Greater London · England
External Mastic in Kensal Town
Problem with your movement joints in Kensal Town? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Weathered mastic that no longer stretches
- Water getting into walls through failed joints
- Weeds or debris growing in open joints
For landlords and businesses
For anyone letting property in or around Kensal Town, several properties can go on one quote. Send us the addresses and the work at each, and photos by email help.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
External mastic in Kensal Town, done properly
For buildings in Kensal Town, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. Common call-outs are for rigid filler in a joint that should flex and old sealant gone brittle and cracked, across copings & trims, render & cladding joints and concrete & block.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Kensal Town, joints up high may need ladders or other access, which is worth talking through when you book.
Every job comes with our 12-month guarantee, wherever you are in Greater London.
- Location
- Kensal Town (W10, W9, W11)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
When it isn’t the sealant
Sealant isn’t the answer to every problem, and we’ll tell you before any work starts. Sealant won’t put right:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracked brickwork or render that needs a builder or plasterer
- Subsidence or other structural problems
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Kensal Town
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
- Façade panels
- Concrete & block
- Render & cladding joints
Your questions about external mastic in Kensal Town
Can you do external mastic in Kensal Town?
Yes. Our work covers London and the South East, and Kensal Town is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing.
Can you help a landlord with a rental near Queens Park (London) station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme.
Why is there a gap in my brick wall?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
What colours does the sealant come in?
The sealant colour is picked to suit the wall. There’s a wide choice of exterior colours.
Do I need to be at home?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
What happens on the day
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours to a few days, depending on the length of joint and the access. In a London area like Kensal Town, 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.
- First, the joints are inspected and the access agreed.
- 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.
How to prepare
- Keep children and pets away from the work area
- Let us know about parking restrictions
- On commercial sites, let us know about site rules
Get a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll talk you through the work and give you a clear price.
Read more
Different surfaces, different methods
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
How we quote for external mastic
We do not publish a price list, because jobs vary so much. The quote depends on:
- How much old sealant there is and how hard it is to remove
- Whether the work is at height
- The number of rooms or windows
- When we can work, for business premises
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Call for a quick quote and we will go through it with you.
Helping us quote
When you contact us, these details help:
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- Any access issues, like height or stairs
- Any previous sealing or DIY work
We quote each job on its own, so the first step is telling us about yours. Simply call 0345 464 0079 or drop us an email and describe the job, and pictures are welcome.
Do you need external mastic in Kensal Town?
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
Most people get in touch when they notice one of these:
- Rain getting behind render or cladding at a joint
- Sealant that has lost its bond to the brick or render
- Rigid filler in a joint that should flex
- Failed seals between different materials
As a London address, Kensal Town can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- What product goes in the joint
- How the colour is chosen
- Whether they seal over old material or remove it
- How hidden problems are handled
Kensal Town buildings and the weather
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. With historic houses such as Kensington Palace (about 1.6 miles south-east) nearby, there’s older building stock in the area around Kensal Town as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
If you let a flat or house near Queens Park (London) station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. For site and facilities teams at buildings such as St Thomas' CofE Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Kensal Town is about 2 miles north of Kensington, in Greater London. Whether you’re in the middle of Kensal Town or further out, external mastic is available for homes and businesses alike. Our area takes in 764 places across Greater London.
All of W10, W9 and W11 is covered for external mastic, from the main roads to the quietest streets. We cover properties on Peach Road, Parry Road and Barlby Road. Main roads around Kensal Town include the A4207, which makes travel easy. Nearby, we also carry out external mastic in North Kensington (1 mile west), Notting Dale (1 mile south), Kensal Rise (1 mile north-west), Queen's Park (1 mile north-east) and Kensal Green (1 mile north-west). We also work in nearby towns such as London (5 miles east), City of Westminster (3 miles east), Marylebone (3 miles east), St Pancras (4 miles east), Shoreditch (6 miles east) and Walthamstow (9 miles north-east).
Landmarks near Kensal Town
Typical jobs here are in homes near All Saints Catholic College, Emslie Horniman's Pleasance and Maida Vale School and the streets around them. For rail, the closest station is Queens Park (London) station, about 0.7 miles north of the centre. Other landmarks nearby include Westfield London (1.2 miles south-west) and Paddington General Hospital (0.5 miles east). For a walk, there’s Campden Hill and Greville Place nature reserve.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.