Essex · England
External & façade joints in Birch Green, Essex
External mastic across Birch Green and nearby, with old sealant always removed completely and a 12-month guarantee.
- Movement joints filled with mortar instead of sealant
- Movement joints with cracked, split or missing sealant
- Gaps where render, brick and frames meet
External mastic in Birch Green, done properly
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. If you’re dealing with weathered mastic that no longer stretches and sealant pulling away from one side of the joint, we can put it right, on joints between brick and frames, render & cladding joints and façade panels alike.
External sealant needs dry, clean surfaces, so work around Birch Green is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
All our work is covered by a one-year guarantee.
- Location
- Birch Green (CO2)
- Wider area
- Essex
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Leave it or put it right?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. Around Birch Green, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
Why book with us
- ARBOMaster approved applicator
- Colour agreed with you before work begins
- White, clear, grey or another colour, product permitting
- Experience in homes, commercial sites and hotels
Birch Green: your questions answered
Can you do external mastic in Birch Green?
Yes. Our work covers London and the South East, and Birch Green is part of that. You can call 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear price.
I let a flat near Marks Tey station. Can you help?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Do you use backing rod?
We fit closed-cell backing rod wherever the joint depth needs controlling. It controls the depth and stops the sealant bonding to the back.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Should I point up the gap in my brickwork?
No. Rigid materials can’t move with the wall. If it has already been filled, we can normally cut it out and reseal it.
What do you need from me for a quote?
The location, the problem and the rough size of the job. Photos by email help too.
Do you seal joints where cladding meets other materials?
Yes. Joints between dissimilar materials are a big part of external work. We use a flexible sealant suited to both surfaces with primer where required.
What does external mastic cost?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or send us an email with a short description of the job.
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the building. In a small place like Birch Green, access is normally 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.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Let us know about stairs, lifts or work at height
- Move anything stored near the joints
- Keep pets and children clear of the area while we work
How to get a quote
Need a quote? Please ring 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.
Advice
Also near Birch Green
More services for Birch Green
How we quote for external mastic
Jobs vary more than people expect. The main factors:
- The type of sealant required
- How easy the joints are to reach
- When we can work, for business premises
- Whether there’s mould to deal with
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
To help us quote quickly, please include:
- Where the property is
- A few pictures by email, if you can
- What’s wrong with the joints now
- The rough size of the job
We quote each job on its own. Simply phone 0345 464 0079 or email us and describe the job.
Surface by surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so neither cracks the other.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it and keep the sealant to the right depth.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
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.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Keep water from gutters off the wall
- Ask before painting over external sealant
- Clear growth from the base of walls and joints
- Keep movement joints as flexible joints, not mortar
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established.
Signs you need external mastic in Birch Green
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
Most people get in touch after spotting one of these:
- Gaps where render, brick and frames meet
- Hard, crazed mastic that has stopped moving
- Movement joints with cracked, split or missing sealant
- Movement joints filled with mortar instead of sealant
For an older house near a landmark such as St Mary's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Comparing quotes
- What happens if the job turns out different
- Whether VAT is included
- Is the old sealant removed completely?
- Who does the work, and how experienced they are
Walls and rooflines in Birch Green
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 Layer Marney Tower (about 1.4 miles south-west) nearby, there’s older building stock in the area around Birch Green 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.
If you let a flat or house near Marks Tey station, split movement joints are easy to miss on a rental until damp shows inside. Schools such as Birch Church of England Voluntary Aided Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Birch Green is about 5 miles south-west of Colchester, in Essex. Across the CO2 area, we can carry out external mastic at your property. Birch Green is one of 644 towns and villages in Essex we cover for external mastic. Our Chelmsford page covers work nearby.
Our applicators cover all of CO2 for external mastic. You’ll find streets such as Luard Way, Birch Street and Hollingtons Grove. Nearby, we also carry out external mastic in Birch (1 mile north), Layer Breton (1 mile south), Heckfordbridge (2 miles north), Layer-de-la-Haye (2 miles east) and Copford Green (2 miles north). Within a short drive, we also cover Colchester (5 miles north-east), Braintree (11 miles west), Clacton-on-Sea (14 miles east), Maldon (10 miles south-west), Witham (8 miles west) and Camulodunum (4 miles north-east).
Around Birch Green
Locally, jobs take us to homes and businesses close to Hare And Hounds Public House and the streets around them. The closest station to Birch Green is Marks Tey station, about 3.4 miles north-west. Well-known places in the area include Anchor Press Museum (3.2 miles south-west) and Essex County Hospital (4.6 miles north-east). Open spaces near Birch Green include Abberton Reservoir.