Essex · England
External Mastic in Matching
Sealing brickwork movement joints, render, cladding and façade joints for Matching, backed by a one-year guarantee. Call for a quick quote.
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
- Joints pointed up with cement by mistake
External mastic in Matching, done properly
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. If you’re dealing with old sealant gone brittle and cracked and gaps where render, brick and frames meet, we can put it right.
External sealant needs dry, clean surfaces, so work around Matching is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
Our work is backed for twelve months.
- Place
- Matching (CM17)
- Region
- Essex
- Cover
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Signs you need external mastic in Matching
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
Look out for any of the following:
- Joints with sealant missing in places
- Sealant that has lost its bond to the brick or render
- Failed sealant between panels on a façade
- Failed seals between different materials
For landlords with property near Sawbridgeworth station, outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- Who turns up on the day
- How the surfaces are prepared before sealing
- What the quote includes, VAT included or not
- How hidden problems are handled
Outside joints around Matching
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Barrington Hall (about 4.1 miles north-east) are a reminder that the area around Matching has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Homes close to Parish Church of St Mary include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Matching is about 4 miles east of Harlow, in Essex. Homes, rented property, offices and hotels in Matching is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 644 places across Essex, from the larger towns to small villages. You can also see our page for Chelmsford, about 13 miles away.
Every address in CM17 is within our area for external mastic. Neighbouring places we cover for external mastic include Newman's End (1 mile north), Matching Tye (1 mile south-west), Housham Tye (1 mile south-west), Loyter's Green (1 mile south) and Magdalen Laver (2 miles south). Within a short drive, we also cover Chelmsford (13 miles east), Harlow (4 miles west), Brentwood (12 miles south), Billericay (15 miles south-east), Loughton (11 miles south-west) and Waltham Abbey (11 miles south-west).
Local landmarks in Matching
For rail, the closest station is Sawbridgeworth station, about 2.6 miles north-west of the centre. Well-known places in the area include Mark Hall Cycle Museum (3.2 miles west) and Princess Alexandra Hospital (4.9 miles west). Green spaces nearby include Sawbridgeworth Marsh.
How we quote for external mastic
For a quick quote, just ask. The main things that affect it are:
- The size of the job
- Which sealant suits the joint
- When we can work, for business premises
- How many rooms, windows or areas are involved
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Whether it has been sealed before
- Pictures of the joints, sent by email
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
We quote each job on its own, so the first step is telling us about yours. Simply phone 0345 464 0079 or email us and describe the job.
Towns and villages near Matching
Also in Matching
What the job involves on each surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.
Landlord and commercial work in Matching
If you manage several properties in or around Matching, several properties can go on one quote. Just tell us the addresses and what each one needs.
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 that we can handle for you.
What happens on the day
We keep the work tidy and contained to the joints we’re treating, so you can carry on as normal. The job generally takes anything from a few hours to several days, depending on the building, and we tell you how long to leave it before we go. For a village or hamlet like Matching, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Let us know about stairs, lifts or work at height
- Tell us about any previous sealing or DIY attempts
- Keep children and pets away from the work area
Get a quote
Need a quote? Please phone 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and give you a clear quote before work begins.
Related advice
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Check external joints each spring
- Wash walls gently around the sealant
- Deal with leaking gutters that soak the joints below
- Never let anyone fill a movement joint with mortar
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Matching questions
I let a flat near Sawbridgeworth station. Can you help?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Can you do external mastic in Matching?
Yes. Our work covers London and the South East, and Matching is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
What does external mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we will talk you through it.
What’s an expansion joint in brickwork?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Where is Mr Mastic based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done.
Do I have to be there?
Access is agreed with you when the job is booked. Indoors, that normally means someone at home.