Essex · England
Dyer's End External Mastic
External mastic in Dyer's End from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Weathered mastic that no longer stretches
- Joints with sealant missing in places
- Moss and dirt in joints with no sealant left
External mastic for homes and businesses in Dyer's End
On houses, flats and commercial buildings across Dyer's End, we reseal joints in brickwork, render, cladding and façade panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. Typical jobs include joints with sealant missing in places and movement joints filled with mortar instead of sealant, across façade panels, joints between brick and frames and brickwork movement joints.
Somewhere as small as Dyer's End, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Whatever the size of the job, you get the same 12-month guarantee in Dyer's End and across Essex.
- Location
- Dyer's End (CO9)
- Region
- Essex
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Walls and rooflines in Dyer's End
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Hedingham Castle (about 4.4 miles south-east) are a reminder that the area around Dyer's End has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
In and around Dyer's End, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Dyer's End is in Essex. Across the CO9 area, we cover external mastic for homes and businesses. Our area takes in 644 places across Essex, from the larger towns to small villages. There’s also a page for Chelmsford, about 19 miles away.
All of CO9 is within our area for external mastic, from the main roads to the quietest streets. Nearby, we also carry out external mastic in Stambourne (1 mile north-west), Wesley End (1 mile north), Toppesfield (1 mile south-east), Ridgewell (2 miles north-east) and Oaker Hill (2 miles east). We also work in nearby towns such as Braintree (10 miles south), Saffron Walden (11 miles west), Halstead (8 miles south-east), Great Dunmow (12 miles south-west), Stansted Mountfitchet (15 miles south-west) and Great Notley (11 miles south).
Local landmarks in Dyer's End
Typical jobs here are in homes near The Red Lion Public House, among other places. Nearby you will also find Toppesfield Museum of The Working Horse (1.2 miles south-east) and Hedingham Castle (4.4 miles south-east).
How it works
The work is kept neat and contained to the joints we’re treating. The job usually takes anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. Somewhere as small as Dyer's End, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Mention any sign-in or site rules at work premises
- Let us know about earlier repairs to the joints
- Plan for the work area to be out of bounds to pets and children
How to get a quote
For a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before work begins.
Advice
FAQs for Dyer's End
Can you do external mastic in Dyer's End?
Yes, Dyer's End is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
Will you come out to Dyer's End?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
How often do external joints need resealing?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year and renew it when it starts to fail.
How long does the job take?
That depends on the amount of work, but most jobs take anything from a few hours to several days, depending on the building. We will tell you when we quote.
Why is there a gap in my brick wall?
Walls move with heat, cold and moisture, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
Should I point up the gap in my brickwork?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. It needs a flexible sealant over backing rod.
Can landlords and businesses book you?
Yes, often. Several properties can be quoted together, and between tenancies is a good time for the work.
What we’re called out for in Dyer's End
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
If you can see any of these, it’s time to have the joints looked at:
- Failed seals between different materials
- Plants rooting in failed movement joints
- Joints pointed up with cement by mistake
- Panel joints letting water in
Homes close to Parish Church of St Peter and St Thomas include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What your quote should include
- What the quote includes, VAT included or not
- What guarantee comes with the work
- Which sealant they’ll use, and why
- Is the old sealant removed completely?
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Keep movement joints as flexible joints, not mortar
- Avoid pressure-washing directly into sealant joints
- Tell anyone working on the walls about the movement joints
- Have failed joints looked at early
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
Why deal with it now?
Sealing over the top of old mastic doesn’t hold for long. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. Around Dyer's End, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why book with us
- Arbo and Everbuild products
- White, clear, grey or another colour, product permitting
- Approved under the ARBOMaster scheme
- Over 20 years’ experience
See what affects the cost and customer reviews.
What we cannot put right
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Movement that is more than a sealant joint can take
- Failed render or damaged cladding panels
- Cracking across the wall rather than at a joint
If you’re not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer.
Where we work in Dyer's End
- Concrete & block
- Copings & trims
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
How the job changes by surface
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best in all weathers.
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.