Essex · England
External Mastic in Bannister Green
Specialist external mastic for Bannister Green: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Gaps where render, brick and frames meet
- Water getting into walls through failed joints
- Rigid filler in a joint that should flex
The process
On the day, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work starts. The work usually takes a few hours to a few days, depending on the length of joint and the access. Somewhere as small as Bannister Green, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Mention if the joints have been sealed before
- Let us know if you’ve seen damp or leaks
How to get 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.
Advice
External mastic in Bannister Green, done properly
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We strip the joint back and start again. If you have rain getting behind render or cladding at a joint and sealant pulling away from one side of the joint, we can help, whatever the surface.
External sealant needs dry, clean surfaces, so work around Bannister Green is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Big or small, you get the same 12-month guarantee in Bannister Green and across Essex.
- Place
- Bannister Green (CM6)
- Region
- Essex
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Never let anyone fill a movement joint with mortar
- Check external joints each spring
- Deal with leaking gutters that soak the joints below
- Avoid pressure-washing directly into sealant joints
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint and spoil the finish.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
Common questions in Bannister Green
Do you work for landlords with property near Braintree station?
Yes. We work for landlords and letting agents as well as homeowners. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Is Bannister Green in your area for external mastic?
Yes, Bannister Green 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 price.
Is it OK to fill a movement joint with cement?
No, not where the gap is a movement joint. Pointing it stops it working, and the wall may crack nearby. We will reseal it with a flexible sealant.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What is backing rod for?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. Then the sealant bonds to two faces and can move.
Can you seal joints between render and window frames?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides with primer where required.
When will the joints need doing again?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and reseal when it splits.
What’s an expansion joint in brickwork?
Walls move with heat, cold and moisture, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
When to call us in Bannister Green
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
Common reasons people contact us include:
- Leaking joints around cladding and façade panels
- Plants rooting in failed movement joints
- Movement joints filled with mortar instead of sealant
- Joints with sealant missing in places
Letting a property close to Braintree station? Then split movement joints are easy to miss on a rental until damp shows inside.
Questions to ask before you book
- How long the guarantee is
- How the colour is chosen
- Is VAT in the price?
- Are they insured?
Walls and rooflines in Bannister Green
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Felsted Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Bannister Green is about 4 miles west of Braintree, in Essex. Jobs in Bannister Green get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. We cover 644 towns and villages across Essex, from the larger towns to small villages. For nearby work, see our Chelmsford page, about 9 miles away.
Here we cover the CM6 postcode area for external mastic. External mastic is available to properties on Stevens Lane, Cressages Close and Burnstie Road. Close by, we work in Watch House Green (1 mile north-west), Felsted (1 mile west), Causeway End (1 mile south-west), Blake End (1 mile north) and Willows Green (2 miles south-east). Further out, we also cover Chelmsford (9 miles south), Braintree (4 miles east), Maldon (13 miles south-east), Witham (8 miles south-east), Saffron Walden (15 miles north-west) and Halstead (9 miles north-east).
Near you in Bannister Green
Locally, jobs take us to homes and businesses close to The Three Horseshoes pub, among other places. Bannister Green’s nearest station is Braintree station, roughly 4.1 miles east. Other landmarks nearby include Braintree Community Hospital (3.5 miles north-east). The countryside around Bannister Green includes Phyllis Currie Nature Reserve.
How we quote for external mastic
We do not publish a price list, because no two jobs are the same. The quote depends on:
- Which sealant suits the joint
- How many areas need sealing
- Whether old sealant or filler has to be cut out
- How easy the joints are to reach
The cost reflects the work involved, not guesswork. That is why we ask a few questions first and agree the price before starting.
Helping us quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Whether it’s a home or a business
- What’s wrong with the joints now
- Where the property is
- Any access issues, like height or stairs
Want a quote for external mastic? Please phone 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Honest limits
In fairness, some problems need a different trade:
- Walls that need new movement joints cut into them
- Movement that is more than a sealant joint can take
- Cracks in the bricks or render themselves, away from the joints
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Joints and surfaces we work on
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Façade panels
What happens if it’s left?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost, so the damage spreads beyond the joint. Around Bannister Green, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
What you get with us
- Colour agreed with you before work begins
- Full insurance on every job
- Domestic, commercial and hotel work
- Tidy, careful work
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.