Greater London · England
Sand mastic for sash & case windows in Earl's Court, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Earl's Court and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps where the frame meets the masonry
- Crumbling sand mastic round a window
- Tired mastic found when preparing windows for paint
Earl's Court: your questions answered
Can you do sand mastic in Earl's Court?
Yes, Earl's Court is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Do you work for landlords with property near West Brompton station?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
Can you match the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The product needed can limit the range.
How long does sand mastic take to harden?
It skins over fairly quickly but takes longer to harden fully. We will tell you what to expect for your job.
Can I paint the new mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
How long does sand mastic take?
Most jobs take a few hours for a single window, longer for several, including preparation and clearing up. We’ll confirm how long when we quote.
Is the work guaranteed?
Every job comes with our 12-month guarantee.
Is there any odour?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Sand mastic in Earl's Court
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. Typical jobs include mastic worn away on windows facing the weather and mastic dropping out of the joint, on stone surrounds, sash and case windows and brick reveals.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Earl's Court is something to talk through when you book.
There’s a 12-month guarantee on every job.
- Place
- Earl's Court (W14, W8, SW5)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near Earl's Court
What else we do in Earl's Court
Looking after it afterwards
To keep the joints looking good and working properly:
- Don’t run silicone over sand mastic
- Check the mastic when you check the paintwork
- Avoid heavy scraping on the mastic joint
- Keep sills and gutters clear so water drains away
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Work for landlords, hotels and businesses
If you manage several properties in or around Earl's Court, several properties can be quoted together. Send us the addresses and the work at each.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
How the visit works
Most of a good job is in the preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours per window, depending on the condition of the joints. In Earl's Court, 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 the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Clear the area around the work
- Tell us if parking is tricky
- Tell us about any previous sealing or DIY attempts
How to get a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved and send you a clear quote.
Read more
Why act early in Earl's Court
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and finishes neatly against the masonry. 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.
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or send us an email and we will talk you through it.
Why book with us
- A 12-month guarantee on all work
- 4.9 on Google from 180+ five-star reviews
- Experience in homes, commercial sites and hotels
- Fully insured
Read our cost guide or customer reviews.
What the job involves on each surface
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
Stone surrounds
Old stone surrounds are often uneven, so the joint varies in width. We shape it by hand to follow the stone.
What sealant work cannot fix
New sealant cannot fix everything, and we will tell you before we start. It won’t solve:
- Masonry that needs repairing
- Whether work needs listed building consent
- Rotten sashes, sills or window boxes (a joiner’s job)
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly.
What we seal
- Tenement windows
- Period & listed homes
- Brick reveals
- Timber door frames
- Sash and case windows
- Stone surrounds
What affects the quote in Earl's Court
The price is agreed before any work begins. It’s based on:
- The size of the job
- When we can work, for business premises
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part.
What we need to know
When you contact us, these details help:
- The type of property
- Access, such as stairs, a lift or height
- Whether it has been sealed before
- Photos by email, if that’s easy
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 add pictures by email if you can.
Frames and glazing around Earl's Court
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Earl's Court is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. If you look after a building such as St Cuthbert with St Matthias CofE Primary School, larger buildings have plenty of frames, and the mastic around each one ages. For an older house near a landmark such as St Cuthbert's, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Earl's Court is about 1 mile south-east of Kensington, in Greater London. Homes, rented property, offices and hotels in Earl's Court can book us for sand mastic, old or new, large or small. Every job comes with our one-year guarantee. 764 places in Greater London are on our list, from the larger towns to small villages.
Jobs for sand mastic in W14, W8 and SW5 is quoted and booked the same way as anywhere else. If you need sand mastic at a property on Sun Road, Star Road and Rich Lane or a nearby road, our applicators can take on the job. You will find Earl's Court on the A3218 and A3220, which makes it straightforward to reach. If you are just outside Earl's Court, we cover West Brompton (1 mile south), South Kensington (1 mile east), Little Chelsea (1 mile south-east), World's End (1 mile south-east) and Walham Green (1 mile south). Further out, we also cover London (4 miles east), Marylebone (3 miles north-east), St Pancras (4 miles north-east), Shoreditch (6 miles north-east), Walthamstow (10 miles north-east) and Hoxton (6 miles north-east).
Near you in Earl's Court
Around Earl's Court, our work takes us to homes and buildings near Abdus Salam Library, Gwendwr Garden and Courtfield pub. You’ll also find The Fulham Boys School (less than half a mile west) and Collingham College (under half a mile east). There’s a railway station in Earl's Court itself: West Brompton station. Other landmarks nearby include Montfichet's Tower (4.4 miles east) and Kensington Arcade (0.7 miles north). For a walk, there’s Campden Hill and The Long Water.