Essex · England
External Mastic in Walton-on-the-Naze
External mastic for Walton-on-the-Naze, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Joints pointed up with cement by mistake
- Leaking joints around cladding and façade panels
- Water getting into walls through failed joints
External mastic in Walton-on-the-Naze, done properly
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. Typical jobs include hard, crazed mastic that has stopped moving and sealant that has lost its bond to the brick or render, across joints between brick and frames, copings & trims and brickwork movement joints.
Around Walton-on-the-Naze, garages, outbuildings and extensions all add to the joints on the outside of a home. Leaks usually start at a gutter end, a garage door frame or where an extension meets the house.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Walton-on-the-Naze (CO14, CO13)
- Wider area
- Essex
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What sealant work can’t fix
New sealant cannot fix everything, and we’ll tell you before work begins. Sealant won’t put right:
- Cracked brickwork or render that needs a builder or plasterer
- Movement that’s more than a sealant joint can take
- Rising or penetrating damp from elsewhere in the wall
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Concrete & block
- Copings & trims
- Render & cladding joints
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
Also near Walton-on-the-Naze
Other services in Walton-on-the-Naze
What happens on the day
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. For a job in Walton-on-the-Naze, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- 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
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
Get a quote
Want a quote for external mastic? Please ring 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear quote before any work starts.
Related advice
DIY versus a professional finish
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
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, then guaranteed for a year.
Walton-on-the-Naze: your questions answered
Does living near the coast affect external mastic in Walton-on-the-Naze?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Do you work for landlords with property near Walton-On-The-Naze station?
Yes. We work for landlords and letting agents as well as homeowners. You can call 0345 464 0079 or email us with the details for a clear quote.
Can a movement joint be filled with mortar?
No. Rigid materials cannot move with the wall, so the joint stops doing its job. Where a joint has been mortared, it can often be raked out and sealed properly.
Is there a guarantee?
Yes: twelve months. If anything isn’t right with the work within the year, let us know and we will sort it.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
What is backing rod for?
That is backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only.
What’s an expansion joint in brickwork?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
How often do external joints need resealing?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Every job carries our 12-month guarantee.
Surface by surface
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. We choose the product to suit.
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
For landlords and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Landlords and agents in Walton-on-the-Naze can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Signs you need external mastic in Walton-on-the-Naze
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
If you can see any of these, it’s time to have the joints looked at:
- Leaking joints around cladding and façade panels
- Movement joints with cracked, split or missing sealant
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
Rented homes near Walton-On-The-Naze station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Before booking anyone
- How long to leave it before use
- What guarantee comes with the work
- Who turns up on the day
- Whether you can choose the colour
Walton-on-the-Naze buildings and the weather
Walton-on-the-Naze is close to 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, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around Church of All Saints, the joints between older walls, newer extensions and the roofline need a sealant that can move. For site and facilities teams at buildings such as Walton on the Naze Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Walton-on-the-Naze is about 6 miles south of Harwich, in Essex. We provide external mastic to homes and businesses in Walton-on-the-Naze and nearby. Our Essex coverage runs to 644 places, Walton-on-the-Naze among them. Our Chelmsford page covers work nearby, about 34 miles away.
All of CO14 and CO13 is covered for external mastic, from the main roads to the quietest streets. External mastic is available to properties on Church Road, High Street and Victoria Road. Walton-on-the-Naze is on the B1034 and B1336, so it’s easy for us to get to. Neighbouring places we cover for external mastic include Frinton-on-Sea (1 mile south-west), Kirby Cross (1 mile west), Kirby-le-Soken (2 miles west), Great Holland (3 miles south-west) and Lane End (3 miles west). Within a short drive, we also cover Clacton-on-Sea (6 miles south-west), Harwich (6 miles north), Greenstead (14 miles west), Wivenhoe (13 miles west), Brightlingsea (11 miles west) and West Mersea (15 miles west).
Landmarks near Walton-on-the-Naze
Locally, jobs take us to homes and businesses close to Tendring Technology College, The Victory pub and Frinton Park and the streets around them. Walton-on-the-Naze has its own railway station: Walton-On-The-Naze station. For a walk, there’s The Naze Nature Reserve.
Leave it or put it right?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render, so the damage spreads beyond the joint. In a smaller place like Walton-on-the-Naze, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
Doing several joints on one visit is normally more efficient than separate visits. You’ll get one clear quote for the whole job.
Why us?
- Experience in homes, commercial sites and hotels
- Rated 4.9 stars on Google
- Colour agreed with you before we start
- 20+ years of sealant experience
Take a look at our cost guide or customer reviews.