Greater London · England
External & façade joints in Richmond upon Thames, Greater London
Sealing brickwork movement joints, render, cladding and façade joints in Richmond upon Thames, with a 12-month guarantee on every job. Call for a quick quote.
- Failed seals between different materials
- Plants rooting in failed movement joints
- Panel joints letting water in
About our external mastic in Richmond upon Thames
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We take the old material out and do it properly. We work on render & cladding joints, brickwork movement joints and façade panels, and people most often call us about joints pointed up with cement by mistake and plants rooting in failed movement joints.
Newer London blocks are built with movement joints in brick and render, and with cladding joints sealed with mastic. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall, and both kinds of building are found across London.
A 12-month guarantee comes as standard, so you’re covered after we’ve gone.
- Where
- Richmond upon Thames (TW9, TW10, SW14, TW1)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Honest limits
We won’t take on work that won’t last, so these are the limits:
- Structural movement, which needs a surveyor or engineer
- Adding movement joints to masonry that has none
- Rising or penetrating damp from elsewhere in the wall
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Façade panels
- Joints between brick and frames
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Copings & trims
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Ask before painting over external sealant
- Point out the joints to other trades
- Keep high-pressure jets off the joints
- Clear growth from the base of walls and joints
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
External mastic in Richmond upon Thames: local notes
In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Richmond station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you live in an older home near Holy Trinity Richmond, an extension built onto an older house moves differently, and the joint between them takes the strain. Richmond upon Thames is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Richmond upon Thames is about 3 miles south of Ealing, in Greater London. Our applicators cover external mastic for homes and businesses in Richmond upon Thames, as part of our work across Greater London. Our Greater London coverage runs to 764 places, and Richmond upon Thames is one of them. You can also see our page for London, about 9 miles away.
Every address in TW9, TW10, SW14 and TW1 is covered for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on Church Road, King George Square and Topiary Square or a nearby road, we can help. Richmond upon Thames sits on or near the B321 and B322. We also cover the places around Richmond upon Thames: North Sheen (1 mile north-east), East Sheen (1 mile east), Mortlake (1 mile east), Kew (2 miles north-east) and Strand-on-the-Green (2 miles north-east). Further out, we also cover London (9 miles east), City of Westminster (7 miles north-east), Marylebone (8 miles north-east), Kensington (5 miles north-east), St Pancras (9 miles north-east) and Shoreditch (10 miles north-east).
Around Richmond upon Thames
Locally, jobs take us to homes and businesses close to Pesthouse Common, The White Horse Richmond pub and Kneller Hall Junior School, among other places. There’s a railway station in Richmond upon Thames itself: Richmond station. A little further out are Eel Pie Island Museum (1.5 miles south-west) and Treaty Centre (3 miles west). The countryside around Richmond upon Thames includes Duke's Hollow and Richmond Hill.
Places near Richmond upon Thames
More services for Richmond upon Thames
Surface by surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant.
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind.
Landlords, agents and businesses in Richmond upon Thames
For anyone letting property in or around Richmond upon Thames, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
How the visit works
When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work begins. The work generally takes a few hours to a few days, depending on the length of joint and the access. For a job in Richmond upon Thames, 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 inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- We clean both faces of the joint and prime them where the product calls for 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.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
- Let us know about parking restrictions
Getting a quote
Need a quote? Please call 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Read more
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Richmond upon Thames questions
Can you do external mastic in Richmond upon Thames?
Yes. Our work covers London and the South East, and Richmond upon Thames is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.
Do you work for landlords with property near Richmond station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
How long does external mastic last?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly.
Are you ARBOMaster approved?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do the sealants smell?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Can you do several jobs on one visit?
Yes. Just list everything you need.
How we quote for external mastic
The price is agreed before any work begins. It’s based on:
- When we can work, for business premises
- Any mould that needs treating
- The size of the job
- Which sealant suits the joint
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first and give you a clear price before any work starts.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Access, such as stairs, a lift or height
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
- Where the property is
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or drop us an email.