Kent · England
External & façade joints in Sandway, Kent
External mastic in Sandway from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Weathered mastic that no longer stretches
- Sealant pulling away from one side of the joint
- Weeds or debris growing in open joints
How we handle external mastic in Sandway
A movement joint is a deliberate break that lets a wall expand and contract. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. Typical jobs include joints pointed up with cement by mistake and moss and dirt in joints with no sealant left, on copings & trims, concrete & block and façade panels.
External sealant needs dry, clean surfaces, so work around Sandway is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
Each job carries a 12-month guarantee, large or small.
- Place
- Sandway (ME17)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Sandway
There’s no set price list, because no two jobs are the same. What we look at:
- Whether the work is at height
- How many rooms, windows or areas are involved
- The size of the job
- When we can work, for business premises
Combining jobs into one visit usually makes better use of the time than several visits. We will send you a clear quote for the lot.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- If someone has resealed it before
- The rough size of the job
- A few photos by email, if you can
- If it’s domestic, commercial or a hotel
For external mastic in Sandway, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
Do you need external mastic in Sandway?
Using the wrong sealant is another common reason. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
It’s worth asking for a quote if you see:
- Failed sealant between panels on a façade
- Weeds or debris growing in open joints
- Damp patches traced to an open external joint
- Joints pointed up with cement by mistake
For site and facilities teams at buildings such as Platts Heath Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Questions to ask before you book
- Which colour the sealant will be
- Is the old sealant removed completely?
- How long the guarantee is
- How long to leave it before use
Your questions about external mastic in Sandway
Is Sandway in your area for external mastic?
Yes, Sandway is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.
Will you come out to Sandway?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Are you insured?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Is it OK to fill a movement joint with cement?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Can new sealant go over the old?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Sandway buildings and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Leeds Castle (about 3.3 miles north-west) nearby, there’s older building stock in the area around Sandway as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
In the older streets around St Mary's Church, an extension built onto an older house moves differently, and the joint between them takes the strain. Rented homes near Lenham station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Sandway is about 8 miles east of Maidstone, in Kent. Our applicators cover external mastic for householders, landlords and businesses in Sandway and nearby. Across Kent, we cover 922 places, and Sandway is one of them. For nearby work, see our Chelmsford page, about 36 miles away.
Work in ME17 is quoted and booked the same way as anywhere else. Streets in the area include Headcorn Road, Sandway Road and Old Ham Lane. If you’re just outside Sandway, we cover Platt's Heath (1 mile south-west), Liverton Street (1 mile south-west), Boughton Malherbe (1 mile south), Marley (1 mile north-west) and Harrietsham (1 mile north-west). Further out, we also cover Maidstone (8 miles west), Ashford (9 miles south-east), Sittingbourne (8 miles north), Faversham (10 miles north-east), Minster (14 miles north) and Kings Hill (13 miles west).
Landmarks near Sandway
We work in homes and buildings around Kiln Wood, The Lenham School and Wishful Thinker pub. The nearest railway station is Lenham station, about 0.5 miles north-east. A little further out are The Dog Collar Museum (3.2 miles north-west) and Coldbridge Castle (2.1 miles south).
DIY sealant or a professional job?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
A DIY attempt does not rule out a professional job. We cut it out and start again.
What the job involves on each surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible in all weathers.
When something else is needed
A few problems are outside what sealant work can do:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracking across the wall rather than at a joint
- Damp that isn’t coming from the joint
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly before booking.
What we seal
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Façade panels
- Render & cladding joints
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Ask before painting over external sealant
- Show decorators and builders where the movement joints are
- Fix overflowing gutters above sealed joints
- Check external joints each spring
Only paint over the joint if we have confirmed the sealant can take paint. Paint can crack on a flexible joint.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
What happens on the day
There’s no need to move everything out, only the area right around the joints. We protect the rest, and the work takes anything from a few hours to several days, depending on the building for a typical job. Somewhere like Sandway needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any leaks or damp you’ve noticed
Get a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. Photos by email help us understand the job.