Essex · England
Harrowcross External Mastic
Movement joints in Harrowcross need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Hard, crazed mastic that has stopped moving
- Joints pointed up with cement by mistake
- Panel joints letting water in
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost around the joint, so the damage spreads beyond the joint. In a small place like Harrowcross, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why book with us
- We leave the area clean and tidy
- Homes, businesses and hotels
- Colour agreed with you before work begins
- Fully insured
Take a look at how sealant jobs are priced or our reviews.
External mastic for homes and businesses in Harrowcross
On houses, flats and commercial buildings across Harrowcross, we reseal joints in brickwork, render, cladding and façade panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. We work on render & cladding joints, concrete & block and façade panels, and people most often call us about joints pointed up with cement by mistake and water getting into walls through failed joints.
Around Harrowcross, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
A 12-month guarantee comes as standard, so you’re covered after we’ve gone.
- Location
- Harrowcross (CO9)
- Wider area
- Essex
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
When it is not the sealant
Before booking, it’s worth knowing the limits too:
- Walls that need new movement joints cut into them
- Rising or penetrating damp from elsewhere in the wall
- Loose or hollow render, which needs re-rendering
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before booking.
What we seal
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
- Concrete & block
- Façade panels
- Joints between brick and frames
What happens on the day
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes anything from a few hours to several days, depending on the building. For a village or hamlet like Harrowcross, the journey is planned in advance: let us know about lanes, gates and parking. 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.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Tell us if parking is tricky
- Tell us about access, such as stairs, a lift or high-level joints
- Clear items away from the joints we’re working on
Get 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.
Related advice
What affects the quote in Harrowcross
Jobs vary more than people expect. What affects the quote:
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
- How many rooms, windows or areas are involved
- Working hours on commercial sites
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The rough size of the job
- Any previous sealing or DIY work
- Pictures of the joints, sent by email
- The type of property
Every job is quoted individually, so the first step is telling us about yours. Simply phone 0345 464 0079 or send us an email and describe the job, and pictures are welcome.
How to look after the new joints
To keep the joints looking good and working properly:
- Walk round the building once a year and look at the joints
- Check the sealant is paintable before painting near it
- Act on the first splits you see
- Keep movement joints as flexible joints, not mortar
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
Harrowcross questions
Can you do external mastic in Harrowcross?
Yes, Harrowcross is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear quote.
Will you come out to Harrowcross?
Yes, Harrowcross is covered. 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.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
How much does external mastic cost in Harrowcross?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
How long before the joint can be used?
Different products cure at different speeds, so please follow the time we give you.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
How long does external mastic last?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges.
What information do you need?
A short description and the location, with pictures by email if possible. If we need more, we’ll ask.
Nearby places to Harrowcross
Also in Harrowcross
What external mastic looks like in Harrowcross
Rainfall in the South East is lower than in much 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 Hedingham Castle (about 1.7 miles north-east) nearby, there’s older building stock in the area around Harrowcross as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
For site and facilities teams at buildings such as Hedingham School and Sixth Form, its movement joints, gutters and trims need looking after like any other building’s.
Harrowcross is about 3 miles north-west of Halstead, in Essex. We carry out external mastic for householders, landlords and businesses in Harrowcross and the surrounding area, as part of our work across Essex. Our Essex coverage runs to 644 places, and Harrowcross is one of them. Chelmsford is on our list too, around 17 miles away.
Jobs for external mastic in CO9 works the same way as everywhere else we cover. Close by, we work in Sible Hedingham (1 mile north-east), Almshouse Green (1 mile west), Castle Hedingham (2 miles north-east), Gosfield (3 miles south) and Beazley End (4 miles south-west). Further out, we also cover Colchester (15 miles east), Braintree (6 miles south), Witham (12 miles south), Saffron Walden (15 miles west), Camulodunum (14 miles south-east) and Halstead (3 miles south-east).
Local landmarks in Harrowcross
Around Harrowcross, our work takes us to homes and buildings near The White Lion pub and the streets around them. Well-known places in the area include Hedingham Castle (1.7 miles north-east) and Halstead Hospital (3 miles south-east). For a walk, there’s Belcher's and Broadfield Woods.
What we’re called out for in Harrowcross
If plants are growing out of a joint, the sealant has normally failed or was never there. Roots and dirt hold water against the wall and speed up the damage.
If you can see any of these, it’s time to have the joints looked at:
- Failed sealant between panels on a façade
- Sealant pulling away from one side of the joint
- Failed seals between different materials
- Joints pointed up with cement by mistake
Homes close to Church of St Peter include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
What your quote should include
- Is the old sealant removed completely?
- What product goes in the joint
- Whether you can choose the colour
- What preparation is included
Landlords, agents and businesses in Harrowcross
We also work for property managers and facilities teams in Harrowcross and across Essex. Several sites can be quoted together, and we are fully insured.
For anyone letting property in or around Harrowcross, jobs at different addresses can be quoted together. Send us the addresses and the work at each.