Kent · England
External & façade joints in Whitstable, Kent
Specialist external mastic for Whitstable: careful preparation, the right product and tidy work. Call for a quick quote.
- Rigid filler in a joint that should flex
- Weeds or debris growing in open joints
- Gaps where render, brick and frames meet
Do you need external mastic in Whitstable?
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.
People normally contact us after spotting something like this:
- Cracked joints where brick meets render or frames
- Weeds or debris growing in open joints
- Water getting into walls through failed joints
- Rigid filler in a joint that should flex
If you live in an older home near Church of St John (Methodist), an extension built onto an older house moves differently, and the joint between them takes the strain.
Comparing quotes
- What guarantee comes with the work
- How the colour is chosen
- Is the old sealant removed completely?
- How the surfaces are prepared before sealing
External mastic in Whitstable, done properly
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where mortar or filler would crack. Typical jobs include movement joints with cracked, split or missing sealant and damp patches traced to an open external joint, across joints between brick and frames, brickwork movement joints and façade panels.
Garage door frames, porches and roofline trims are all part of external work in a town like Whitstable. Each joint between different materials moves in its own way, so the sealant has to cope with that.
You’re covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or email us.
- Place
- Whitstable (CT5)
- Region
- Kent
- Cover
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Can I do it myself?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
What we do, step by step
At the end, we look at the finished work together. The work normally takes a few hours to a few days, depending on the length of joint and the access, depending on how much there is to do. A visit in Whitstable needs access to the work and a place to park close by. For outside work, let us know about side access, gates and any upper-floor joints.
- Each joint is checked and the colour of the new sealant agreed.
- 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
- Keep children and pets away from the work area
- Tell us if parking is tricky
- Tell us about any water getting in
Get a quote
Every job is quoted individually, so the first step is telling us about yours. Just call 0345 464 0079 or email us with the details.
Related advice
What affects the cost of external mastic
We quote each job individually. This is what makes a difference:
- Whether there’s mould to deal with
- The amount of work
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
What we need to know
There’s no need for technical detail. Just tell us:
- A few photos by email, if you can
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved.
What happens if it’s left?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. Draughts from a gap round a frame, damp under a sill or water behind a bath panel all start small, and early is when they’re cheapest and quickest to sort.
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why book with us
- 12-month guarantee on every job
- 4.9 on Google from 180+ five-star reviews
- White, clear, grey or coloured to suit, where the product allows
- Homes, businesses and hotels
Read what affects the cost and customer reviews.
Places near Whitstable
What else we do in Whitstable
FAQs for Whitstable
I let a flat near Whitstable station. Can you help?
Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. You can phone 0345 464 0079 or email us with the details for a clear quote.
Do you cover Whitstable for external mastic?
Yes, Whitstable is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Can you seal joints between two different materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint before we leave.
Are you ARBOMaster approved?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few photos.
Are you fully insured?
Yes. We’re fully insured.
Where do you work from?
We’re a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
External mastic in Whitstable: local notes
Whitstable is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Whitstable station, split movement joints are easy to miss on a rental until damp shows inside. For site and facilities teams at buildings such as The Whitstable School, larger buildings have long runs of movement joint that eventually need resealing.
Whitstable is about 6 miles north-west of Canterbury, in Kent. Homes, rented property, offices and hotels in Whitstable is covered for external mastic. The work is guaranteed for a year. Our area takes in 922 places across Kent, from the larger towns to small villages. For nearby work, see our Chelmsford page, about 35 miles away.
Jobs for external mastic in CT5 works the same way as everywhere else we cover. External mastic is available to properties on High Street, Station Road and Cranleigh Gardens. Whitstable is on the A299 and A2990, so it’s easy for us to get to with everything needed for external mastic. If you’re just outside Whitstable, we cover Tankerton (1 mile north-east), Chestfield (1 mile east), Swalecliffe (2 miles east), Radfall (2 miles south-east) and Yorkletts (2 miles south-west). Further out, we also cover Canterbury (6 miles south-east), Margate (15 miles east), Sittingbourne (13 miles west), Faversham (7 miles west), Herne Bay (5 miles east) and Minster (11 miles north-west).
Around Whitstable
Locally, jobs take us to homes and businesses close to Foxes Cross Bottom, Whitstable Social Club pub and Whitstable Junior School and the streets around them. There’s a railway station in Whitstable itself: Whitstable station. Well-known places in the area include Whitstable and Tankerton Hospital (1 mile north-east) and Tankerton Castle (0.8 miles north). Green spaces nearby include West Blean and Thornden Woods.
Surface by surface
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. If that’s happened, we rake it out and reseal it properly if the joint can be cleared.
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
Landlord and commercial work in Whitstable
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.