Greater London · England
Ruxley External Mastic
External mastic in Ruxley from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps where render, brick and frames meet
- Hard, crazed mastic that has stopped moving
- Joints pointed up with cement by mistake
External mastic for homes and businesses in Ruxley
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two. We work on concrete & block, copings & trims and render & cladding joints, and the jobs we see most are failed seals between different materials and failed sealant between panels on a façade.
Modern London flats rely on sealed movement joints and cladding joints. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall, and both kinds of building are found across London.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or drop us an email.
- Location
- Ruxley (DA14)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Ruxley questions
Do you work for landlords with property near Albany Park station?
Yes, we work for landlords and letting agents. 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 any work starts.
Is parking an issue for external mastic in Ruxley?
Parking in Ruxley, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. Then phone 0345 464 0079 or email us.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first.
Is the work guaranteed?
Yes: twelve months. If anything is not right with the work within the year, let us know and we will sort it.
Can you seal joints between two different 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.
Where do you work from?
We’re based in Crawley, and we work across South East England, London and Scotland.
Why is there a gap in my brick wall?
Walls move with heat, cold and moisture, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
How the job changes by surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Why deal with it now?
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and doesn’t last. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Ruxley.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
What you get with us
- Colour picked to suit the job
- Trusted Arbo and Everbuild sealants
- A choice of colours where the product allows
- Rated 4.9 stars on Google
Take a look at what affects the cost or customer reviews.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
What we do, step by step
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours for a handful of joints, longer for a whole elevation. In a London area like Ruxley, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Preparing for the visit
- Mention any parking rules near the property
- Clear items away from the joints we’re working on
- For indoor joints, keep the area dry beforehand if you can
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work and give you a clear quote.
Read more
What affects the quote in Ruxley
Every job gets its own quote. This is what makes a difference:
- Any working-time requirements on site
- Which sealant suits the joint
- Access and height
- The number of rooms or windows
What you pay reflects the work, not a rough estimate. That is why we ask about the job first.
Asking for a quote
To help us quote quickly, let us know:
- Photos by email, if that’s easy
- The problem you’ve noticed
- How we’d reach the joints
- Whether it has been sealed before
Want a quote for external mastic? Please phone 0345 464 0079 or drop us an email with a few details. We will explain what we’d do and give you a clear quote before any work starts.
What sealant work can’t fix
Before booking, it’s worth knowing the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Movement that’s more than a sealant joint can take
- Cracking across the wall rather than at a joint
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before booking.
What we seal
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Façade panels
Nearby places to Ruxley
What else we do in Ruxley
Landlords, agents and businesses in Ruxley
For anyone letting property in or around Ruxley, several properties can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
We work for letting agents and landlords as well as homeowners. Resealing between tenancies keeps a property looking cared for.
Walls and rooflines in Ruxley
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
Ruxley is in London, so parking needs planning: let us know about parking bays, permits or a driveway. Schools such as Hope Community School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. For an older house near a landmark such as St Botolph's Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
Ruxley is about 2 miles south-east of Sidcup, in Greater London. From the centre of Ruxley to the outskirts, we cover external mastic for every kind of property. Ruxley is one of 764 towns and villages in Greater London where we work. London is on our list too, around 11 miles away.
Here we cover the DA14 postcode area for external mastic. Close by, we work in Upper Ruxley (1 mile south-east), Foots Cray (1 mile west), Hockenden (1 mile south-east), North Cray (1 mile north) and Stonehill Green (1 mile east). Within a short drive, we also cover London (11 miles north-west), City of Westminster (14 miles north-west), Marylebone (14 miles north-west), St Pancras (13 miles north-west), Shoreditch (12 miles north-west) and Walthamstow (14 miles north-west).
Near you in Ruxley
Typical jobs here are in homes near Kemnal Technology College, Foots Cray Meadows and Walsingham School, among other places. Ruxley’s nearest station is Albany Park station, roughly 1.5 miles north of the centre. Nearby you will also find Metropolitan Police Museum (1.8 miles north-west) and Eynsford Castle (4.6 miles south-east). For a walk, there’s The Warren and Summer Hill.