Greater London · England
External Mastic in Cricklewood
We cover Cricklewood for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Movement joints with cracked, split or missing sealant
- Sealant pulling away from one side of the joint
- Movement joints filled with mortar instead of sealant
Surface by surface
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.
Copings and trims
Coping joints that leak let water straight down into the wall. Sealing them early saves the wall below.
How we handle external mastic in Cricklewood
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. We’re often asked to deal with weathered mastic that no longer stretches and rain getting behind render or cladding at a joint, on render & cladding joints, copings & trims and brickwork movement joints.
Outside work in London starts with access: side passages, upper floors and where to park. For a home in Cricklewood, tell us how high the joints are and how to reach the back of the building.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Cricklewood (NW2, NW6, NW10)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Cricklewood
I let a flat near Cricklewood station. Can you help?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Is parking an issue for external mastic in Cricklewood?
Parking in Cricklewood, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
Do you use backing rod?
We fit closed-cell backing rod wherever the joint depth needs controlling. It controls the depth and stops the sealant bonding to the back, so the joint can move.
What is a movement joint?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It should be filled with flexible sealant, never mortar.
How long will you be here?
That depends on how much there is to do, but as a guide it takes a few hours for a handful of joints, longer for a whole elevation. We will give you a better idea when we quote.
Where is Mr Mastic based?
We’re based in Crawley, and we cover South East England, London and all of Scotland.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or send us an email.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. We’ll talk through colour options before work begins, matched as closely as the range allows.
How we quote for external mastic
For a quick quote, just ask. What matters most is:
- The amount of work
- The old material and how stubborn it is
- How many rooms, windows or areas are involved
- Which sealant suits the joint
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What we need to know
To make quoting easier, let us know:
- Whether it’s a home or a business
- The problem you’ve noticed
- Whether it has been sealed before
- Pictures of the joints, sent by email
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job, and we’ll come back to you with a quote.
How it works
A visit follows a simple pattern: we look at the joints together, protect the area around them, carry out the job and tidy away. Most jobs take anything from a few hours to several days, depending on the building. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Cricklewood. 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.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Move anything stored near the joints
- Mention any leaks or damp you’ve noticed
- Mention any parking rules near the property
How to get a quote
Need a quote? Please call 0345 464 0079 or email us 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
What sealant work cannot fix
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Movement that is more than a sealant joint can take
- Adding movement joints to masonry that has none
If you’re not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Where we work in Cricklewood
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Render & cladding joints
Common problems we fix in Cricklewood
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
If you can see any of these, it’s time to have the joints looked at:
- Joints with sealant missing in places
- Cracked joints where brick meets render or frames
- Damp patches traced to an open external joint
- Sealant pulling away from one side of the joint
Cricklewood is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Comparing quotes
- Is the old sealant removed completely?
- How much experience the applicator has
- Which sealant they’ll use, and why
- What guarantee comes with the work
Work for landlords, hotels and businesses
We also work for property managers and facilities teams in Cricklewood and across Greater London. We can quote a run of properties together.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Leave it or put it right?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way. 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 Cricklewood.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Why us?
- Neat joints and a tidy finish
- One-year guarantee on every job
- White, clear, grey or another colour, product permitting
- Sanitary silicone with an anti-fungal additive in wet areas
Read what affects the cost and customer reviews.
Cricklewood buildings and the weather
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 Fenton House (about 1.7 miles east) are a reminder that the area around Cricklewood has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Managing a site like Anson Primary School? Then larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Cricklewood station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Cricklewood is about 1 mile north-west of Kilburn, in Greater London. From the centre of Cricklewood to the outskirts, we cover external mastic for every kind of property, from flats and houses to offices and hotels. 764 places in Greater London are on our list, from the larger towns to small villages. You can also see our page for London, about 7 miles away.
Work in NW2, NW6 and NW10 is quoted and booked the same way as anywhere else. You will find streets such as Ivy Road, Walm Lane and Dean Road. With the A407 close by, Cricklewood is easy for our applicators to reach. Close by, we work in Brondesbury (1 mile south-east), Willesden (1 mile south-west), Dollis Hill (1 mile north-west), Willesden Green (1 mile south-west) and Neasden (1 mile west). We also work in nearby towns such as London (7 miles south-east), City of Westminster (4 miles south-east), Marylebone (4 miles south-east), Kensington (4 miles south), St Pancras (5 miles south-east) and Shoreditch (6 miles east).
Local landmarks in Cricklewood
Locally, jobs take us to homes and businesses close to Hampstead School, The Crown Public House and Gladstone Park. There’s a railway station in Cricklewood itself: Cricklewood station. A little further out are St Andrew's Hospital (0.8 miles north-west) and Brent Museum and Archives (0.7 miles south-west). Green spaces nearby include Parliament Hill and Westbere Copse.