Greater London · England
External Mastic in Kingston upon Thames
Problem with your movement joints in Kingston upon Thames? We remove the old material, prepare the joints and seal them properly.
- Hard, crazed mastic that has stopped moving
- Rain getting behind render or cladding at a joint
- Movement joints filled with mortar instead of sealant
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
External mastic in Kingston upon Thames, done properly
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We take the old material out and do it properly. If you have hard, crazed mastic that has stopped moving and moss and dirt in joints with no sealant left, we can help, on façade panels, brickwork movement joints and render & cladding joints alike.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in Kingston upon Thames, tell us how high the joints are and how to reach the back of the building.
Big or small, you get the same 12-month guarantee.
- Place
- Kingston upon Thames (KT2, KT1, TW10)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Check external joints each spring
- Point out the joints to other trades
- Leave the joints unpainted unless we’ve said otherwise
- Wash walls gently around the sealant
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
External mastic in Kingston upon Thames: local notes
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking.
For landlords with property near Kingston station, split movement joints are easy to miss on a rental until damp shows inside. If you look after a building such as St Luke's CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Kingston upon Thames is about 7 miles south-west of Kensington, in Greater London. Across the KT2 area, we cover external mastic for homes and businesses. Across Greater London, we cover 764 places, and Kingston upon Thames is one of them. London is on our list too, about 11 miles from Kingston upon Thames.
Here we cover the KT2, KT1 and TW10 postcode area for external mastic. That includes homes and businesses on Sigrist Square, Old London Road and London Road. You’ll find Kingston upon Thames on the B3365, which makes it straightforward to reach. Other places close to Kingston upon Thames include Norbiton (1 mile east), Coombe (2 miles east), New Malden (2 miles south-east), Coombe Hill (2 miles north-east) and Motspur Park (2 miles east). Further out, we also cover London (11 miles north-east), City of Westminster (9 miles north-east), Marylebone (10 miles north-east), Kensington (7 miles north-east), St Pancras (11 miles north-east) and Shoreditch (12 miles north-east).
Landmarks near Kingston upon Thames
In Kingston upon Thames, that means homes and buildings near Canbury Gardens, The Grey Horse pub and Kingston Grammar School. Kingston upon Thames has its own railway station: Kingston station. A little further out are Eel Pie Island Museum (2.6 miles north-west) and Kingston Hospital (0.7 miles east). The countryside around Kingston upon Thames includes Rose Walk and Kingston Hill Road area.
What we do, step by step
On the day, we look over the joints with you first. Surfaces next to the work are protected before any work begins. Most jobs take anything from a few hours to several days, depending on the building. In Kingston upon Thames, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Tell us about any water getting in
- Tell us if parking is tricky
How to get a quote
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Read more
Quotes for external mastic in Kingston upon Thames
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How easy the joints are to reach
- Which sealant suits the joint
- The old material and how stubborn it is
- Whether there’s mould to deal with
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What we need to know
To help us quote quickly, please include:
- Pictures of the joints, sent by email
- The type of property
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
We quote each job on its own. Just phone 0345 464 0079 or send us an email with the details.
Your questions about external mastic in Kingston upon Thames
Do you work for landlords with property near Kingston station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Is parking a problem for a job in Kingston upon Thames?
Parking in Kingston upon Thames, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Why do you put foam in the joint first?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. Then the sealant bonds to two faces and can move.
How long does external mastic last?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Our work comes with a 12-month guarantee.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply ring 0345 464 0079 or email us.
How do I get a quote for external mastic in Kingston upon Thames?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
How long will you be here?
As a guide, most jobs take a few hours to a few days, depending on the length of joint and the access. Bigger jobs take longer, and we will tell you how long to expect.
When to call us in Kingston upon Thames
Buildings move more than people expect. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
These are the problems we’re asked about most:
- Rain getting behind render or cladding at a joint
- Moss and dirt in joints with no sealant left
- Movement joints with cracked, split or missing sealant
- Sealant that has lost its bond to the brick or render
As a London address, Kingston upon Thames can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- How much experience the applicator has
- How long to leave it before use
- What insurance they hold
- What product goes in the joint
Different surfaces, different methods
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it or an approved alternative. Send us any details you have about the façade.
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. Priming is done where the sealant calls for it.
What happens if it’s left?
Water gets in through a failed movement joint. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. Converted houses in London often have a bathroom above someone else’s living room, 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 for homes in Kingston upon Thames.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or drop us an email and we will talk you through it.
Why choose Mr Mastic in Kingston upon Thames
- Fully insured
- Trusted Arbo and Everbuild sealants
- We never seal over old sealant
- A 12-month guarantee on all work
See our cost guide or what customers say.