Essex · England
External Mastic in Lambourne
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Lambourne and across Essex. Fully insured, ARBOMaster approved and guaranteed for a year.
- Failed sealant between panels on a façade
- Damp patches traced to an open external joint
- Gaps where render, brick and frames meet
How we handle external mastic in Lambourne
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. We work on concrete & block, brickwork movement joints and render & cladding joints, and people most often call us about movement joints filled with mortar instead of sealant and water getting into walls through failed joints.
Around Lambourne, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Our work is backed for twelve months.
- Where
- Lambourne (RM4)
- Wider area
- Essex
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. In a small place like Lambourne, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
We don’t 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 and we’ll talk you through it.
Why Lambourne clients choose us
- 4.9 on Google from 180+ five-star reviews
- A 12-month guarantee on all work
- We’re fully insured
- Colour picked to suit the job
Read our cost guide and what customers say.
How to look after the new joints
A little care helps the new joints last. We recommend:
- Look over the joints every year, ideally after winter
- Fix overflowing gutters above sealed joints
- Show decorators and builders where the movement joints are
- Get split or bare joints resealed while the damage is small
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
What affects the quote in Lambourne
The quote reflects the job in front of us. We take into account:
- How many areas need sealing
- Whether there’s mould to deal with
- Access and height
- Any working-time requirements on site
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Helping us quote
There’s no need for technical detail. Just tell us:
- How we’d reach the joints
- What’s wrong with the joints now
- The rough size of the job
- Whether it’s a home or a business
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before work begins.
Lambourne: your questions answered
Is external mastic in Lambourne guaranteed?
All our work, in Lambourne and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Do you cover smaller places like Lambourne?
Yes, Lambourne 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.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
How long will you be here?
Most jobs take a few hours for a handful of joints, longer for a whole elevation, including the preparation. We will confirm how long when we quote.
What does external mastic cost?
Size, access and the old material all affect the cost. Call for a quick quote.
What’s an expansion joint in brickwork?
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.
Should I point up the gap in my brickwork?
No. A mortar-filled joint can’t move, so the wall cracks somewhere else instead. It needs a flexible sealant over backing rod.
Are you insured?
Yes, we’re fully insured for every job we do.
Landlords, agents and businesses in Lambourne
For anyone letting property in or around Lambourne, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
Signs you need external mastic in Lambourne
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. The joint cannot move, so the wall cracks somewhere else instead.
Most people get in touch after spotting something like this:
- Gaps where render, brick and frames meet
- Water getting into walls through failed joints
- Brick movement joints where the sealant has split
- Joints pointed up with cement by mistake
Schools such as Lambourne Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
What your quote should include
- How the surfaces are prepared before sealing
- What happens if they find a problem under the old sealant
- Which colour the sealant will be
- Whether they’re fully insured
How it works
We keep the work tidy 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. Somewhere like Lambourne needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Try not to wet indoor joints just before the visit
- Keep children and pets away from the work area
Getting a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved and give you a clear price.
Read more
When something else is needed
We’ll always be straight with you, so here’s what sealant can’t fix:
- Damp that is not coming from the joint
- Structural movement, which needs a surveyor or engineer
- Cracked brickwork or render that needs a builder or plasterer
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before you book.
What we seal
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Façade panels
- Copings & trims
Places near Lambourne
What else we do in Lambourne
Lambourne buildings and the weather
With historic houses such as Hill Hall (about 2.2 miles north) nearby, there’s older building stock in the area around Lambourne as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Parish Church of St Mary and All Saints, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Lambourne is about 3 miles east of Loughton, in Essex. Anywhere in RM4, we can carry out external mastic at your property. We cover 644 towns and villages across Essex, large and small. London is on our list too, about 14 miles from Lambourne.
Postcode districts we cover here for external mastic: RM4. If you’re just outside Lambourne, we cover Abridge (1 mile north-west), Lambourne End (1 mile south), Stapleford Abbotts (2 miles south-east), Theydon Garnon (2 miles north) and Hobbs Cross (2 miles north). Larger places within reach include Basildon (15 miles east), Harlow (9 miles north), Brentwood (7 miles east), Billericay (12 miles east), Loughton (3 miles west) and Waltham Abbey (6 miles north-west).
What’s near Lambourne
Around Lambourne, our work takes us to homes and buildings near The Maltsters Arms Public House and Debden Park High School. Nearby you will also find Epping Signalling Museum (3.5 miles north) and Claybury Hospital (4 miles south-west). The countryside around Lambourne includes Hainault Lodge.