Essex · England
Barrow Hill External Mastic
External mastic for Barrow Hill, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
- Weeds or debris growing in open joints
Can I do it myself?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
External mastic for homes and businesses in Barrow Hill
For buildings in Barrow Hill, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. Common call-outs are for gaps where render, brick and frames meet and weeds or debris growing in open joints, across copings & trims, joints between brick and frames and render & cladding joints.
Older homes in small places like Barrow Hill may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
All our work is covered by our one-year guarantee, wherever you are in Essex.
- Where
- Barrow Hill (CO5)
- Region
- Essex
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How we quote for external mastic
There’s no set price list. The quote depends on:
- The type of sealant required
- Whether the work is at height
- How many areas need sealing
- How much old sealant there is and how hard it is to remove
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
What we need to know
You do not need to know the technical terms. It helps if you can tell us:
- Where the job is, and your postcode
- How many joints, rooms or windows are involved
- Photos by email, if that is easy
- Whether it’s a home or a business
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we will take it from there.
The process
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take a few hours for a handful of joints, longer for a whole elevation. In a small place like Barrow Hill, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Move anything stored near the joints
- Keep pets and children clear of the area while we work
How to get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, phone 0345 464 0079 or email us.
Related advice
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Aftercare tips
A little care helps the new joints last. We recommend:
- Have failed joints looked at early
- Tell anyone working on the walls about the movement joints
- Keep movement joints as flexible joints, not mortar
- Keep soil, plants and ivy away from the joints
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established.
Also near Barrow Hill
Also in Barrow Hill
Why act early in Barrow Hill
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together. Older cottages and farmhouses around Barrow Hill can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or drop us an email.
Why book with us
- Old sealant always removed completely
- White, clear, grey or coloured to suit, where the product allows
- Approved under the ARBOMaster scheme
- You choose the colour before work begins
Take a look at our cost guide and what customers say.
FAQs for Barrow Hill
Is external mastic in a coastal place like Barrow Hill any different?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are generally the first to need attention.
Do you work for landlords with property near Wivenhoe station?
Yes. We work for landlords and letting agents as well as householders. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Why do you put foam in the joint first?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Should I point up the gap in my brickwork?
No. A mortar-filled joint can’t move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
How long will you be here?
A typical job takes anything from a few hours to several days, depending on the building, including the preparation. We’ll confirm how long when we quote.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or send us an email.
Do you seal joints where cladding meets other materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. The colour is chosen to suit.
Different surfaces, different methods
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
What external mastic looks like in Barrow Hill
Barrow Hill is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces 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.
Rented homes near Wivenhoe station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. If you look after a building such as Mersea Island School, its movement joints, gutters and trims need looking after like any other building’s.
Barrow Hill is about 7 miles south of Colchester, in Essex. We carry out external mastic for homeowners, landlords and businesses in Barrow Hill. Our Essex coverage runs to 644 places, Barrow Hill among them. You can also see our page for Chelmsford, about 20 miles away.
Here we cover the CO5 postcode area for external mastic. External mastic is available to properties on East Mersea Road and Bower Hall Lane and the roads around them. We also cover the places around Barrow Hill: West Mersea (1 mile south-west), East Mersea (2 miles east), Peldon (3 miles north-west), Langenhoe (3 miles north) and Little Wigborough (3 miles west). Further out, we also cover Colchester (7 miles north), Clacton-on-Sea (9 miles east), Maldon (12 miles west), Witham (13 miles west), Camulodunum (7 miles north-west) and Heybridge (11 miles west).
Local landmarks in Barrow Hill
We work in homes and buildings around The Fox Inn, among other places. The nearest railway station is Wivenhoe station, roughly 4.7 miles north. Open spaces near Barrow Hill include Ray Island.