Essex · England
Mundon External Mastic
External mastic for Mundon and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Rain getting behind render or cladding at a joint
- Gaps where render, brick and frames meet
- Joints pointed up with cement by mistake
External mastic in Mundon, done properly
For buildings in Mundon, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you’re dealing with joints where the bead has come unstuck and plants rooting in failed movement joints, we can help.
Somewhere as small as Mundon, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Mundon (CM9)
- Wider area
- Essex
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How the job changes by surface
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. They’re resealed over backing rod with a low-modulus sealant.
Also near Mundon
What else we do in Mundon
Honest limits
New sealant cannot fix everything, and we will tell you before any work starts. Sealant won’t put right:
- Damp that isn’t coming from the joint
- Cracking across the wall rather than at a joint
- Failed render or damaged cladding panels
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
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
The process
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the job takes a few hours to a few days, depending on the length of joint and the access for a typical job. Somewhere like Mundon needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by walking round the building and agreeing the joints and the access.
- 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.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- On commercial sites, let us know about site rules
- Move anything stored near the joints
Get a quote
We quote each job on its own, so start by telling us what you need. Just phone 0345 464 0079 or drop us an email with the details and send photos if you have them.
Advice
Questions from Mundon
Is Mundon within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Does the coastal weather in Mundon affect outside sealant?
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.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
How much does external mastic cost in Mundon?
It depends on the job, so we quote each one individually. To get one, call 0345 464 0079 or send us an email and let us know what needs doing and where.
What is backing rod for?
That’s backing rod, a closed-cell foam. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
Can you seal joints between render and window frames?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
What colours does the sealant come in?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best so the joint does not draw the eye.
What affects the cost of external mastic
We don’t publish a price list, because jobs vary so much. What we look at:
- How many areas need sealing
- Any working-time requirements on site
- The size of the job
- Access and height
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
Helping us quote
What to tell us when you ask for a quote:
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
- Photos by email, if that is easy
- If someone has resealed it before
If you’re in Mundon and need external mastic, call 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Do you need external mastic in Mundon?
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Common reasons people contact us are:
- Movement joints with cracked, split or missing sealant
- Sealant that has lost its bond to the brick or render
- Gaps where render, brick and frames meet
- Leaking joints around cladding and façade panels
If you live in an older home near St Mary's Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What your quote should include
- How long to leave it before use
- How long the guarantee is
- Which sealant they’ll use, and why
- Who does the work, and how experienced they are
Landlord and commercial work in Mundon
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Point out the joints to other trades
- Check external joints each spring
- Act on the first splits you see
- Check the sealant is paintable before painting near it
Don’t paint over the new sealant unless we have said the product is paintable. Many exterior sealants are not designed to be painted, and paint can crack as the joint moves.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.
What external mastic looks like in Mundon
Mundon 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. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For landlords with property near North Fambridge station, split movement joints are easy to miss on a rental until damp shows inside.
Mundon is about 3 miles south of Maldon, in Essex. Homes, rented property, offices and hotels in Mundon is covered for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Mundon is one of 644 places in Essex we cover for external mastic. Chelmsford is on our list too, around 10 miles away.
All of CM9 is covered for external mastic. You’ll find streets such as Main Road, Wood Lane and Parsonage Chase. Neighbouring places we cover for external mastic include Latchingdon (2 miles south-east), Maylandsea (2 miles east), Mayland (3 miles east), Althorne (3 miles south-east) and Ostend (5 miles south-east). We also work in nearby towns such as Chelmsford (10 miles west), Basildon (13 miles south-west), Braintree (15 miles north-west), Maldon (3 miles north), Canvey Island (13 miles south-west) and Billericay (13 miles west).
Around Mundon
We work in homes and buildings around The White Horse Public House, among other places. Mundon’s nearest station is North Fambridge station, roughly 3 miles south. For a walk, there’s Northey Island.