Kent · England
External Mastic in Guston
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Guston and across Kent. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Brick movement joints where the sealant has split
- Leaking joints around cladding and façade panels
- Joints where the bead has come unstuck
Walls and rooflines in Guston
Guston 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. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. With historic houses such as Walmer Castle (about 4.7 miles north-east) nearby, there’s older building stock in the area around Guston as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Managing a site like Duke of York's Royal Military School? Then larger buildings have long runs of movement joint that eventually need resealing. Rented homes near Martin Mill station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Guston is about 2 miles north-east of Dover, in Kent. Every kind of property in Guston is covered for external mastic. Every job comes with our one-year guarantee. Our Kent coverage runs to 922 places, Guston among them. Chelmsford is on our list too, about 54 miles from Guston.
All of CT15 is within our area for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on The Street, Chance Meadow and The Lane or a nearby road, we can help. Neighbouring places we cover for external mastic include East Langdon (1 mile north-east), Church Whitfield (1 mile north-west), West Cliffe (1 mile east), Martin Mill (2 miles north-east) and Charlton-in-Dover (2 miles south-west). Larger places within reach include Canterbury (14 miles north-west), Folkestone (8 miles south-west), Ramsgate (13 miles north), Broadstairs (15 miles north), Deal (5 miles north-east) and Hythe (12 miles south-west).
Around Guston
Around Guston, our work takes us to homes and buildings near Connaught Park, St Edmund's Catholic School and Swingate Inn, among other places. The nearest railway station is Martin Mill station, about 1.6 miles north-east of the centre. A little further out are Royal Victoria Hospital (1.9 miles south) and Dover Castle (1.8 miles south). Open spaces near Guston include Dover Western Heights.
How we handle external mastic in Guston
Movement joints let brickwork, render and cladding expand and shrink without cracking. 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. If you have joints where the bead has come unstuck and leaking joints around cladding and façade panels, we can help, whatever the surface.
Somewhere as small as Guston, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Guston (CT15)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Also near Guston
What else we do in Guston
Why act early in Guston
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. In a small place like Guston, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Combining jobs into one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Why us?
- Sealant colour chosen to suit
- 4.9 on Google from 180+ five-star reviews
- Trusted Arbo and Everbuild sealants
- Tidy, careful work
When something else is needed
A few problems are outside what sealant work can do:
- Cracks in the bricks or render themselves, away from the joints
- Cutting new joints into brickwork, which is building work rather than sealant work
- Movement that’s more than a sealant joint can take
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
Where we work in Guston
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
- Façade panels
- Concrete & block
Surface by 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.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. They’re resealed over backing rod with a low-modulus sealant in a colour to suit the brick.
For landlords and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
Quotes for external mastic in Guston
Call for a quick quote. What matters most is:
- Any mould that needs treating
- The product the joint needs
- How much there is to do
- Working hours on commercial sites
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Call for a quick quote and we will go through it with you.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- Photos by email, if that is easy
- How we’d reach the joints
- The rough size of the job
- Any previous sealing or DIY work
To get a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
Signs you need external mastic in Guston
If plants are growing out of a joint, the sealant has generally failed or was never there. Roots and dirt hold water against the wall and make things worse.
Signs it’s time to call us include:
- Weathered mastic that no longer stretches
- Rigid filler in a joint that should flex
- Plants rooting in failed movement joints
- Sealant pulling away from one side of the joint
Homes close to Church of St Martin of Tours include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Comparing quotes
- Which sealant they’ll use, and why
- How long to leave it before use
- How hidden problems are handled
- How the joint is cleaned and prepared
Questions from Guston
Is Guston within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
I let a flat near Martin Mill station. Can you help?
Yes. We work for landlords and letting agents as well as homeowners. Just ring 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
How often do external joints need resealing?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that generally means someone at home.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint.
Will the new joint stand out?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. Exterior sealants come in a good range of colours.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
The process
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes a few hours to a few days, depending on the length of joint and the access from start to finish. Somewhere like Guston 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.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know if you’ve seen damp or leaks
- Move anything stored near the joints
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or drop us an email with the details.