Greater London · England
Fitzrovia External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Fitzrovia, backed by a 12-month guarantee. Ask us for a quote.
- Joints with sealant missing in places
- Sealant that has lost its bond to the brick or render
- Damp patches traced to an open external joint
What we do, step by step
The work is kept neat and contained to the area we’re working on, so you can carry on as normal. Expect the work to take a few hours to a few days, depending on the length of joint and the access, and we tell you how long to leave it before we go. In a London area like Fitzrovia, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Clear the area around the work
- Mention any parking rules near the property
Ask for a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved and give you a clear quote.
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External mastic in Fitzrovia
Low-level joints can usually be done from the ground. For joints higher up, give us some details of the building and we’ll confirm what access is needed. We work on façade panels, concrete & block and copings & trims, and common reasons people get in touch are moss and dirt in joints with no sealant left and leaking joints around cladding and façade panels.
Outside work in London starts with access: side passages, upper floors and where to park. In Fitzrovia, joints up high may need ladders or other access, which is worth talking through when you book.
We stand behind the work with a one-year guarantee.
- Location
- Fitzrovia (NW1W, W1T, W1G)
- Region
- Greater London
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Outside joints around Fitzrovia
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. With historic houses such as Handel Hendrix House (about 0.8 miles south-west) nearby, there’s older building stock in the area around Fitzrovia as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
For site and facilities teams at buildings such as All Souls CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing. As a London address, Fitzrovia can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Fitzrovia is about 1 mile north-east of Marylebone, in Greater London. If you need external mastic in Fitzrovia, it’s easy to get a quote: please phone 0345 464 0079 or email us. We cover Greater London from our Crawley base, Fitzrovia included. We cover 764 towns and villages across Greater London, from the larger towns to small villages.
Jobs for external mastic in NW1W, W1T and W1G is quoted and booked the same way as anywhere else. You’ll find streets such as Euston Road, Duke's Road and Market Place. Fitzrovia sits on or near the A501 and A4200, which makes travel easy. If you are just outside Fitzrovia, we cover Euston (1 mile north-east), Marylebone (1 mile south-west), Bloomsbury (1 mile east), Somers Town (1 mile north-east) and Soho (1 mile south-east). Further out, we also cover Kensington (3 miles south-west), Shoreditch (3 miles east), Walthamstow (7 miles north-east), Whitechapel (3 miles east), Hampstead (3 miles north-west) and Ruislip (12 miles west).
Local landmarks in Fitzrovia
We work in homes and buildings around Carpenters Arms, UCL School of Slavonic and East European Studies and St Anne's Churchyard, among other places. Nearby too are Wellcome Library (under half a mile north-east) and Maria Fidelis Catholic School FCJ (less than half a mile north). Fitzrovia has its own railway station: London Euston station. Well-known places in the area include London Foot Hospital (under half a mile south-west) and Blindiana Museum (under half a mile west). Green spaces nearby include St. James's Park Lake and Primrose Hill.
Landlords, agents and businesses in Fitzrovia
For anyone letting property in or around Fitzrovia, several properties can be quoted together. Just tell us the addresses and what each one needs.
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.
Different surfaces, different methods
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Leave it or put it right?
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and doesn’t last, so it pays to do it properly once. 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 Fitzrovia.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Why Fitzrovia customers choose us
- Any old sealant cut out fully, not covered over
- A 12-month guarantee on all work
- Colour agreed with you before any work starts
- ARBOMaster approved applicator
Read what affects the cost and our reviews.
What affects the cost of external mastic
We do not publish a price list, because jobs vary so much. The quote depends on:
- The old material and how stubborn it is
- How many areas need sealing
- Any mould that needs treating
- The type of sealant required
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Access, such as stairs, a lift or height
- Roughly how big the job is
- Where the job is, and your postcode
- The type of property
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, phone 0345 464 0079 or drop us an email.
What we’re called out for in Fitzrovia
If plants are growing out of a joint, the sealant has usually failed or was never there. Dirt and roots then trap moisture in the joint.
Most people get in touch after spotting one of these:
- Movement joints filled with mortar instead of sealant
- Weeds or debris growing in open joints
- Damp patches traced to an open external joint
- Sealant that has lost its bond to the brick or render
For landlords with property near London Euston station, split movement joints are easy to miss on a rental until damp shows inside.
Questions to ask before you book
- How long to leave it before use
- How the surfaces are prepared before sealing
- Who does the work, and how experienced they are
- What product goes in the joint
Also near Fitzrovia
What else we do in Fitzrovia
Fitzrovia questions
Is parking an issue for external mastic in Fitzrovia?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Can you do external mastic in Fitzrovia?
Yes. Our work covers London and the South East, and Fitzrovia is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
How often do external joints need resealing?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away, and reseal at that point.
How long will you be here?
A typical job takes a few hours for a handful of joints, longer for a whole elevation, including the preparation. We’ll confirm how long when we quote.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces with primer where required.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Is there a guarantee?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we will put it right.
Do you work for letting agents?
Yes, often. We can quote for several properties at once, and between tenancies is a good time for the work.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.