Essex · England
External Mastic in Shelley
External mastic across Shelley and nearby, with old sealant always removed completely and a one-year guarantee.
- Joints with sealant missing in places
- Failed seals between different materials
- Panel joints letting water in
How we handle external mastic in Shelley
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the joint doesn’t stand out. We work on copings & trims, brickwork movement joints and façade panels, and the jobs we see most are plants rooting in failed movement joints and sealant that has lost its bond to the brick or render.
In a village or hamlet like Shelley, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
Our work is backed for twelve months, in Shelley and everywhere else we cover.
- Where
- Shelley (CM5)
- Region
- Essex
- Cover
- 12 months on all our work
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the cost of external mastic
We quote each job individually. These are the things that affect it:
- Working hours on commercial sites
- How many areas need sealing
- Access and height
- How much there is to do
What you pay reflects the work, not a rough estimate. That is why we ask about the job first.
What to tell us for a quote
To help us quote quickly, let us know:
- A few photos by email, if you can
- Any access issues, like height or stairs
- What’s wrong with the joints now
- Whether it has been sealed before
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or drop us an email.
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Keep water from gutters off the wall
- Keep high-pressure jets off the joints
- Never let anyone fill a movement joint with mortar
- Check external joints each spring
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead over time.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal before water has had years to get in.
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Outside joints around Shelley
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Hill Hall (about 4.8 miles south-west) nearby, there’s older building stock in the area around Shelley as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Managing a site like Ongar Primary School? Then its movement joints, gutters and trims need looking after like any other building’s. For an older house near a landmark such as Church of St Peter, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Shelley is about 7 miles south-east of Harlow, in Essex. If you need external mastic in Shelley, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We cover Essex from our Crawley base, Shelley included. Shelley is one of 644 places in Essex we cover. There’s also a page for Chelmsford, about 11 miles away.
Every address in CM5 is within our area for external mastic. Whether your property is on St Peter's Avenue, Bewlay Close and Queensway or anywhere close by, our applicators can take on the job. Neighbouring places we cover for external mastic include Chipping Ongar (1 mile south), Greensted (1 mile south-west), High Ongar (1 mile south-east), Bobbingworth (1 mile north-west) and Greensted Green (2 miles west). Within a short drive, we also cover Chelmsford (11 miles east), Basildon (14 miles south-east), Harlow (7 miles north-west), Brentwood (7 miles south-east), Billericay (10 miles south-east) and Loughton (9 miles south-west).
Around Shelley
In Shelley, that means homes and buildings near The Ongar Academy and The Cock Tavern, among other places. Well-known places in the area include Willingale Doe (4 miles north-east) and St. Margaret's Hospital (5.1 miles west). The countryside around Shelley includes Gernon Bushes.
Why deal with it now?
Sealing over the top of old mastic doesn’t hold for long. The new layer can’t bond properly to old, weathered material, so the old joint is cut out fully first. In a small place like Shelley, 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, 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.
Why us?
- 180+ five-star Google reviews
- A sealant colour to suit the surroundings
- Approved under the ARBOMaster scheme
- More than 20 years in sealant work
Read what affects the cost and what customers say.
Nearby places to Shelley
What else we do in Shelley
How it works
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Shelley needs a little journey planning: 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 look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Let us know about earlier repairs to the joints
- Let us know about parking restrictions
Get a quote
Getting a quote is simple: tell us what needs doing and where. Photos by email help us understand the job, and we will take it from there.
Related advice
Shelley: your questions answered
Do you cover smaller places like Shelley?
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.
Do you cover Shelley for external mastic?
Yes. Our work covers London and the South East, and Shelley is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Where is Mr Mastic based?
Our base is Crawley. We work across South East England, London and Scotland.
What colours does the sealant come in?
We aim for a joint that suits the wall rather than one that jumps out. We will talk through colour options before we start, matched as closely as the range allows.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose, and the wall may crack nearby. We will reseal it with a flexible sealant.
What should I tell you?
Let us know what needs doing and where, plus photos if you have them. If we need more, we will ask.
How much does external mastic cost in Shelley?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
What the job involves on each surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. 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. We reseal them with a sealant suited to the panel material.
Honest limits
Sealant isn’t the answer to every problem, and we will tell you before any work starts. Sealant won’t put right:
- Movement that’s more than a sealant joint can take
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Render that’s blown, hollow or coming away
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly before you book.
What we seal
- Façade panels
- Concrete & block
- Joints between brick and frames
- Copings & trims
- Render & cladding joints
- Brickwork movement joints