's Wall nature reserve.
Surface by surface
Copings and trims
A failed coping joint lets water into the top of the wall. Resealing them is a small job that protects a lot.
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. We choose the product to suit.
DIY versus a professional finish
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
For anyone letting property in or around Barnsole, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.