Essex · England
Gallows Green External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Gallows Green and across Essex. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Joints pointed up with cement by mistake
- Joints with sealant missing in places
- Hard, crazed mastic that has stopped moving
External mastic in Gallows Green, done properly
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. We work on render & cladding joints, brickwork movement joints and façade panels, and common reasons people get in touch are sealant that has lost its bond to the brick or render and hard, crazed mastic that has stopped moving.
Outside joints can only be sealed when they’re dry, so work in Gallows Green is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Gallows Green (CO6)
- Wider area
- Essex
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Cracked brickwork or render that needs a builder or plasterer
- Subsidence or other structural problems
- Loose or hollow render, which needs re-rendering
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Façade panels
The process
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from a few hours to several days, depending on the building. Somewhere as small as Gallows Green, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- 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.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Getting ready for the visit
- Tell us if parking is tricky
- For indoor joints, keep the area dry beforehand if you can
- Move anything stored near the joints
Getting a quote
Want a quote for external mastic? Please call 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.
Advice
Different surfaces, different methods
Concrete and blockwork
The face of concrete or block is often dusty, so preparation is key. A primer goes on where the product requires one.
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and protects the render itself.
Gallows Green buildings and the weather
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Holy Trinity CofE Primary School? Then its movement joints, gutters and trims need looking after like any other building’s. Rented homes near Marks Tey station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. For an older house near a landmark such as Church of St Margaret and St Catherine, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Gallows Green is about 4 miles west of Colchester, in Essex. Jobs in Gallows Green get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Across Essex, we cover 644 places, and Gallows Green is one of them. You can also see our page for Chelmsford, about 18 miles away.
Postcode districts we cover here for external mastic: CO6. Local streets include Foxes Lane and Halstead Road, all of which we cover. If you’re just outside Gallows Green, we cover Fordham Heath (1 mile east), Fordham (1 mile north), West Bergholt (2 miles east), Wormingford (3 miles north) and Great Horkesley (4 miles north-east). We also work in nearby towns such as Colchester (4 miles east), Braintree (10 miles west), Maldon (13 miles south-west), Witham (10 miles south-west), Camulodunum (3 miles south-east) and Halstead (7 miles west).
Near you in Gallows Green
Around Gallows Green, our work takes us to homes and buildings near The Stanway School and The Queen's Head Public House, among other places. The nearest railway station is Marks Tey station, roughly 1.7 miles south-west. A little further out are Birch Castle (4.1 miles south) and Essex County Hospital (3.9 miles east). Open spaces near Gallows Green include Iron Latch.
Looking after it afterwards
So the new joints stay in good condition:
- Clear growth from the base of walls and joints
- Deal with leaking gutters that soak the joints below
- Check the sealant is paintable before painting near it
- Keep movement joints as flexible joints, not mortar
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
Act while the splits are small. At that stage it’s a simple cut out and reseal before water has had years to get in.
What affects the cost of external mastic
We quote each job individually. This is what makes a difference:
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- How easy the joints are to reach
Combining jobs into one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Helping us quote
When you call or email, these details help:
- Photos by email, if that is easy
- Whether it’s a home or a business
- What the problem is, such as mould, gaps, leaks or cracking
- Where the property is
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, phone 0345 464 0079 or send us an email.
For landlords and businesses
We also work for property managers and facilities teams. Several sites can be quoted together.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can go on one quote.
Why deal with it now?
Running new sealant over the old bead rarely lasts. New sealant does not bond well to old, weathered sealant, so the old joint is cut out fully first. In a small place like Gallows Green, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
What you get with us
- More than 20 years in sealant work
- 180+ five-star Google reviews
- Colour agreed with you before any work starts
- Old sealant always removed completely
See our cost guide or what customers say.
Your questions about external mastic in Gallows Green
Is Gallows Green within the area you cover?
Yes. Gallows Green is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Marks Tey station?
Yes. We work for letting agents and landlords as well as householders. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can you seal joints between two different materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. The sealant is matched to both sides.
How do I get a quote for external mastic in Gallows Green?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or drop us an email with a short description of the job.
Can a movement joint be filled with mortar?
No. A mortar-filled joint cannot move, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Will the new joint stand out?
The sealant colour is picked to suit the wall. Exterior sealants come in a good range of colours.