Kent · England
External & façade joints in Gravesend, Kent
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Gravesend and across Kent. Fully insured, ARBOMaster approved and guaranteed for a year.
- Movement joints with cracked, split or missing sealant
- Rain getting behind render or cladding at a joint
- Failed sealant between panels on a façade
How it works
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to several days, depending on the building. For a job in Gravesend, we need access to where the work is and somewhere nearby to park. For outside work, let us know about side access, gates and any upper-floor joints.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Clear the area around the work
- Tell us if parking is tricky
Get a quote
We don’t publish a price list, because every job is different. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or email us.
Related advice
How we handle external mastic in Gravesend
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. We work on façade panels, brickwork movement joints and joints between brick and frames, and common reasons people get in touch are sealant pulling away from one side of the joint and cracked joints where brick meets render or frames.
Extensions are a common sight on houses around Gravesend, and the line where an extension meets the original house is a common leak point. Sealing it properly means the right joint depth and a flexible sealant, not a quick bead.
There’s a 12-month guarantee on every job, large or small.
- Where
- Gravesend (DA12, DA11)
- Region
- Kent
- Cover
- A year, on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Also near Gravesend
Other services in Gravesend
Aftercare tips
Aftercare is simple:
- Keep water from gutters off the wall
- Have failed joints looked at early
- Ask before painting over external sealant
- Never let anyone fill a movement joint with mortar
Don’t let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
A joint that has stopped moving pushes the movement elsewhere, generally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Different surfaces, different methods
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap so the sealant isn’t too deep.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod.
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Landlords and letting agents in Gravesend can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
External mastic in Gravesend: local notes
Gravesend is within about 2 miles of 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. Historic houses like Cobham College (about 2.9 miles south) are a reminder that the area around Gravesend has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
In the older streets around Christ Church Milton, older walls, gutters and the joints where extensions meet them need a flexible sealant. If you let a flat or house near Gravesend station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. Managing a site like Whitehill Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Gravesend is about 9 miles north-west of Gillingham, in Kent. Homes, rented property, offices and hotels in Gravesend is covered for external mastic. Every job comes with our 12-month guarantee. Our Kent coverage runs to 922 places, Gravesend among them. For nearby work, see our London page, about 21 miles away.
All of DA12 and DA11 is covered for external mastic, from the main roads to the quietest streets. We cover properties on Christ Church Road, Hillside Drive and Laurel Avenue and the roads around them. Gravesend sits on or near the A2 and A226. Close by, we work in Windmill Hill (1 mile north-west), Milton-next-Gravesend (1 mile north-east), Denton (1 mile east), Singlewell or Ifield (1 mile south) and Northfleet (1 mile west). Further out, we also cover Maidstone (13 miles south-east), Dartford (7 miles west), Sevenoaks (13 miles south-west), Swanley (9 miles west), Kings Hill (11 miles south) and Foley Park (12 miles south-east).
Around Gravesend
Locally, jobs take us to homes and businesses close to Northfleet Urban Country Park, St John's Catholic Comprehensive and St John's Catholic Comprehensive, among other places. For rail, the closest station is Gravesend station, roughly 0.9 miles north-west of the centre. Nearby you’ll also find Gravesham Museum (0.9 miles north-west) and Stone Castle (4.5 miles west). Green spaces nearby include Sawyers Lake and Gad's Hill.
Why deal with it now?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way. Gaps in sealant and mould in the bead never get better on their own, and in a busy household in Gravesend they spread with every shower and every downpour. Now is the easy time to put it right.
The cost reflects the work involved, not a rough estimate. That’s why we ask a few questions first.
Why us?
- Quality sealants from Arbo and Everbuild
- You choose the colour before work begins
- White, clear, grey or another colour, product permitting
- A 12-month guarantee on all work
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Gravesend questions
Does the coastal weather in Gravesend affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Do you cover Gravesend for external mastic?
Yes. We work across London and the South East, and Gravesend is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
How often do external joints need resealing?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year and reseal when it splits.
Where do you work from?
We work from Crawley. Our applicators cover Gravesend, along with the rest of our area.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area.
I’m a tenant. Can you help?
We’re happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Is it messy?
No. We protect the surfaces around the joints, and we tidy up before we go.
Quotes for external mastic in Gravesend
The price is agreed before any work begins. It’s based on:
- Any mould that needs treating
- The type of sealant required
- How many areas need sealing
- When we can work, for business premises
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Roughly how big the job is
- The type of property
- The address or postcode of the job
- Access, such as stairs, a lift or height
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work.