Greater London · England
External & façade joints in Coombe, Greater London
Problem with your movement joints in Coombe? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Plants rooting in failed movement joints
- Joints with sealant missing in places
- Sealant pulling away from one side of the joint
What the job involves on each surface
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. A primer goes on where the product requires one before sealing.
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. We prime where the product needs it.
External mastic for homes and businesses in Coombe
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. We work on joints between brick and frames, brickwork movement joints and copings & trims, and common reasons people get in touch are joints where the bead has come unstuck and old sealant gone brittle and cracked.
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 Coombe, it’s worth checking who is responsible for the outside before booking.
Big or small, it’s backed by our 12-month guarantee in Coombe and across Greater London.
- Place
- Coombe (KT2, KT3, SW20)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
When to call us in Coombe
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
If you can see any of these, it’s time to have the joints looked at:
- Rigid filler in a joint that should flex
- Sealant pulling away from one side of the joint
- Hard, crazed mastic that has stopped moving
- Failed sealant between panels on a façade
Coombe is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
What your quote should include
- How the surfaces are prepared before sealing
- How the colour is chosen
- Whether they seal over old material or remove it
- Who does the work, and how experienced they are
Walls and rooflines in Coombe
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. With historic houses such as Southside House (about 1.4 miles east) nearby, there’s older building stock in the area around Coombe as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
For site and facilities teams at buildings such as Coombe Hill Junior School, larger buildings have long runs of movement joint that eventually need resealing. For an older house near a landmark such as Christ Church New Malden, an extension built onto an older house moves differently, and the joint between them takes the strain.
Coombe is about 1 mile north of New Malden, in Greater London. Jobs in Coombe get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Across Greater London, we cover 764 places, and Coombe is one of them. You can also see our page for London, about 9 miles away.
Postcode districts we cover here for external mastic: KT2, KT3 and SW20. You’ll find streets such as West Road, Crown Road and Traps Lane. Other places close to Coombe include Motspur Park (1 mile south-east), Coombe Hill (1 mile north), Kingston Vale (1 mile north-east), Norbiton (1 mile south-west) and New Malden (1 mile south). Larger places within reach include London (9 miles north-east), City of Westminster (8 miles north-east), Marylebone (8 miles north-east), Kensington (6 miles north-east), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
Landmarks near Coombe
Typical jobs here are in homes near Canbury School, Coombe Girls' School and The Royal Oak Public House and the streets around them. Coombe’s nearest station is Norbiton station, about 1 mile south-west. A little further out are Bentall Centre (1.8 miles west) and White Lodge Museum (1.8 miles north). Not far away are Kew Gardens Lake and Kingston Hill Road area.
What affects the quote in Coombe
Your quote is based on your job. We look at:
- Any mould that needs treating
- The type of sealant required
- The size of the job
- The old material and how stubborn it is
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- A few pictures by email, if you can
- Where the job is, and your postcode
- The rough size of the job
- The type of property
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that’s easy.
Places near Coombe
Also in Coombe
How the visit works
On the day, we look over the joints with you first, so you know exactly what we are doing. We protect the surfaces around the joints before any work begins. The work usually takes a few hours for a handful of joints, longer for a whole elevation. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- On commercial sites, let us know about site rules
- Plan for the work area to be out of bounds to pets and children
- Tell us about any water getting in
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll talk you through the work before giving you a price.
Related advice
For landlords and businesses
We work for landlords and letting agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Honest limits
Sealant isn’t the answer to every problem, and we’d rather say so up front. It will not solve:
- Subsidence or other structural problems
- Damp that isn’t coming from the joint
- Walls that need new movement joints cut into them
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
What we seal
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
- Façade panels
- Concrete & block
- Joints between brick and frames
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Coombe: your questions answered
Do you work for landlords with property near Norbiton station?
Yes. We work for letting agents and landlords as well as householders. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear quote.
Do you cover Coombe for external mastic?
Yes, Coombe is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we will give you a clear price.
What colours does the sealant come in?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best so the joint does not draw the eye.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
Can you seal joints between two different materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
How long will you be here?
Most jobs take a few hours to a few days, depending on the length of joint and the access, including preparation and clearing up. Your quote will say how long we expect yours to take.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.