Essex · England
External & façade joints in Great Dunmow, Essex
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Great Dunmow and across Essex. Fully insured, ARBOMaster approved and guaranteed for a year.
- Sealant that has lost its bond to the brick or render
- Movement joints with cracked, split or missing sealant
- Leaking joints around cladding and façade panels
External mastic for homes and businesses in Great Dunmow
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two where a rigid filler would soon crack. If you are dealing with failed sealant between panels on a façade and joints with sealant missing in places, we can help, whatever the surface.
Houses in smaller places like Great Dunmow can stand more in the open than those in a built-up town, so exposed walls and rooflines take more wind-driven rain. That’s where gutter joints and wall joints tend to fail first.
Your job is guaranteed for a year, as with all our work.
- Place
- Great Dunmow (CM6)
- Wider area
- Essex
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What we’re called out for in Great Dunmow
Using the wrong sealant is another common reason. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, and it tears off the sides.
People usually contact us after spotting something like this:
- Movement joints with cracked, split or missing sealant
- Cracked joints where brick meets render or frames
- Water getting into walls through failed joints
- Sealant pulling away from one side of the joint
Rented homes near Stansted Airport station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Comparing quotes
- Who turns up on the day
- When the joint can take water or movement
- How the joint is cleaned and prepared
- What happens if they find a problem under the old sealant
Nearby places to Great Dunmow
More services for Great Dunmow
Why act early in Great Dunmow
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 problem grows beyond the joint itself. In a smaller place like Great Dunmow, 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.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why book with us
- Colour picked to suit the job
- 20+ years of sealant experience
- Old sealant always removed completely
- 4.9 on Google from 180+ five-star reviews
Take a look at how sealant jobs are priced or what customers say.
How the visit works
A visit follows a simple pattern: we look at the joints together, protect the area around them, carry out the job and clear up. It generally takes a few hours for a handful of joints, longer for a whole elevation. A visit to Great Dunmow is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Mention any tricky access
- Clear items away from the joints we’re working on
- Tell us if parking is tricky
Ask for a quote
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Advice
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Check external joints each spring
- Point out the joints to other trades
- Keep movement joints as flexible joints, not mortar
- Deal with leaking gutters that soak the joints below
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage.
What external mastic looks like in Great Dunmow
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Parish Church of St Mary the Virgin, the joints between older walls, newer extensions and the roofline need a sealant that can move. Schools such as Dunmow St Mary's Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Great Dunmow is about 9 miles west of Braintree, in Essex. We carry out external mastic for homes and businesses in Great Dunmow, as part of our work across Essex. Our Essex coverage runs to 644 places, and Great Dunmow is one of them. Chelmsford is on our list too, around 11 miles away.
All of CM6 is within our area for external mastic. If you need external mastic at a property on Market Place, High Street and Station Road or a nearby road, our applicators can take on the job. You’ll find Great Dunmow on the B1008 and B1057, which makes it straightforward to reach. Close by, we work in Church End (1 mile north-east), Little Easton (2 miles north-west), Barnston (2 miles south-east), High Roding (3 miles south-west) and Great Canfield (3 miles south-west). Within a short drive, we also cover Chelmsford (11 miles south-east), Braintree (9 miles east), Harlow (13 miles south-west), Witham (13 miles south-east), Saffron Walden (11 miles north-west) and Halstead (13 miles east).
Local landmarks in Great Dunmow
In Great Dunmow, that means homes and buildings near Helena Romanes School and Sixth Form Centre and The Chequers Public House, among other places. For rail, the closest station is Stansted Airport station, about 4.3 miles west. Well-known places in the area include Little Easton Moat (1.6 miles north-west).
Great Dunmow: your questions answered
Do you cover smaller places like Great Dunmow?
Yes, Great Dunmow is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you do external mastic in Great Dunmow?
Yes. Our work covers London and the South East, and Great Dunmow is part of that. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we will send you a clear quote.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
How do you reach high-level joints?
It depends on the building. Send us photos and a rough idea of the height, and we’ll confirm what access is needed.
Do you have insurance?
Yes. We’re fully insured.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Do you remove the old sealant?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
Do I have to be there?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Honest limits
New sealant can’t fix everything, and we’ll tell you before we start. Sealant will not put right:
- Movement that’s more than a sealant joint can take
- Failed render or damaged cladding panels
- Rising or penetrating damp from elsewhere in the wall
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Surfaces we seal
- Façade panels
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
Different surfaces, different methods
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it. Send us any details you have about the façade.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
Quotes for external mastic in Great Dunmow
We quote each job individually. These are the things that affect it:
- Which sealant suits the joint
- Access and height
- Any mould that needs treating
- The size of the job
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
What we need to know
To help us quote quickly, please include:
- The address or postcode of the job
- If someone has resealed it before
- The problem you’ve noticed
- The rough size of the job
Want a quote for external mastic? Please phone 0345 464 0079 or drop us an email with a few details. We will explain what we’d do and send you a clear quote before work begins.