Surrey · England
External Mastic in Caterham
Our applicators work in Caterham on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Brick movement joints where the sealant has split
- Failed sealant between panels on a façade
- Moss and dirt in joints with no sealant left
External mastic in Caterham
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. We work on brickwork movement joints, render & cladding joints and concrete & block, and people most often call us about joints with sealant missing in places and sealant pulling away from one side of the joint.
Garage door frames, porches and roofline trims are all part of external work in a town like Caterham. Where two materials meet, they move differently, and the sealant has to allow for it.
We stand behind the work with a one-year guarantee.
- Place
- Caterham (CR3)
- Region
- Surrey
- Cover
- A year, on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Questions from Caterham
I let a flat near Caterham station. Can you help?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Is external mastic in Caterham guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Will it make a mess?
No. The area is protected while we work and cleaned up afterwards.
Can a movement joint be filled with mortar?
No. Rigid materials can’t move with the wall, so the joint stops doing its job. Where a joint has been mortared, it can often be raked out and sealed properly.
What’s an expansion joint in brickwork?
Brickwork, render and cladding all move a little, so long walls have planned gaps to take that movement. It’s closed with backing rod and a flexible sealant.
What colours does the sealant come in?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
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.
Nearby places to Caterham
What else we do in Caterham
The process
On the day, we look over the joints with you first, so you know exactly what we’re doing. We protect the surfaces around the joints before any work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. In Caterham, parking is rarely complicated, though it helps to know about driveways or restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
Get a quote
For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before we start.
Related advice
What we cannot put right
We’d rather tell you now than do work that will not last, so these are the limits:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Structural movement, which needs a surveyor or engineer
- Walls that need new movement joints cut into them
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
Joints and surfaces we work on
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Façade panels
- Copings & trims
- Joints between brick and frames
Different surfaces, different methods
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two so neither cracks the other.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. We reseal them with an exterior sealant suited to the material.
External mastic in Caterham: local notes
With historic houses such as Titsey Place (about 4.7 miles east) nearby, there’s older building stock in the area around Caterham as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Sacred Heart Church, an extension built onto an older house moves differently, and the joint between them takes the strain. For site and facilities teams at buildings such as Hillcroft Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. If you let a flat or house near Caterham station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Caterham is about 11 miles south-west of Orpington, in Surrey. Across the CR3 area, we can carry out external mastic at your property. 395 places in Surrey are on our list, large and small. Crawley is on our list too, about 13 miles from Caterham.
All of CR3 is within our area for external mastic. Whether your property is on High Street, London Road and Park Road or a nearby road, our applicators can take on the job. Main roads around Caterham include the B2030 and B2031, so getting to you is simple. Other places close to Caterham include Woldingham Garden Village (2 miles east), Tyler's Green (2 miles south-east), Woldingham (3 miles east), Godstone (3 miles south) and Church Town (3 miles south-east). Larger places within reach include Epsom (8 miles north-west), Horley (8 miles south-west), Redhill (5 miles south-west), Ewell (8 miles north-west), Reigate (6 miles south-west) and Walton-on-Thames (15 miles north-west).
Local landmarks in Caterham
Typical jobs here are in homes near Sunnydown School, The King And Queen Public House and de Stafford School and the streets around them. The closest station to Caterham is Caterham station, roughly 0.7 miles south-east of the centre. Well-known places in the area include Bletchingley Castle (3.4 miles south) and East Surrey Museum (0.6 miles south-east). Open spaces near Caterham include South London Downs National Nature Reserve and Mercers Lake.
Landlords, agents and businesses in Caterham
We also work for property managers and facilities teams. Several sites can be quoted together, and we’re fully insured for the work.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Act on the first splits you see
- Keep soil, plants and ivy away from the joints
- Point out the joints to other trades
- Avoid pressure-washing directly into sealant joints
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Small splits are the time to act. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
How we quote for external mastic
The price is agreed before any work begins. It’s based on:
- Any working-time requirements on site
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
- Which sealant suits the joint
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, ring 0345 464 0079 or email us for an honest opinion and a quote.
What we need to know
To make quoting easier, please include:
- Where the property is
- Any access issues, like height or stairs
- Roughly how big the job is
- Photos by email, if that’s easy
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, ring 0345 464 0079 or email us.