Greater London · England
New Build Mastic in Hammersmith
New build mastic across Hammersmith and nearby, with old sealant always removed completely.
- Worktop and upstand sealant coming away
- Cracked caulk along new skirting
- Sealant applied over dusty or wet surfaces
Honest limits
Sealant isn’t the answer to every problem, and we’d rather say so up front. It will not solve:
- Baths and trays that move too much for sealant to cope with
- Deciding who is responsible under a builder’s warranty
- Cracked trays, tiles or worktops
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Where we work in Hammersmith
- Windows & doors
- Plot handovers
- Bathrooms & en suites
- Kitchens
- Show homes
- Skirting & floors
New build mastic in Hammersmith, done properly
Building dust is behind a lot of failed new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the sealant actually sticks instead of bonding to the dust. Common call-outs are for messy sealant that spoils new finishes and second-fix sealing on new plots, across windows & doors, bathrooms & en suites and show homes.
Much of London’s new housing is flats in larger developments. Snagging there often goes through the developer or managing agent, and failed shower seals, open skirting joints and gaps at thresholds are typical.
Each job carries a 12-month guarantee.
- Place
- Hammersmith (W6, W14, W12, W4)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Different surfaces, different methods
Kitchens
Beside the sink, the joint takes water every day. A kitchen sealant goes in there.
Skirting and floors
As timber and screed dry, skirting and floors shift. We use a flexible product rather than caulk.
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
New build mastic around Hammersmith
Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
As a London address, Hammersmith can be tricky for parking: let us know about parking bays, permits or a driveway.
Hammersmith is about 1 mile west of Kensington, in Greater London. Every kind of property in Hammersmith can book us for new build mastic, old or new, large or small. Every job comes with our 12-month guarantee. Hammersmith is one of 764 towns and villages in Greater London we cover for new build mastic. You can also see our page for London, about 6 miles away.
Postcode districts we cover here for new build mastic: W6, W14, W12 and W4. New build mastic is available to properties on The Square, Ravenscourt Square and Westcroft Square and the roads around them. Other places close to Hammersmith include 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). Within a short drive, we also cover 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
Around Hammersmith, our work takes us to homes and buildings near The Duke of Hammersmith pub, Brook Green and Polish Library POSK in London and the streets around them. For rail, the closest station is Kensington Olympia station, about 0.8 miles east. Other landmarks nearby include West London Hospital (within half a mile south-east) and Kurdish Museum Library and Archive (under half a mile south-west). Open spaces near Hammersmith include Campden Hill and WWT London Wetland Centre.
Hammersmith: your questions answered
Do you work for landlords with property near Kensington Olympia station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover Hammersmith for new build mastic?
Yes. Our work covers London and the South East, and Hammersmith is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.
Can you do plot mastic on a new development?
Yes. We work through plots to your schedule. Tell us the plots and the joints involved for a clear quote.
Do you guarantee your work?
Yes: twelve months. If anything is not right with the work within the year, let us know and we’ll sort it.
Can you work from my snagging list?
Yes. Send it with photos and we’ll quote for the sealant items. Items that need a plumber, tiler or the builder are flagged.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Can new sealant go on top of the old bead?
No. We always remove the existing bead, the joint cleaned and primed where needed, before resealing.
Why act early in Hammersmith
A hairline gap at a skirting can wait, but water getting through cannot. Not sure whether yours can wait? You can ring 0345 464 0079 or send us an email with a few photos. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
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, and we will explain the quote if you ask.
Why us?
- Sanitary silicone with an anti-fungal additive in wet areas
- Sealant colour chosen to suit
- Over 20 years’ experience
- We agree the colour with you first
Landlords, agents and businesses in Hammersmith
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together.
The process
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours in a single home. In Hammersmith, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out down to clean surfaces.
- Joints are vacuumed and cleaned of building dust.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Before we arrive
- Let us know about stairs, lifts or work at height
- For indoor joints, keep the area dry beforehand if you can
- Clear items away from the joints we are working on
Getting a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. Whenever you are ready, ring 0345 464 0079 or send us an email.
Related advice
Nearby places to Hammersmith
More services for Hammersmith
What we’re called out for in Hammersmith
Baths and trays settle under load once the home is lived in. If a bath wasn’t filled when it was sealed, the bead is stretched the first time it’s used.
These are the problems we are asked about most:
- Sealant that never bonded to the surface
- Cracked sealant around new window and door frames
- Kitchen sealant that has pulled off the wall
- Leaking shower tray seals in a new home
If you’ve bought a new home near Kensington Olympia station, the sealant around baths, showers and frames is worth checking in the first year or two.
Before you book anyone
- How the joint is cleaned and prepared
- What the cure time is
- What guarantee comes with the work
- Which sealant they’ll use, and why