Kent · England
External & façade joints in Dargate, Kent
Professional external mastic in and around Dargate, with every bit of old sealant taken out first and a one-year guarantee.
- Weathered mastic that no longer stretches
- Joints where the bead has come unstuck
- Movement joints filled with mortar instead of sealant
Quotes for external mastic in Dargate
You’ll get a clear quote before work begins. It takes into account:
- Whether old sealant or filler has to be cut out
- The size of the job
- How many areas need sealing
- Access and height
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
What we need to know
There’s no need for technical detail. Just tell us:
- Where the property is
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
For external mastic in Dargate, 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 we start.
External mastic in Dargate
On houses, flats and commercial buildings across Dargate, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. Common call-outs are for old sealant gone brittle and cracked and failed sealant between panels on a façade, on concrete & block, render & cladding joints and copings & trims.
Outside joints can only be sealed when they’re dry, so work in Dargate is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
Whatever the size of the job, you get the same 12-month guarantee.
- Where
- Dargate (ME13)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
The process
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. Somewhere like Dargate 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.
- 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.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
Advice
Nearby places to Dargate
More services for Dargate
When something else is needed
A few problems are outside what sealant work can do:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Subsidence or other structural problems
- Loose or hollow render, which needs re-rendering
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer.
Surfaces we seal
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Concrete & block
- Joints between brick and frames
- Copings & trims
External mastic in Dargate: local notes
Dargate is within about 3 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Selling station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. For site and facilities teams at buildings such as Hernhill Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Dargate is about 4 miles south-west of Whitstable, in Kent. Our applicators cover external mastic for homes and businesses in Dargate and the surrounding area. We cover 922 towns and villages across Kent, from the larger towns to small villages. There’s also a page for Chelmsford, about 36 miles away.
Jobs for external mastic in ME13 is quoted and booked the same way as anywhere else. External mastic is available to properties on Butler's Hill and Plumpudding Lane and the roads around them. Neighbouring places we cover for external mastic include Hernhill (1 mile south-west), Waterham (1 mile north), Highstreet (1 mile north-east), Slutshole (1 mile south-west) and Staplestreet (1 mile south-west). Within a short drive, we also cover Ashford (13 miles south), Canterbury (5 miles south-east), Sittingbourne (11 miles west), Whitstable (4 miles north-east), Faversham (4 miles west) and Herne Bay (8 miles north-east).
Landmarks near Dargate
In Dargate, that means homes and buildings near Red Lion pub and Mount Ephraim Gardens, among other places. The closest station to Dargate is Selling station, about 3 miles south-west. Well-known places in the area include Whitstable and Tankerton Hospital (4.5 miles north-east) and Tankerton Castle (4.2 miles north-east). For a walk, there’s Blean Woods RSPB Reserve.
How the job changes by surface
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so its sealant has to stay flexible.
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and protects the render itself.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
When to call us in Dargate
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
Keep an eye out for these signs:
- Moss and dirt in joints with no sealant left
- Hard, crazed mastic that has stopped moving
- Failed seals between different materials
- Movement joints filled with mortar instead of sealant
In the older streets around Church of St Michael, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Questions to ask before you book
- What the cure time is
- How hidden problems are handled
- How the colour is chosen
- What guarantee comes with the work
Leave it or put it right?
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, rather than the wall around it. In a small place like Dargate, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first and send you a clear quote before work begins.
Why Dargate clients choose us
- Full insurance on every job
- ARBOMaster approved applicator
- White, clear, grey or coloured to suit, where the product allows
- Sealant colour chosen to suit
See our cost guide and what customers say.
Common questions in Dargate
Do you cover smaller places like Dargate?
Yes, Dargate is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you work for landlords with property near Selling station?
Yes, we work for landlords and agents. Just call 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
What is a movement joint?
Brickwork, render and cladding all move a little, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
What information do you need?
Tell us what needs doing and where, with photos by email if possible. If we need more, we’ll ask.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
How long does external mastic last?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Every job carries our 12-month guarantee.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.