Greater London · England
Little Chelsea Sand Mastic
Our applicators work in Little Chelsea on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Mastic that needs renewing before redecorating
- Modern sealant on a period surround
- Mastic worn away on windows facing the weather
Sand mastic in Little Chelsea
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant, and we will talk through which suits your home. If you have draughty sash windows at the surround and crumbling sand mastic round a window, we can help.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Little Chelsea as anywhere.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Place
- Little Chelsea (SW10, SW3, SW7)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
When it is not the sealant
A few problems are outside what sealant work can do:
- Crumbling stone or brickwork round the window
- Decisions on consent for listed homes
- Cracked or broken glass
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Timber door frames
- Stone surrounds
- Brick reveals
- Tenement windows
- Period & listed homes
- Sash and case windows
How we quote for sand mastic
We quote each job individually. This is what makes a difference:
- How much there is to do
- Any mould that needs treating
- The type of sealant required
- The old material and how stubborn it is
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or email us and we’ll talk you through it.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Any previous sealing or DIY work
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- Where the property is
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’s easy.
Landlord and commercial work in Little Chelsea
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
Little Chelsea: your questions answered
Is parking an issue for sand mastic in Little Chelsea?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Can you help a landlord with a rental near Imperial Wharf 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 will send you a clear quote.
What does sand mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote.
Is the work guaranteed?
There’s a 12-month guarantee on every job.
How long does sand mastic take to go off?
A skin forms quite soon, but full hardening takes longer. We’ll tell you what to expect for your job.
Where are you based?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Do the sealants smell?
Some sealants have a smell while they cure. Ventilation helps.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us and we are fully insured.
Little Chelsea homes and the weather
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. Historic houses like Carlyle's House (about 0.4 miles east) are a reminder that the area around Little Chelsea has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Little Chelsea is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you let a flat or house near Imperial Wharf station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Little Chelsea is about 1 mile north of World's End, in Greater London. Anywhere in SW10, we can carry out sand mastic at your property. Little Chelsea is one of 764 places in Greater London where we work.
All of SW10, SW3 and SW7 is within our area for sand mastic, from the main roads to the quietest streets. That includes homes and businesses on Ann Lane, King's Road and Lamont Road and the roads around them. We also cover World's End (1 mile south), South Kensington (1 mile north), Chelsea (1 mile north-east), Chelsea Harbour (1 mile south) and Walham Green (1 mile south-west). Within a short drive, we also cover London (4 miles east), Marylebone (3 miles north-east), St Pancras (4 miles north-east), Shoreditch (5 miles north-east), Walthamstow (10 miles north-east) and Hoxton (5 miles north-east).
Local landmarks in Little Chelsea
Around Little Chelsea, our work takes us to homes and buildings near Burton’s Court, English National Ballet School and Natural History Museum Library and Archives. Other local landmarks include Chelsea Academy (0.5 miles south-west) and The World's End pub (less than half a mile south). Little Chelsea’s nearest station is Imperial Wharf station, about 0.7 miles south. A little further out are Baynard's Castle (3.8 miles north-east) and Chelsea Stadium Tour And Museum (0.6 miles south-west). Open spaces near Little Chelsea include Campden Hill and WWT London Wetland Centre.
When to call us in Little Chelsea
Timber swells and shrinks with the weather. That movement opens up the mastic joint little by little.
These are the problems we’re asked about most:
- Mastic worn away on windows facing the weather
- Patchy fillers round a sash window
- Draughts and rain around sash boxes
- Silicone on a period window that looks wrong
Homes close to Church of St Andrew include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What your quote should include
- Are they insured?
- Who turns up on the day
- Whether all the old sealant comes out first
- What the quote includes, VAT included or not
Can I do it myself?
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.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
How the job changes by surface
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. Sand mastic is shaped by hand to suit.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
How the visit works
On the day, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work begins. Most jobs take a few hours for a single window, longer for several. In a London area like Little Chelsea, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Mention any leaks or damp you’ve noticed
- Clear the area around the work
Ask for a quote
We do not publish a price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, phone 0345 464 0079 or send us an email.