Essex · England
External & façade joints in Cannon's Green, Essex
Sealing brickwork movement joints, render, cladding and façade joints for Cannon's Green, backed by a one-year guarantee. Call for a quick quote.
- Joints where the bead has come unstuck
- Failed sealant between panels on a façade
- Moss and dirt in joints with no sealant left
External mastic in Cannon's Green
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the joint doesn’t stand out. If you have leaking joints around cladding and façade panels and joints pointed up with cement by mistake, we can put it right, on render & cladding joints, façade panels and copings & trims alike.
Older homes in small places like Cannon's Green may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water usually gets in.
A 12-month guarantee comes as standard.
- Place
- Cannon's Green (CM5)
- Wider area
- Essex
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
When it is not the sealant
We will not take on work that will not last, so these are the limits:
- Failed render or damaged cladding panels
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cutting new joints into brickwork, which is building work rather than sealant work
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
What we seal
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
- Façade panels
When to call us in Cannon's Green
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and speed up the damage.
Signs it’s time to call us include:
- Gaps where render, brick and frames meet
- Damp patches traced to an open external joint
- Rigid filler in a joint that should flex
- Joints with sealant missing in places
Managing a site like The Ongar Academy? Then its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- Who turns up on the day
- Which colour the sealant will be
- How the joint is cleaned and prepared
- Whether all the old sealant comes out first
What we do, step by step
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Cannon's Green, 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.
- 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.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
- Keep children and pets away from the work area
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Read more
Cannon's Green buildings and the weather
London and the South East are among 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 Church of St Nicholas, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Cannon's Green is about 7 miles east of Harlow, in Essex. We provide external mastic to homes and businesses in Cannon's Green and the surrounding area. Across Essex, we cover 644 places, Cannon's Green among them. There’s also a page for Chelmsford, roughly 9 miles from Cannon's Green.
Every address in CM5 is covered for external mastic, from the main roads to the quietest streets. Neighbouring places we cover for external mastic include Fyfield (1 mile north-west), Clatterford End (1 mile north-west), Norton Mandeville (1 mile south), Norwood End (1 mile north) and High Ongar (2 miles south). Further out, we also cover Chelmsford (9 miles east), Basildon (14 miles south-east), Harlow (7 miles west), Brentwood (7 miles south), Billericay (10 miles south-east) and Loughton (11 miles south-west).
What’s near Cannon's Green
Around Cannon's Green, our work takes us to homes and buildings near Queens Head Public House, among other places. Nearby you will also find Willingale Doe (2 miles north-east).
Quotes for external mastic in Cannon's Green
Jobs vary more than people expect. The main factors:
- Whether old sealant or filler has to be cut out
- How easy the joints are to reach
- Any mould that needs treating
- The number of rooms or windows
Leaving a failed joint generally makes the job bigger, not smaller. If you’re unsure, call 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
What to tell us for a quote
When you contact us, these details help:
- What’s wrong with the joints now
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
- The type of property
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or send us an email.
Nearby places to Cannon's Green
More services for Cannon's Green
Your questions about external mastic in Cannon's Green
Is there a guarantee on external mastic in Cannon's Green?
All our work, in Cannon's Green and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Can you do external mastic in Cannon's Green?
Yes, Cannon's Green is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job.
Will the old sealant be removed?
Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Where is Mr Mastic based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Should I point up the gap in my brickwork?
No. Cement or mortar can’t stretch, so the joint stops doing its job. If it has already been filled, we can usually cut it out and reseal it.
Do you have insurance?
Yes, we’re fully insured.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Can you quote for more than one area?
Yes. Just list everything you need.
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Walk round the building once a year and look at the joints
- Clear growth from the base of walls and joints
- Leave the joints unpainted unless we have said otherwise
- Wash walls gently around the sealant
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
What happens if it’s left?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render near the open joint, so the damage spreads beyond the joint. In a small place like Cannon's Green, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Ask us for a quote and we will explain what it covers.
Why book with us
- Neat joints and a tidy finish
- Any old sealant cut out fully, not covered over
- A 12-month guarantee on all work
- ARBOMaster approved applicator
Read our cost guide or customer reviews.