Essex · England
Matching Green External Mastic
Problem with your movement joints in Matching Green? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Joints pointed up with cement by mistake
- Cracked joints where brick meets render or frames
- Joints where the bead has come unstuck
External mastic in Matching Green, done properly
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. We work on render & cladding joints, façade panels and brickwork movement joints, and people most often call us about old sealant gone brittle and cracked and water getting into walls through failed joints.
Around Matching Green, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Our work is backed for twelve months.
- Where
- Matching Green (CM17)
- Wider area
- Essex
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What we’re called out for in Matching Green
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
Signs it’s time to call us include:
- Joints pointed up with cement by mistake
- Panel joints letting water in
- Sealant that has lost its bond to the brick or render
- 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
- When the joint can take water or movement
- Who does the work, and how experienced they are
- How the surfaces are prepared before sealing
- Is the old sealant removed completely?
FAQs for Matching Green
Do you work for landlords with property near Sawbridgeworth station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Is Matching Green within the area you cover?
Yes, we do. 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.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces, primed where needed.
How long should I leave it?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used before we leave.
Will the new joint stand out?
We choose a sealant colour to suit the brick, stone or render. There’s a wide choice of exterior colours.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Matching Green.
How long does external mastic take?
Typically it takes anything from a few hours to several days, depending on the building. Larger jobs naturally take longer, and we’ll say how long yours will take.
How the visit works
At the end, we look at the finished work together. The visit itself usually takes a few hours for a handful of joints, longer for a whole elevation, depending on the amount of work. Somewhere as small as Matching Green, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- Old sealant and any debris are cut and raked out.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- For business premises, tell us about site rules or sign-in
- Mention if the joints have been sealed before
Get a quote
Need a quote? Please ring 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Matching Green buildings and the weather
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Barrington Hall (about 4.1 miles north) nearby, there’s older building stock in the area around Matching Green as well as newer homes. 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 the joints between older walls, newer extensions and the roofline need a sealant that can move.
Matching Green is about 5 miles east of Harlow, in Essex. We provide external mastic to homes and businesses in Matching Green, as part of our work across Essex. Across Essex, we cover 644 places, and Matching Green is one of them. You can also see our page for Chelmsford, roughly 11 miles from Matching Green.
Work in CM17 works the same way as everywhere else we cover. You will find streets such as Downhall Road, Potash Road and Colvers, and we cover them all. We also cover the places around Matching Green: Manwood Green (1 mile north-east), Little Laver (1 mile south-east), White Roding (2 miles north-east), Abbess Roding (2 miles east) and Moreton (3 miles south). Larger places within reach include Chelmsford (11 miles east), Harlow (5 miles west), Brentwood (11 miles south), Billericay (13 miles south-east), Loughton (11 miles south-west) and Waltham Abbey (11 miles south-west).
Around Matching Green
Matching Green’s nearest station is Sawbridgeworth station, about 3.8 miles north-west of the centre. Well-known places in the area include Harlow Mill (4.3 miles west) and Princess Alexandra Hospital (6 miles west). For a walk, there’s Sawbridgeworth Marsh.
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
What affects the cost of external mastic
The price is agreed before any work begins. It takes into account:
- Whether the work is at height
- Which sealant suits the joint
- Working hours on commercial sites
- Any mould that needs treating
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Helping us quote
There’s no need for technical detail. Just tell us:
- Where the job is, and your postcode
- If someone has resealed it before
- Any access issues, like height or stairs
- What’s wrong with the joints now
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved.
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What sealant work cannot fix
Sealant isn’t the answer to every problem, and we will tell you before any work starts. It will not solve:
- Damp that is not coming from the joint
- Walls that need new movement joints cut into them
- Loose or hollow render, which needs re-rendering
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think before booking.
Where we work in Matching Green
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Concrete & block
- Joints between brick and frames
- Copings & trims
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 around the joint, so the problem grows beyond the joint itself. Where a wall is exposed, as many are in small places like Matching Green, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why book with us
- Experience in homes, commercial sites and hotels
- Over 20 years’ experience
- An ARBOMaster approved applicator
- Colour agreed with you before work begins
See how sealant jobs are priced and our reviews.
How to look after the new joints
To keep the joints looking good and working properly:
- Check external joints each spring
- Act on the first splits you see
- Keep water from gutters off the wall
- Ask before painting over external sealant
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.