Greater London · England
External & façade joints in Hammersmith, Greater London
Specialist external mastic for Hammersmith: careful preparation, the right product and tidy work. Call for a quick quote.
- Failed seals between different materials
- Water getting into walls through failed joints
- Plants rooting in failed movement joints
External mastic for homes and businesses in Hammersmith
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall. If you’re dealing with joints pointed up with cement by mistake and leaking joints around cladding and façade panels, we can help, whatever the surface.
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 Hammersmith, it’s worth checking who is responsible for the outside before booking.
Your job is guaranteed for a year, as with all our work.
- Place
- Hammersmith (W6, W14, W12, W4)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Hammersmith
You’ll get a clear quote before any work starts. It’s based on:
- How easy the joints are to reach
- The amount of work
- The number of rooms or windows
- Whether there’s mould to deal with
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Helping us quote
Before you ask for a quote, have a think about:
- Any access issues, like height or stairs
- What’s wrong with the joints now
- Roughly how big the job is
- Pictures of the joints, sent by email
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
How the visit works
You do not need to clear the whole room or building, just the space around the work. We protect the rest, and the work takes a few hours for a handful of joints, longer for a whole elevation in most cases. In Hammersmith, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Tell us if parking is tricky
- Tell us about any previous sealing or DIY attempts
How to get a quote
Want a quote for external mastic? Please ring 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.
Related advice
Do you need external mastic in Hammersmith?
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
If you can see any of these, it’s time to have the joints looked at:
- Water getting into walls through failed joints
- Movement joints with cracked, split or missing sealant
- Leaking joints around cladding and façade panels
- Weathered mastic that no longer stretches
Rented homes near Kensington Olympia station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Comparing quotes
- Is VAT in the price?
- Whether the sealant suits the joint
- How long to leave it before use
- Who does the work, and how experienced they are
When something else is needed
To be straight with you, some problems need a different trade:
- Failed render or damaged cladding panels
- Rising or penetrating damp from elsewhere in the wall
- Cracks in the bricks or render themselves, away from the joints
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
Where we work in Hammersmith
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
- Copings & trims
- Façade panels
- Brickwork movement joints
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Get split or bare joints resealed while the damage is small
- Fix overflowing gutters above sealed joints
- Make sure movement joints aren’t pointed over
- Walk round the building once a year and look at the joints
Don’t let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
Act while the splits are small. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in Hammersmith.
What you pay reflects the work, not guesswork. That is why we ask a few questions first and send you a clear quote before we start.
Why Hammersmith clients choose us
- We agree the colour with you first
- We’re fully insured
- Experience in homes, commercial sites and hotels
- Sanitary silicone with an anti-fungal additive in wet areas
Read how sealant jobs are priced and customer reviews.
Your questions about external mastic in Hammersmith
Do you work for landlords with property near Kensington Olympia station?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Can you do external mastic in Hammersmith?
Yes. We work across London and the South East, and Hammersmith is part of that. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Can you reach joints on upper floors?
It depends on the building. Where joints can be reached safely, we’ll do them. Give us some details and we will confirm the access.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or drop us an email.
Do I have to be there?
That depends on where the joints are. Inside work needs someone to give us access.
Can I add another job to the visit?
Yes. Just list everything you need.
How long should I leave it?
Cure times vary by product and the temperature. We tell you how long to leave it before we go.
Nearby places to Hammersmith
Other services in Hammersmith
How the job changes by surface
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind and protects the render itself.
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
Walls and rooflines in Hammersmith
With historic houses such as Kelmscott House (about 0.5 miles south-west) nearby, there’s older building stock in the area around Hammersmith as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts.
For site and facilities teams at buildings such as Corona Theatre School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Hammersmith is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Hammersmith is about 1 mile west of Kensington, in Greater London. We provide external mastic to homeowners, landlords and businesses in Hammersmith and the surrounding area. Across Greater London, we cover 764 places, Hammersmith among them. For nearby work, see our London page (6 miles or so).
All of W6, W14, W12 and W4 is covered for external mastic. Whether your property is on The Square, Ravenscourt Square and Westcroft Square or anywhere close by, our applicators can take on the job. We also cover Brackenbury Village (1 mile north-west), Brook Green (1 mile east), North End (1 mile east), West Kensington (1 mile east) and Old Chiswick (1 mile south-west). We also work in nearby towns such as London (6 miles east), City of Westminster (4 miles east), Marylebone (4 miles north-east), St Pancras (5 miles north-east), Shoreditch (7 miles east) and Walthamstow (11 miles north-east).
Near you in Hammersmith
Typical jobs here are in homes near The Duke of Hammersmith pub, Brook Green and Polish Library POSK in London and the streets around them. Hammersmith’s nearest station is Kensington Olympia station, roughly 0.8 miles east. Nearby you will also find West London Hospital (within half a mile south-east) and Kurdish Museum Library and Archive (under half a mile south-west). The countryside around Hammersmith includes Campden Hill and WWT London Wetland Centre.