Greater London · England
External Mastic in Wimbledon Chase
Specialist external mastic for Wimbledon Chase: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Rigid filler in a joint that should flex
- Moss and dirt in joints with no sealant left
- Damp patches traced to an open external joint
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
External mastic in Wimbledon Chase, done properly
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint doesn’t stand out. Common call-outs are for sealant pulling away from one side of the joint and joints pointed up with cement by mistake, on copings & trims, render & cladding joints and brickwork movement joints.
Newer London blocks are built with movement joints in brick and render, and with cladding joints sealed with mastic. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Wimbledon Chase (SW19, SW20, SM4)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Fix overflowing gutters above sealed joints
- Don’t let climbing plants root in the sealant
- Have failed joints looked at early
- Keep movement joints as flexible joints, not mortar
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead over time.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
FAQs for Wimbledon Chase
Do you work for landlords with property near Wimbledon Chase station?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
Is parking an issue for external mastic in Wimbledon Chase?
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.
When will the joints need doing again?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year.
Can a movement joint be filled with mortar?
No, not where the gap is a movement joint. Pointing it stops it working and can lead to cracking. A flexible sealant is the right fill.
Are you insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
When is the sealant fully cured?
It depends on the product and the temperature. Before we leave, we’ll tell you the cure time.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Nearby places to Wimbledon Chase
What else we do in Wimbledon Chase
Wimbledon Chase buildings and the weather
With historic houses such as Southside House (about 1 mile north-west) nearby, there’s older building stock in the area around Wimbledon Chase 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. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
Wimbledon Chase is in London, so parking needs planning: let us know about parking bays, permits or a driveway. In the older streets around St Mary's Church, the joints between older walls, newer extensions and the roofline need a sealant that can move. For landlords with property near Wimbledon Chase station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Wimbledon Chase is about 1 mile south of Wimbledon, in Greater London. Whether you’re in the middle of Wimbledon Chase or further out, we cover external mastic for every kind of property. Across Greater London, we cover 764 places, and Wimbledon Chase is one of them. Our London page covers work nearby.
We work across SW19, SW20 and SM4 for external mastic. You will find streets such as Edna Road, Manor Road and Dorien Road. Neighbouring places we cover for external mastic include Merton Park (1 mile east), Bushey Mead (1 mile west), Cannon Hill (1 mile south), Wimbledon (1 mile north) and Raynes Park (1 mile south-west). Larger places within reach include London (8 miles north-east), City of Westminster (8 miles north), Marylebone (8 miles north), Kensington (6 miles north), St Pancras (9 miles north-east) and Shoreditch (10 miles north-east).
Around Wimbledon Chase
Locally, jobs take us to homes and businesses close to Rutlish School, Cannon Hill Common and Wimbledon School of Art, among other places. Wimbledon Chase has its own railway station: Wimbledon Chase station. Nearby you will also find Southside Wandsworth (3.2 miles north) and Chessington Castle Hill (5 miles south-west). Green spaces nearby include Merton Park Green Walks and Henman Hill.
What affects the cost of external mastic
There’s no set price list, because jobs vary so much. What we look at:
- The type of sealant required
- Access and height
- Mould in or behind the old joints
- The number of rooms or windows
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
Helping us quote
To make quoting easier, please include:
- The rough size of the job
- The address or postcode of the job
- Any access issues, like height or stairs
- Whether it has been sealed before
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will talk you through the work and give you a clear price.
What we do, step by step
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take a few hours to a few days, depending on the length of joint and the access. For a job in Wimbledon Chase, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Move anything stored near the joints
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
How to get a quote
Want a quote for external mastic? Please ring 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and send you a clear quote before work begins.
Advice
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost around the joint, so the damage spreads beyond the joint. In a flat in Wimbledon Chase, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and agree the price before starting.
Why us?
- Anti-fungal sanitary silicone in wet areas
- Any old sealant cut out fully, not covered over
- Trusted Arbo and Everbuild sealants
- Neat joints and a tidy finish
See what affects the cost and our reviews.
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Adding movement joints to masonry that has none
- Subsidence or other structural problems
- Failed render or damaged cladding panels
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Where we work in Wimbledon Chase
- Copings & trims
- Façade panels
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames