Greater London · England
Malden Rushett External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Malden Rushett, with a one-year guarantee on every job. Call for a quick quote.
- Movement joints with cracked, split or missing sealant
- Movement joints filled with mortar instead of sealant
- Moss and dirt in joints with no sealant left
External mastic in Malden Rushett
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 render & cladding joints, concrete & block and façade panels, and people most often call us about hard, crazed mastic that has stopped moving and joints with sealant missing in places.
Modern London flats rely on sealed movement joints and cladding joints. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Malden Rushett (KT9)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Do you need external mastic in Malden Rushett?
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
Look out for these signs:
- Failed sealant between panels on a façade
- Old sealant gone brittle and cracked
- Sealant pulling away from one side of the joint
- Rain getting behind render or cladding at a joint
Rented homes near Chessington South station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What to look for in a quote
- How long the guarantee is
- What product goes in the joint
- What happens if they find a problem under the old sealant
- Who turns up on the day
Other services in Malden Rushett
Different surfaces, different methods
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best in all weathers.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. We reseal their joints with backing rod and a flexible product.
What affects the cost of external mastic
Jobs vary more than people expect. The main factors:
- Any mould that needs treating
- The number of rooms or windows
- The size of the job
- Which sealant suits the joint
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What to tell us for a quote
When you contact us, it’s useful to know:
- Where the property is
- Photos by email, if that is easy
- What’s wrong with the joints now
- How many joints, rooms or windows are involved
We quote each job on its own. Just call 0345 464 0079 or email us with the details.
Can I do it myself?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Malden Rushett questions
I let a flat near Chessington South station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Can you do external mastic in Malden Rushett?
Yes. We work across London and the South East, and Malden Rushett is part of that. Just call 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.
How much does external mastic cost in Malden Rushett?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or send us an email with a short description of the job.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
How long will you be here?
It depends on the size of the job, but most jobs take anything from a few hours to several days, depending on the building. We’ll tell you when we quote.
What colours does the sealant come in?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin from the range available.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Keep movement joints as flexible joints, not mortar
- Avoid pressure-washing directly into sealant joints
- Don’t let climbing plants root in the sealant
- Get split or bare joints resealed while the damage is small
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Once a joint can’t move, the wall finds another way, normally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Why act early in Malden Rushett
A failed movement joint lets water into the wall and can run behind render or cladding. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why Malden Rushett clients choose us
- Any old sealant cut out fully, not covered over
- We leave the area clean and tidy
- Rated 4.9 stars on Google
- We agree the colour with you first
Take a look at our cost guide or our reviews.
Walls and rooflines in Malden Rushett
In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts. Historic houses like Fitznells Manor (about 3.1 miles east) are a reminder that the area around Malden Rushett 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.
As a London address, Malden Rushett can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Historic houses such as Fitznells Manor, about 3.1 miles east, show how far back building around Malden Rushett goes.
Malden Rushett is about 2 miles north of Ashtead, in Greater London. Malden Rushett gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 764 towns and villages across Greater London, from the larger towns to small villages. London is on our list too, about 15 miles from Malden Rushett.
Our applicators cover all of the KT9 postcode area for external mastic and the streets around it. Whether your property is on Silverglade, Leatherhead Road and West Road or anywhere close by, our applicators can take on the job. We also cover Barwell (1 mile north), Pachesham Park (1 mile south-west), Claygate (2 miles north-west), Oxshott (2 miles west) and Ashtead (2 miles south). Further out, we also cover London (15 miles north-east), City of Westminster (14 miles north-east), Marylebone (14 miles north-east), Kensington (12 miles north-east), Brompton (13 miles north-east) and Stockwell (12 miles north-east).
Landmarks near Malden Rushett
Around Malden Rushett, our work takes us to homes and buildings near Claygate Common, among other places. For rail, the closest station is Chessington South station, about 1.3 miles north of the centre. Other landmarks nearby include Epsom Cottage Hospital (0.8 miles east) and The Ashley Centre (2.2 miles east). The countryside around Malden Rushett includes The Lake and Jubilee Wood.
How it works
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes a few hours for a handful of joints, longer for a whole elevation from start to finish. In a London area like Malden Rushett, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- Move anything stored near the joints
- Let us know about earlier repairs to the joints
- On commercial sites, let us know about site rules
How to get a quote
We do not publish a price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.