Kent · England
Bishopsbourne External Mastic
Movement joints in Bishopsbourne need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Panel joints letting water in
- Moss and dirt in joints with no sealant left
- Cracked joints where brick meets render or frames
Bishopsbourne: your questions answered
I let a flat near Bekesbourne station. Can you help?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Can you do external mastic in Bishopsbourne?
Yes. We work across London and the South East, and Bishopsbourne is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render so the joint does not draw the eye.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
What is a movement joint?
Brickwork, render and cladding all move a little, so long walls have planned gaps to take that movement. It’s closed with backing rod and a flexible sealant.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Where is Mr Mastic based?
Our base is Crawley. We work across South East England, London and Scotland.
External mastic for homes and businesses in Bishopsbourne
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, so once it splits or hardens, the joint stops working and water gets in. We work on façade panels, copings & trims and render & cladding joints, and people most often call us about moss and dirt in joints with no sealant left and sealant pulling away from one side of the joint.
Around Bishopsbourne, 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.
Big or small, it’s backed by our one-year guarantee in Bishopsbourne and across Kent.
- Location
- Bishopsbourne (CT4)
- Region
- Kent
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Point out the joints to other trades
- Clear growth from the base of walls and joints
- Make sure movement joints aren’t pointed over
- Ask before painting over external sealant
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick.
Walls and rooflines in Bishopsbourne
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. With historic houses such as Goodnestone Park (about 4.1 miles east) nearby, there’s older building stock in the area around Bishopsbourne as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
If you live in an older home near Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain.
Bishopsbourne is about 4 miles south-east of Canterbury, in Kent. Homes, rented property, offices and hotels in Bishopsbourne can book us for external mastic. The work is guaranteed for a year. Across Kent, we cover 922 places, and Bishopsbourne is one of them. Chelmsford is on our list too, around 45 miles away.
Every address in CT4 is within our area for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on The Street, Park Lane and Crows Camp Road or a nearby road, our applicators can take on the job. We also cover Kingston (1 mile south-east), Bridge (1 mile north), Out Elmstead (1 mile south-east), Marley (1 mile south) and Patrixbourne (2 miles north). We also work in nearby towns such as Ashford (13 miles south-west), Canterbury (4 miles north-west), Margate (15 miles north-east), Dover (10 miles south-east), Folkestone (10 miles south) and Ramsgate (14 miles north-east).
Around Bishopsbourne
Typical jobs here are in homes near The Mermaid Inn. For rail, the closest station is Bekesbourne station, about 2.2 miles north of the centre. A little further out are Canterbury Castle (4.1 miles north-west) and Kent and Canterbury Hospital (3.2 miles north-west).
What we are called out for in Bishopsbourne
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
Any of these means the joints need attention:
- Weathered mastic that no longer stretches
- Sealant that has lost its bond to the brick or render
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
If you let a flat or house near Bekesbourne station, split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- How long to leave it before use
- How the surfaces are prepared before sealing
- Whether you can choose the colour
- How much experience the applicator has
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes anything from a few hours to several days, depending on the building. In a small place like Bishopsbourne, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- For business premises, tell us about site rules or sign-in
- Tell us about any water getting in
- Clear items away from the joints we are working on
Get a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we’ll take it from there.
Related advice
Leave it or put it right?
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. A flexible sealant over backing rod is what the joint needs. Around Bishopsbourne, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What you get with us
- ARBOMaster approved applicator
- 20+ years of sealant experience
- Anti-fungal sanitary silicone in wet areas
- Colour picked to suit the job
See what affects the cost and our reviews.
Places near Bishopsbourne
Other services in Bishopsbourne
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
What the job involves on each surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant so neither cracks the other.
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant coloured to suit the wall.
What we can’t put right
New sealant can’t fix everything, and we’ll tell you before any work starts. It won’t solve:
- Structural movement, which needs a surveyor or engineer
- Cutting new joints into brickwork, which is building work rather than sealant work
- Render that’s blown, hollow or coming away
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Where we work in Bishopsbourne
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
- Copings & trims
- Render & cladding joints
- Façade panels