Greater London · England
External & façade joints in Strand-on-the-Green, Greater London
We cover Strand-on-the-Green for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Panel joints letting water in
- Sealant pulling away from one side of the joint
- Hard, crazed mastic that has stopped moving
About our external mastic in Strand-on-the-Green
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the joint does not stand out. Typical jobs include sealant pulling away from one side of the joint and joints with sealant missing in places, on brickwork movement joints, façade panels and render & cladding joints.
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 Strand-on-the-Green, it’s worth checking who is responsible for the outside before booking.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Strand-on-the-Green (W4, TW9, TW8)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How the visit works
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours to a few days, depending on the length of joint and the access. 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, the joints are inspected and the access agreed.
- 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.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Tell us if parking is tricky
- Move anything stored near the joints
- Let us know about earlier repairs to the joints
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
Related advice
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Walls that need new movement joints cut into them
- Render that is blown, hollow or coming away
- Subsidence or other structural problems
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before booking.
What we seal
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
- Façade panels
- Joints between brick and frames
- Concrete & block
Nearby places to Strand-on-the-Green
Other services in Strand-on-the-Green
Strand-on-the-Green: your questions answered
Do you work for landlords with property near Chiswick station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
Can you do external mastic in Strand-on-the-Green?
Yes. Our work covers London and the South East, and Strand-on-the-Green is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll send you a clear quote.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
How much does external mastic cost in Strand-on-the-Green?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Is it messy?
Tidy work is part of the job. We protect what’s around the joints, and we clear up when we’re done.
How often do external joints need resealing?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Every job carries our one-year guarantee.
Is it OK to fill a movement joint with cement?
No. Rigid materials cannot move with the wall and the joint fails. If it has already been filled, we can usually cut it out and reseal it.
What we are called out for in Strand-on-the-Green
Some movement joints have been pointed up with mortar by mistake. The joint cannot move, so the wall cracks somewhere else instead.
These are the problems we are asked about most:
- Gaps where render, brick and frames meet
- Plants rooting in failed movement joints
- Brick movement joints where the sealant has split
- Hard, crazed mastic that has stopped moving
For landlords with property near Chiswick station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What to look for in a quote
- What happens if they find a problem under the old sealant
- What product goes in the joint
- Whether you can choose the colour
- What preparation is included
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Point out the joints to other trades
- Look over the joints every year, ideally after winter
- Have failed joints looked at early
- Fix overflowing gutters above sealed joints
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years.
Should I try it myself first?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Strand-on-the-Green buildings and the weather
London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts. With historic houses such as Kew Palace (about 0.7 miles west) nearby, there’s older building stock in the area around Strand-on-the-Green as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Schools such as Strand-on-the-Green Infant and Nursery School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Homes close to St Paul's Church include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Strand-on-the-Green is about 2 miles south of Acton, in Greater London. Jobs in Strand-on-the-Green get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 764 towns and villages across Greater London, from the larger towns to small villages. You can also see our page for London, about 8 miles away.
We cover every part of W4, TW9 and TW8 for external mastic. Local streets include Kew Road, Maze Road and Kent Road, and we cover them all. Main roads around Strand-on-the-Green include the A3000, so getting to you is simple. Other places close to Strand-on-the-Green include Kew (1 mile south), Grove Park (1 mile east), Gunnersbury (1 mile north), North Sheen (1 mile south) and Turnham Green (1 mile east). Larger places within reach include London (8 miles east), City of Westminster (6 miles east), Marylebone (6 miles east), Kensington (3 miles east), St Pancras (7 miles north-east) and Shoreditch (9 miles east).
Near you in Strand-on-the-Green
Typical jobs here are in homes near Chiswick School, Kew Green and Bull's Head pub and the streets around them. You’ll also find Library for Iranian Studies (1.6 miles north) and Kew College Prep (within half a mile south-west). The nearest railway station is Chiswick station, about 0.5 miles south-east. Other landmarks nearby include Livat Hammersmith (2.2 miles east) and Barnes Hospital (1.5 miles south-east). Open spaces near Strand-on-the-Green include Richmond Hill and Kew Gardens Lake.
Landlords, agents and businesses in Strand-on-the-Green
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
Landlords and letting agents in Strand-on-the-Green can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and does not last. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
What you pay reflects the work, not guesswork. That is why we ask a few questions first and agree the price before starting.
What you get with us
- More than 20 years in sealant work
- White, clear, grey or coloured to suit, where the product allows
- Anti-fungal silicone where joints get wet
- Trusted Arbo and Everbuild sealants
Take a look at our cost guide or what customers say.