Kent · England
External & façade joints in Highstreet, Kent
Sealing brickwork movement joints, render, cladding and façade joints in Highstreet, with a 12-month guarantee on every job. Ask us for a quote.
- Damp patches traced to an open external joint
- Cracked joints where brick meets render or frames
- Leaking joints around cladding and façade panels
How we handle external mastic in Highstreet
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. We work on concrete & block, render & cladding joints and joints between brick and frames, and common reasons people get in touch are rigid filler in a joint that should flex and rain getting behind render or cladding at a joint.
In a village or hamlet like Highstreet, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Highstreet (ME13)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What we cannot put right
Some problems need a builder, plumber or other trade rather than us:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Adding movement joints to masonry that has none
- Render that’s blown, hollow or coming away
If you are not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Copings & trims
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
- Concrete & block
Also in Highstreet
The process
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Highstreet, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Keep pets and children clear of the area while we work
- Clear the area around the work
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or email us with the details, and pictures are welcome.
Read more
Common questions in Highstreet
Can you help a landlord with a rental near Whitstable station?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Does the coastal weather in Highstreet affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Where is Mr Mastic based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses, and we’re fully insured.
Do you guarantee your work?
Yes, always. Each job is guaranteed for twelve months, wherever you are.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you do not need to watch us work.
How long does external mastic take?
As a guide, most jobs take a few hours to a few days, depending on the length of joint and the access. Bigger jobs take longer, and we will say how long yours will take.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Keep water from gutters off the wall
- Never let anyone fill a movement joint with mortar
- Wash walls gently around the sealant
- Ask before painting over external sealant
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.
Why deal with it now?
Water gets in through a failed movement joint, behind render and cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. Older cottages and farmhouses around Highstreet can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Doing several joints on one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will send you a clear quote for the lot.
Why choose Mr Mastic in Highstreet
- Old sealant always removed completely
- Over 20 years’ experience
- Anti-fungal silicone where joints get wet
- White, clear, grey or coloured to suit, where the product allows
What affects the cost of external mastic
We quote each job individually. These are the things that affect it:
- How many rooms, windows or areas are involved
- Any mould that needs treating
- How much there is to do
- Working hours on commercial sites
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we will go through it with you.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- What’s wrong with the joints now
- Pictures of the joints, sent by email
- If someone has resealed it before
- Whether it’s a home or a business
Need a quote? Please phone 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
What external mastic looks like in Highstreet
Highstreet 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. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. London and the South East are among 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, outside joints that have cracked can let damp into a rental, so check them between lets. Around Highstreet, as everywhere, external mastic is only as good as the preparation behind it.
Highstreet is about 3 miles south-west of Whitstable, in Kent. Homes, rented property, offices and hotels in Highstreet is covered for external mastic. Every job comes with our 12-month guarantee. Our area takes in 922 places across Kent. We also work in Chelmsford, about 36 miles from Highstreet.
Postcode districts we cover here for external mastic: ME13. Streets in the area include Thanet Way and Highstreet Road, and we cover them all. Neighbouring places we cover for external mastic include Waterham (1 mile west), Dargate (1 mile south-west), Seasalter (1 mile north), Hernhill (2 miles south-west) and Slutshole (2 miles south-west). Larger places within reach include Ashford (14 miles south), Canterbury (5 miles south-east), Sittingbourne (11 miles west), Whitstable (3 miles north-east), Faversham (4 miles west) and Herne Bay (7 miles north-east).
Landmarks near Highstreet
Typical jobs here are in homes near Foxes Cross Bottom and the streets around them. For rail, the closest station is Whitstable station, roughly 3 miles north-east of the centre. Nearby you’ll also find Whitstable and Tankerton Hospital (3.6 miles north-east) and Tankerton Castle (3.3 miles north-east). Green spaces nearby include Blean Woods RSPB Reserve.