Kent · England
External Mastic in Broadstairs
We cover Broadstairs for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Joints pointed up with cement by mistake
- Sealant pulling away from one side of the joint
- Weeds or debris growing in open joints
How we handle external mastic in Broadstairs
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant. We are often asked to deal with joints where the bead has come unstuck and hard, crazed mastic that has stopped moving, across render & cladding joints, brickwork movement joints and façade panels.
Around Broadstairs, outside jobs take in garage door frames, porches, gutters and trims as well as walls. Where two materials meet, they move differently, and the sealant has to allow for it.
All of our work is guaranteed for twelve months, in Broadstairs and everywhere else we cover.
- Where
- Broadstairs (CT10, CT9, CT12)
- Wider area
- Kent
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Act on the first splits you see
- Deal with leaking gutters that soak the joints below
- Wash walls gently around the sealant
- Check external joints each spring
Do not paint over the new sealant unless we have said the product is paintable. Paint can crack on a flexible joint.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
DIY versus a professional finish
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 biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Why it’s worth doing now in Broadstairs
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner so it’s worth doing right. Gaps in sealant and mould in the bead never get better on their own, and in a busy household in Broadstairs they spread with every shower and every downpour. Replacing the sealant now is the simplest fix.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Why choose Mr Mastic in Broadstairs
- Sealant colour chosen to suit
- Anti-fungal sanitary silicone in wet areas
- A choice of colours where the product allows
- ARBOMaster approved applicator
Take a look at how sealant jobs are priced or customer reviews.
What external mastic looks like in Broadstairs
Broadstairs is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. 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 Quex Park (about 4.7 miles west) are a reminder that the area around Broadstairs has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
If you live in an older home near Parish Church of St Peter the Apostle, older walls, gutters and the joints where extensions meet them need a flexible sealant. For landlords with property near Broadstairs station, split movement joints are easy to miss on a rental until damp shows inside. Schools such as St Joseph's Catholic Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Broadstairs is about 16 miles east of Canterbury, in Kent. Broadstairs gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Kent coverage runs to 922 places, Broadstairs among them. Chelmsford is on our list too, around 48 miles away.
All of CT10, CT9 and CT12 is within our area for external mastic, from the main roads to the quietest streets. We cover properties on High Street, Union Square and Church Road and the roads around them. Broadstairs is on the A254 and A255, so it’s easy for us to get to with everything needed for external mastic. Neighbouring places we cover for external mastic include Upton (1 mile south-west), St Peter's (1 mile north-west), Northwood (1 mile south-west), Kingsgate (2 miles north) and Northdown (2 miles north). Within a short drive, we also cover Deal (10 miles south), Herne Bay (13 miles west), Walmer (11 miles south), Whitfield (15 miles south-west), Sandwich (7 miles south-west) and Aylesham (14 miles south-west).
Near you in Broadstairs
We work in homes and buildings around The Charles Dickens School, The Charles Dickens School and The Little Albion Inn, among other places. There’s a railway station in Broadstairs itself: Broadstairs station. Well-known places in the area include Queen Elizabeth the Queen Mother Hospital (2 miles north-west) and Westwood Cross (1.5 miles west). For a walk, there’s Sandwich and Pegwell Bay.
Honest limits
A few problems are outside what sealant work can do:
- Cracked brickwork or render that needs a builder or plasterer
- Subsidence or other structural problems
- Adding movement joints to masonry that has none
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
What we seal
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Copings & trims
- Façade panels
- Brickwork movement joints
For landlords and businesses
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
If you manage several properties in or around Broadstairs, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
Broadstairs: your questions answered
Do you work for landlords with property near Broadstairs station?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
Is Broadstairs in your area for external mastic?
Yes, Broadstairs is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will explain our choice.
Where do you work from?
Mr Mastic is based in Crawley. We cover Broadstairs and the rest of Kent, along with the rest of our area.
Will the new joint stand out?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so the joint doesn’t draw the eye.
Can you do several jobs on one visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
What is a movement joint?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It should be filled with flexible sealant, never mortar.
How long does external mastic take?
As a guide, most jobs take a few hours for a handful of joints, longer for a whole elevation. Larger jobs naturally take longer, and we will say how long yours will take.
What we do, step by step
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and clear up. It usually takes anything from a few hours to several days, depending on the building. In Broadstairs, parking is rarely complicated, though it helps to know about driveways or restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Tell us about any water getting in
- Mention any parking rules near the property
- Try not to wet indoor joints just before the visit
Get a quote
Getting a quote is simple: let us know the job and the location and its rough size. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.
Advice
How the job changes by surface
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. If that is happened, we rake it out and reseal it properly where it can be done safely.
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. We prime where the sealant needs it.