Greater London · England
External & façade joints in Waterloo, Greater London
Specialist external mastic for Waterloo: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Old sealant gone brittle and cracked
- Weeds or debris growing in open joints
- Joints where the bead has come unstuck
How we quote for external mastic
The quote reflects the job in front of us. We look at:
- The number of rooms or windows
- Working hours on commercial sites
- How easy the joints are to reach
- Which sealant suits the joint
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Where the job is, and your postcode
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
- Photos by email, if that is easy
If you are in Waterloo and need external mastic, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
External mastic in Waterloo
On houses, flats and commercial buildings across Waterloo, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you have moss and dirt in joints with no sealant left and rigid filler in a joint that should flex, we can put it right.
London’s terraces and conversions often share walls, gutters and downpipes with their neighbours, so a leaking gutter joint or failed wall joint can affect more than one home. In a converted house in Waterloo, it’s worth checking who is responsible for the outside before booking.
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.
- Location
- Waterloo (SE1, SE11, WC2N)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
After the cure time, these simple habits help:
- Leave the joints unpainted unless we have said otherwise
- Check external joints each spring
- Deal with leaking gutters that soak the joints below
- Act on the first splits you see
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal.
How it works
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then 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 Waterloo. It helps if you can point us to a visitor permit or a bay close to the door.
- 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.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Tell us if parking is tricky
- Clear the area around the work
- Mention if the joints have been sealed before
Ask for a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we’ll take it from there.
Advice
FAQs for Waterloo
Is parking a problem for a job in Waterloo?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Can you help a landlord with a rental near London Waterloo station?
Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. You can phone 0345 464 0079 or email us with the details for a clear quote.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
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 tell you when we quote.
What’s an expansion joint in brickwork?
Brickwork, render and cladding all move a little, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
Where do you work from?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
What sealant do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
When will the joints need doing again?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and reseal when it splits.
External mastic in Waterloo: local notes
Historic houses like Benjamin Franklin House (about 0.7 miles north-west) are a reminder that the area around Waterloo 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. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
As a London address, Waterloo can be tricky for parking: let us know about parking bays, permits or a driveway. Schools such as Oasis Academy Johanna are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Waterloo is about 1 mile west of London, in Greater London. Homes, rented property, offices and hotels in Waterloo can book us for external mastic. The work is guaranteed for a year. Our area takes in 764 places across Greater London, from the larger towns to small villages.
Every address in SE1, SE11 and WC2N is within our area for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on York Road, Spur Road and Bear Lane or a nearby road, we can help. You will find Waterloo on the A301 and A302, so it’s easy for us to get to. If you’re just outside Waterloo, we cover South Bank (1 mile north-west), Bankside (1 mile north-east), Adelphi (1 mile north-west), Temple (1 mile north) and Charing Cross (1 mile north-west). We also work in nearby towns such as Kensington (4 miles west), Walthamstow (7 miles north-east), Hoxton (3 miles north-east), Hampstead (5 miles north-west), Ruislip (14 miles west) and Orpington (12 miles south-east).
What’s near Waterloo
We work in homes and buildings around Jubilee Gardens, Oasis Academy South Bank and Lambeth Palace Library, among other places. Nearby too are The Duke of Sussex pub (under half a mile east) and Oasis Academy South Bank (within half a mile south). Waterloo has its own railway station: London Waterloo station. Well-known places in the area include Gabriel's Wharf (0.5 miles north) and Baynard's Castle (0.9 miles north-east). Green spaces nearby include Ludgate Hill and Bellenden Road Nature Garden.
Do you need external mastic in Waterloo?
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it can’t stretch and tears as soon as the joint widens.
People normally contact us when they notice something like this:
- Moss and dirt in joints with no sealant left
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
- Cracked joints where brick meets render or frames
Letting a property close to London Waterloo station? Then split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- Is VAT in the price?
- What preparation is included
- The length of the guarantee
- How long to leave it before use
How the job changes by surface
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
Landlords, agents and businesses in Waterloo
For anyone letting property in or around Waterloo, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Towns and villages near Waterloo
Also in Waterloo
Leave it or put it right?
Running new sealant over the old bead rarely lasts. The new layer can’t bond properly to old, weathered material, so we always take the old sealant out. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Waterloo, the repair is bigger than a sealant job.
Combining jobs into one visit is generally more efficient than separate visits. We’ll give you a clear price for the lot.
Why book with us
- Neat joints and a tidy finish
- Fully insured
- We agree the colour with you first
- Every job guaranteed for a year
See our cost guide or customer reviews.