Greater London · England
External & façade joints in Kilburn, Greater London
Problem with your movement joints in Kilburn? We cut out the old, prepare the joints and apply the right sealant.
- Rain getting behind render or cladding at a joint
- Sealant that has lost its bond to the brick or render
- Joints with sealant missing in places
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Look over the joints every year, ideally after winter
- Keep water from gutters off the wall
- Show decorators and builders where the movement joints are
- Never let anyone fill a movement joint with mortar
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
External mastic in Kilburn
On houses, flats and commercial buildings across Kilburn, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. If you are dealing with leaking joints around cladding and façade panels and sealant that has lost its bond to the brick or render, we can put it right.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so one failed joint can cause damp for more than one household. In a converted house in Kilburn, it’s worth checking who is responsible for the outside before booking.
All our work comes with our 12-month guarantee, wherever you are in Greater London.
- Where
- Kilburn (NW6, W9, W10)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Questions from Kilburn
I let a flat near Queens Park (London) station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Is parking a problem for a job in Kilburn?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Are you fully insured?
Yes. Full insurance covers our work.
Should I point up the gap in my brickwork?
No. A mortar-filled joint can’t move, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
When is the sealant fully cured?
It depends on the product. We tell you how long to leave it before we go.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
What the job involves on each surface
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible in all weathers.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
How it works
On the day, we start by going over the job with you, so you know exactly what we are doing. Surfaces next to the work are protected before any work starts. Most jobs take a few hours for a handful of joints, longer for a whole elevation. In Kilburn, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- 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.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Let us know about parking restrictions
- Try not to wet indoor joints just before the visit
- Let us know about stairs, lifts or work at height
Getting a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Read more
Nearby places to Kilburn
What else we do in Kilburn
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost near the open joint, so the problem grows beyond the joint itself. Converted houses in London often have a bathroom above someone else’s living room, 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 Kilburn.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why choose Mr Mastic in Kilburn
- Homes, businesses and hotels
- Approved under the ARBOMaster scheme
- A choice of colours where the product allows
- Quality sealants from Arbo and Everbuild
See how sealant jobs are priced and our reviews.
Walls and rooflines in Kilburn
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Queens Park (London) station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you look after a building such as Salusbury Primary School, larger buildings have long runs of movement joint that eventually need resealing. Kilburn is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Kilburn is about 3 miles north-west of City of Westminster, in Greater London. If you need external mastic in Kilburn, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We’re based in Crawley and cover Greater London, Kilburn included. Our Greater London coverage runs to 764 places, and Kilburn is one of them.
We work across NW6, W9 and W10 for external mastic and the streets around it. If you need external mastic at a property on The Lane, Dyne Road and Quex Road or a nearby road, our applicators can take on the job. With the A4003 close by, Kilburn is easy for our applicators to reach. Other places close to Kilburn include Queen's Park (1 mile south), Kensal Rise (1 mile south-west), Brondesbury (1 mile north), Kensal Town (1 mile south) and Kensal Green (1 mile south-west). Larger places within reach include London (5 miles south-east), City of Westminster (3 miles south-east), Marylebone (3 miles south-east), Kensington (3 miles south), St Pancras (4 miles east) and Shoreditch (5 miles east).
Near you in Kilburn
Locally, jobs take us to homes and businesses close to The Brondesbury Arms, Maida Vale School and Queen’s Park and the streets around them. Kilburn has its own railway station: Queens Park (London) station. A little further out are Paddington General Hospital (1 mile south) and Brent Museum and Archives (1.3 miles north-west). Green spaces nearby include Greville Place nature reserve and Primrose Hill.
What sealant work cannot fix
In fairness, some problems need a different trade:
- Cracked brickwork or render that needs a builder or plasterer
- Loose or hollow render, which needs re-rendering
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before you book.
Surfaces we seal
- Concrete & block
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Copings & trims