Kent · England
External & façade joints in Sandling, Kent
External mastic for Sandling and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Joints pointed up with cement by mistake
- Failed sealant between panels on a façade
- Joints where the bead has come unstuck
Signs you need external mastic in Sandling
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
Keep an eye out for these signs:
- Joints where the bead has come unstuck
- Moss and dirt in joints with no sealant left
- Failed seals between different materials
- Rigid filler in a joint that should flex
If you look after a building such as Brockhill Park Performing Arts College, its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- What happens if the job turns out different
- Who turns up on the day
- Whether you can choose the colour
- What product goes in the joint
About our external mastic in Sandling
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we will confirm what’s needed to reach them safely. We work on joints between brick and frames, façade panels and concrete & block, and people most often call us about weeds or debris growing in open joints and rigid filler in a joint that should flex.
In a village or hamlet like Sandling, 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.
Every job comes with a 12-month guarantee.
- Where
- Sandling (CT21)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Landlords and agents in Sandling can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
Sandling: your questions answered
Does living near the coast affect external mastic in Sandling?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Do you work for landlords with property near Sandling station?
Yes. We work for landlords and letting agents as well as householders. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Why do you put foam in the joint first?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little.
Where is Mr Mastic based?
We work from Crawley. We cover Sandling and the rest of Kent, along with the rest of our area.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Is it OK to fill a movement joint with cement?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. It needs a flexible sealant over backing rod.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, and for outside work we’ll agree access with you when we book.
Walls and rooflines in Sandling
Sandling is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Sandling station? Then outside joints that have cracked can let damp into a rental, so check them between lets. Homes close to Church of St Peter and St Paul include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Sandling is about 1 mile north-west of Hythe, in Kent. Whether you are in the middle of Sandling or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Our Kent coverage runs to 922 places, Sandling among them. We also work in Chelmsford, around 51 miles away.
Here we cover the CT21 postcode area for external mastic. Close by, we work in Saltwood (1 mile south-east), Pedlinge (1 mile south-west), Hythe (1 mile south-east), Westenhanger (1 mile west) and Newingreen (1 mile west). Within a short drive, we also cover Ashford (9 miles north-west), Canterbury (13 miles north), Dover (11 miles east), Folkestone (4 miles east), Tower Hamlets (11 miles east) and Hawkinge (4 miles north-east).
Local landmarks in Sandling
Typical jobs here are in homes near St Augustine's Catholic Primary School and Brockhill Country Park, among other places. Sandling has its own railway station: Sandling station. Other landmarks nearby include Saltwood Castle (0.9 miles south-east) and Hythe Museum (1.4 miles south-east). For a walk, there’s Tolsford Hill.
Nearby places to Sandling
Other services in Sandling
What we can’t put right
We won’t take on work that will not last, so here’s what sealant cannot put right:
- Damp that is not coming from the joint
- Movement that’s more than a sealant joint can take
- Cutting new joints into brickwork, which is building work rather than sealant work
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer.
Joints and surfaces we work on
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Render & cladding joints
- Façade panels
- Joints between brick and frames
The process
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from a few hours to several days, depending on the building. In a small place like Sandling, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at every joint and agree a colour to suit the wall.
- 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.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Tell us about any water getting in
- Mention any sign-in or site rules at work premises
- Keep children and pets away from the work area
Getting a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
Advice
Looking after it afterwards
So the new joints stay in good condition:
- Keep soil, plants and ivy away from the joints
- Fix overflowing gutters above sealed joints
- Check the sealant is paintable before painting near it
- Point out the joints to other trades
Only paint over the joint if we’ve confirmed the sealant can take paint. Many exterior sealants are not designed to be painted, and paint can crack as the joint moves.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
Different surfaces, different methods
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind and helps it last.
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. We prime where the sealant needs it before the bead.