Essex · England
External Mastic in Childerditch
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Childerditch. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Damp patches traced to an open external joint
- Joints pointed up with cement by mistake
- Joints where the bead has come unstuck
Should I try it myself first?
If you are 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.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
External mastic in Childerditch, done properly
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, so once it splits or hardens, the joint stops working and water gets in. We work on joints between brick and frames, brickwork movement joints and render & cladding joints, and the jobs we see most are hard, crazed mastic that has stopped moving and weeds or debris growing in open joints.
Outside joints can only be sealed when they’re dry, so work in Childerditch is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
The work is covered for a year after we finish. If anything is not right with it, call 0345 464 0079 or email us.
- Where
- Childerditch (CM13)
- Wider area
- Essex
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What we’re called out for in Childerditch
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and rips as the joint opens.
Any of these means the joints need attention:
- Brick movement joints where the sealant has split
- Failed seals between different materials
- Leaking joints around cladding and façade panels
- Plants rooting in failed movement joints
Managing a site like Woodlands School Great Warley? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- Whether the sealant suits the joint
- What insurance they hold
- Who turns up on the day
- Whether they seal over old material or remove it
What sealant work can’t fix
In fairness, there are a few things sealant won’t fix:
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
- Damp that is not coming from the joint
If you’re not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
Joints and surfaces we work on
- Copings & trims
- Joints between brick and frames
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Concrete & block
Towns and villages near Childerditch
Also in Childerditch
Different surfaces, different methods
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. They’re resealed over backing rod with a low-modulus sealant in a colour to suit the brick.
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the building. In a small place like Childerditch, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
Get a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will talk you through the work and give you a clear quote.
Related advice
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Point out the joints to other trades
- Keep soil, plants and ivy away from the joints
- Keep high-pressure jets off the joints
- Keep water from gutters off the wall
Do not paint over the new sealant unless we’ve said the product is paintable. Many exterior sealants are not designed to be painted, and paint can crack as the joint moves.
A joint that has stopped moving pushes the movement elsewhere, usually as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Landlords, agents and businesses in Childerditch
If you manage several properties in or around Childerditch, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Common questions in Childerditch
Will you come out to Childerditch?
Yes, Childerditch 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.
Can you help a landlord with a rental near West Horndon station?
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 give you a clear price.
Is there a guarantee?
Yes. There’s a 12-month guarantee on every job, large or small.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render.
Is there any odour?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
Can you reach joints on upper floors?
It depends on the building. Send us pictures and a rough idea of the height.
What is a movement joint?
Walls move with heat, cold and moisture, so long walls have planned gaps to take that movement. The gap is sealed with a flexible sealant over backing rod.
Childerditch buildings and the weather
With historic houses such as Hare Hall (about 4.8 miles west) nearby, there’s older building stock in the area around Childerditch 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. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as All Saints and St Faith, the joints between older walls, newer extensions and the roofline need a sealant that can move. Letting a property close to West Horndon station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Childerditch is about 3 miles south of Brentwood, in Essex. Anywhere in CM13, we cover external mastic for homes and businesses. Across Essex, we cover 644 places, and Childerditch is one of them. Our Chelmsford page covers work nearby, about 13 miles away.
We cover every part of CM13 for external mastic. Neighbouring places we cover for external mastic include Little Warley (1 mile south-west), West Horndon (1 mile south-east), East Horndon (2 miles east), Herongate (2 miles north-east) and Bulphan (3 miles south-east). Within a short drive, we also cover Chelmsford (13 miles north-east), Basildon (6 miles east), Brentwood (3 miles north), Canvey Island (12 miles east), Billericay (5 miles north-east) and Rayleigh (12 miles east).
Landmarks near Childerditch
In Childerditch, that means homes and buildings near Brentwood County High School and Greyhound Public House and the streets around them. The nearest railway station is West Horndon station, roughly 1.3 miles south-east. Nearby you’ll also find Upminster Tithe Barn Museum of Nostalgia (3 miles west) and Spire Hartswood Hospital (1.8 miles north-west). Not far away are Thorndon Park.