Greater London · England
External Mastic in Putney Vale
Sealing brickwork movement joints, render, cladding and façade joints for Putney Vale, backed by a 12-month guarantee. Call for a quick quote.
- Sealant pulling away from one side of the joint
- Movement joints filled with mortar instead of sealant
- Panel joints letting water in
How we handle external mastic in Putney Vale
For buildings in Putney Vale, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. We work on render & cladding joints, copings & trims and joints between brick and frames, and common reasons people get in touch are water getting into walls through failed joints and hard, crazed mastic that has stopped moving.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Putney Vale, joints up high may need ladders or other access, which is worth talking through when you book.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Putney Vale (SW15, KT2, SW19)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What happens if it’s left?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in Putney Vale.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we’ll go through it with you.
What you get with us
- Colour agreed with you before any work starts
- Any old sealant cut out fully, not covered over
- More than 20 years in sealant work
- Trusted Arbo and Everbuild sealants
Walls and rooflines in Putney Vale
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. London and the South East are among 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, Putney Vale can be tricky for parking: let us know about parking bays, permits or a driveway. If you live in an older home near St John the Baptist, an extension built onto an older house moves differently, and the joint between them takes the strain.
Putney Vale is about 2 miles north-west of Wimbledon, in Greater London. Every kind of property in Putney Vale can book us for external mastic, old or new, large or small. The work is guaranteed for a year. We cover 764 towns and villages across Greater London, large and small. Our London page covers work nearby, about 8 miles away.
Every address in SW15, KT2 and SW19 is covered for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on Stag Lane, Friars Avenue and Kingston Road or a nearby road, our applicators can take on the job. Main roads around Putney Vale include the A308, which makes travel easy. We also cover the places around Putney Vale: Kingston Vale (1 mile south), Coombe Hill (1 mile west), Coombe (1 mile south-west), Crooked Billet (1 mile south-east) and Copse Hill (1 mile south-east). Larger places within reach include London (8 miles north-east), City of Westminster (7 miles north-east), Marylebone (7 miles north-east), Kensington (5 miles north-east), St Pancras (9 miles north-east) and Shoreditch (10 miles north-east).
What’s near Putney Vale
In Putney Vale, that means homes and buildings near Robin Hood Primary School, Duke of Cambridge pub and Wimbledon Common. The nearest railway station is Raynes Park station, roughly 2 miles south-east of the centre. Other landmarks nearby include Wimbledon Windmill Museum (0.8 miles east) and Putney Exchange (2.5 miles north-east). Open spaces near Putney Vale include Kew Gardens Lake and Fishpond Wood and Beverley Meads.
Common problems we fix in Putney Vale
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and make things worse.
Signs it’s time to call us include:
- Panel joints letting water in
- Movement joints filled with mortar instead of sealant
- Joints where the bead has come unstuck
- Joints with sealant missing in places
Managing a site like Hall School Wimbledon? Then its movement joints, gutters and trims need looking after like any other building’s.
Questions to ask before you book
- When the joint can take water or movement
- What happens if the job turns out different
- Whether all the old sealant comes out first
- How the joint is cleaned and prepared
How it works
Every visit runs the same way: we check the joints, protect the area around them, do the work and clear up. Most jobs take a few hours for a handful of joints, longer for a whole elevation. In a London area like Putney Vale, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- On commercial sites, let us know about site rules
- Plan for the work area to be out of bounds to pets and children
- Let us know about parking restrictions
Getting a quote
For external mastic in Putney Vale, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
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DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Common questions in Putney Vale
Is Putney Vale in your area for external mastic?
Yes. Our work covers London and the South East, and Putney Vale is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
Do you work for landlords with property near Raynes Park station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Where is Mr Mastic based?
Our base is Crawley. Our area covers South East England, London and Scotland.
What is a movement joint?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move, and it should be sealed with a flexible sealant.
How long should I leave it?
Different products cure at different speeds, so please follow the time we give you.
Why do you put foam in the joint first?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Do you seal joints where cladding meets other materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
What the job involves on each surface
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it or an approved alternative. Tell us what the building has when you get in touch.
Places near Putney Vale
What else we do in Putney Vale
For landlords and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Honest limits
We will not take on work that will not last, so these are the limits:
- Loose or hollow render, which needs re-rendering
- Cracking across the wall rather than at a joint
- Movement that’s more than a sealant joint can take
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before booking.
Where we work in Putney Vale
- Façade panels
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block