Kent · England
External & façade joints in Sandgate, Kent
External mastic for Sandgate and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Weathered mastic that no longer stretches
- Brick movement joints where the sealant has split
- Damp patches traced to an open external joint
Questions from Sandgate
Will you come out to Sandgate?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is external mastic in a coastal place like Sandgate any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Is it OK to fill a movement joint with cement?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose, and the wall may crack nearby. We’ll reseal it with a flexible sealant.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Can I add another job to the visit?
Yes. Just list everything you need.
What do you need from me for a quote?
Let us know what needs doing and where. We will ask anything else we need to know.
Do you guarantee your work?
Yes, for a year. If anything is not right with the work within the year, let us know and we’ll sort it.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only, which would stop it stretching.
About our external mastic in Sandgate
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. Typical jobs include hard, crazed mastic that has stopped moving and water getting into walls through failed joints, across concrete & block, brickwork movement joints and render & cladding joints.
Outside joints can only be sealed when they’re dry, so work in Sandgate is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we will put it right.
- Place
- Sandgate (CT20, CT50)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Deal with leaking gutters that soak the joints below
- Leave the joints unpainted unless we’ve said otherwise
- Wash walls gently around the sealant
- Tell anyone working on the walls about the movement joints
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint.
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 which cost more to put right than the joint.
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Why deal with it now?
Water gets in through a failed movement joint and can run behind render or cladding. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. In a small place like Sandgate, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why book with us
- Anti-fungal sanitary silicone in wet areas
- Colour picked to suit the job
- Approved under the ARBOMaster scheme
- One-year guarantee on every job
Read how sealant jobs are priced and customer reviews.
Outside joints around Sandgate
Sandgate is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. With historic houses such as Acrise Place (about 4.4 miles north) nearby, there’s older building stock in the area around Sandgate 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.
Schools such as The Folkestone School for Girls are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Homes close to Church of St Paul include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. For landlords with property near Folkestone West station, split movement joints are easy to miss on a rental until damp shows inside.
Sandgate is about 1 mile south-west of Folkestone, in Kent. Every kind of property in Sandgate is covered for external mastic. The work is guaranteed for a year. Across Kent, we cover 922 places, Sandgate among them. We also work in Chelmsford, around 54 miles away.
Work in CT20 and CT50 is quoted and booked the same way as anywhere else. You will find streets such as East Road, Gough Road and Castle Road, all of which we cover. Other places close to Sandgate include Cheriton (1 mile north), Seabrook (1 mile west), Folkestone (1 mile north-east), Newington (2 miles north-west) and Peene (2 miles north-west). Larger places within reach include Ashford (13 miles west), Canterbury (14 miles north), Dover (8 miles north-east), Deal (15 miles north-east), Hythe (3 miles west) and Tower Hamlets (8 miles north-east).
Near you in Sandgate
Around Sandgate, our work takes us to homes and buildings near Lower Leas Coastal Park, Ship Inn and School of English Studies. For rail, the closest station is Folkestone West station, roughly 0.8 miles north-east of the centre. Nearby you’ll also find Folkestone Museum (1.6 miles east) and Sandgate Castle (less than half a mile east). Not far away are Sugar Loaf Hill.
How the job changes by surface
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Concrete and blockwork
The face of concrete or block is often dusty, so preparation is key. A primer goes on where the product requires one before the bead.
How the visit works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours to a few days, depending on the length of joint and the access, and the area is left clean. Somewhere like Sandgate needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- On commercial sites, let us know about site rules
- Move anything stored near the joints
- Tell us if parking is tricky
How to get a quote
If you are in Sandgate and need external mastic, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Related advice
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
What sealant work cannot fix
We will always be straight with you, so here’s what new sealant will not do:
- Walls that need new movement joints cut into them
- Structural movement, which needs a surveyor or engineer
- Cracked brickwork or render that needs a builder or plasterer
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before you book.
Joints and surfaces we work on
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
- Façade panels