Essex · England
External Mastic in Birch
Sealing brickwork movement joints, render, cladding and façade joints for Birch, backed by a 12-month guarantee. Ask us for a quote.
- Leaking joints around cladding and façade panels
- Plants rooting in failed movement joints
- Rigid filler in a joint that should flex
How we handle external mastic in Birch
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. We work on joints between brick and frames, copings & trims and render & cladding joints, and people most often call us about joints pointed up with cement by mistake and old sealant gone brittle and cracked.
Older homes in small places like Birch may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water generally gets in, and they need the right sealant at the right depth.
Our work is backed for twelve months, in Birch and everywhere else we cover.
- Where
- Birch (CO2)
- Wider area
- Essex
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlord and commercial work in Birch
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Also near Birch
More services for Birch
What affects the quote in Birch
The quote reflects the job in front of us. We take into account:
- The number and length of the joints
- When we can work, for business premises
- How many rooms, windows or areas are involved
- Whether there’s mould to deal with
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference.
What we need to know
When you contact us, it’s useful to know:
- A few pictures by email, if you can
- Roughly how big the job is
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
If you’re in Birch and need external mastic, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
The process
The work is kept neat and contained to the area we are working on, so you can carry on as normal. The job generally takes anything from a few hours to several days, depending on the building, and we tell you how long to leave it before we go. In a small place like Birch, access is usually the main thing to plan. 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.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Mention if the joints have been sealed before
- Mention any tricky access
Get a quote
Want a quote for external mastic? Please ring 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
Why act early in Birch
Resealing a run of joints in one go is normally better than patching one at a time. Joints of the same age tend to fail together, and access only has to be arranged once. Around Birch, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Why us?
- Colour picked to suit the job
- Quality sealants from Arbo and Everbuild
- You choose the colour before work begins
- Any old sealant cut out fully, not covered over
Take a look at how sealant jobs are priced and what customers say.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
External mastic in Birch: local notes
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. Historic houses like Layer Marney Tower (about 1.7 miles south-west) are a reminder that the area around Birch has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Letting a property close to Marks Tey station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. 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 is about 5 miles south-west of Colchester, in Essex. From the centre of Birch to the outskirts, we cover external mastic for every kind of property. We cover 644 towns and villages across Essex. Chelmsford is on our list too, about 16 miles from Birch.
All of CO2 is within our area for external mastic, from the main roads to the quietest streets. Neighbouring places we cover for external mastic include Birch Green (1 mile south), Layer Breton (1 mile south), Heckfordbridge (1 mile north), Layer-de-la-Haye (2 miles east) and Copford Green (2 miles north-west). 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).
Landmarks near Birch
We work in homes and buildings around Hare And Hounds Public House, among other places. The nearest railway station is Marks Tey station, about 3 miles north-west. Other landmarks nearby include Birch Castle (less than half a mile south-east) and Anchor Press Museum (3.5 miles south-west). Green spaces nearby include Roman River Valley.
Birch: your questions answered
Will you come out to Birch?
Yes, Birch is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
I let a flat near Marks Tey station. Can you help?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before we start.
What is backing rod for?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Can you seal joints between two different materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides, primed where needed.
Do you guarantee your work?
Yes. All our work carries our 12-month guarantee.
What colours does the sealant come in?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We choose the closest to your brick or render so it doesn’t stand out.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Avoid pressure-washing directly into sealant joints
- Deal with leaking gutters that soak the joints below
- Have failed joints looked at early
- Keep movement joints as flexible joints, not mortar
Only paint over the joint if we have confirmed the sealant can take paint. Paint can crack on a flexible joint.
Act while the splits are small. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
Common problems we fix in Birch
If plants are growing out of a joint, the sealant has usually failed or was never there. Dirt and roots then trap moisture in the joint.
People normally contact us when they notice something like this:
- Rigid filler in a joint that should flex
- Hard, crazed mastic that has stopped moving
- Plants rooting in failed movement joints
- Sealant pulling away from one side of the joint
In the older streets around Church of St Peter and St Paul, an extension built onto an older house moves differently, and the joint between them takes the strain.
Comparing quotes
- How the joint is cleaned and prepared
- Whether the sealant suits the joint
- Whether you can choose the colour
- The length of the guarantee