Greater London · England
Sand Mastic in Earlsfield
Sand mastic for Earlsfield, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Silicone on a period window that looks wrong
- Draughty sash windows at the surround
- Cement or filler used on old window joints that has cracked
Do you need sand mastic in Earlsfield?
Rain on the window surround works into any crack and pushes it out. Exposed elevations generally fail first.
People normally contact us after spotting something like this:
- Draughty sash windows at the surround
- Modern sealant on a period surround
- Cracked mastic round a front door frame
- Mastic dropping out of the joint
Homes close to St John the Divine include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Before booking anyone
- When the joint can take water or movement
- Whether they seal over old material or remove it
- Whether VAT is included
- Which sealant they’ll use, and why
Sand mastic for homes and businesses in Earlsfield
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we’ll explain which is best for yours. We’re often asked to deal with cracked mastic round a front door frame and open joints round the window box, across brick reveals, stone surrounds and tenement windows.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in.
All our work is covered by a one-year guarantee.
- Place
- Earlsfield (SW18, SW17, SW19)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
What the job involves on each surface
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. The gap round it is pointed with sand mastic.
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. If your home is listed, ask your local planning authority about consent.
What sand mastic looks like in Earlsfield
With historic houses such as Fulham Palace (about 2.3 miles north-west) nearby, there’s older building stock in the area around Earlsfield as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Earlsfield is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you look after a building such as Beatrix Potter Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Earlsfield is about 2 miles north-east of Wimbledon, in Greater London. Jobs in Earlsfield get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 764 places across Greater London, from the larger towns to small villages.
Here we cover the SW18, SW17 and SW19 postcode area for sand mastic. Streets in the area include Burr Road, Acuba Road and Mount Road. Neighbouring places we cover for sand mastic include Southfields (1 mile north-west), Summerstown (1 mile south), Wandsworth (1 mile north), Tooting Bec (1 mile south-east) and Tooting (1 mile south-east). We also work in nearby towns such as London (5 miles north-east), City of Westminster (5 miles north), Marylebone (5 miles north), Kensington (4 miles north), St Pancras (6 miles north-east) and Shoreditch (7 miles north-east).
What’s near Earlsfield
Around Earlsfield, our work takes us to homes and buildings near Hillcroft School, Southfields Academy and Leather Bottle pub and the streets around them. Earlsfield has its own railway station: Earlsfield station. A little further out are Southside Wandsworth (0.8 miles north-west) and St James' Hospital (1 mile east). For a walk, there’s Battersea Park Lake and Wandle Meadow Nature Park.
What affects the quote in Earlsfield
Call for a quick quote. What matters most is:
- How much there is to do
- Whether there’s mould to deal with
- When we can work, for business premises
- The number of rooms or windows
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or send us an email.
Helping us quote
There’s no need for technical detail. Just tell us:
- How we’d reach the joints
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- Where the property is
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that is easy.
FAQs for Earlsfield
Is parking a problem for a job in Earlsfield?
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 Earlsfield station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
How long does sand mastic take to go off?
It takes a while. It skins first and hardens fully later, and we’ll tell you what to expect.
How long does sand mastic take?
Typically it takes a few hours per window, depending on the condition of the joints. Bigger jobs take longer.
Do I need permission for sand mastic on a listed building?
Speak to your local planning authority before work starts. Like-for-like sand mastic is often the preferred finish but the decision is theirs.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Honest limits
To be straight with you, there are a few things sealant won’t fix:
- Sash cords, weights and draught-proofing of the sashes
- Cracked or broken glass
- Damaged stone surrounds
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly before you book.
Where we work in Earlsfield
- Timber door frames
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Tenement windows
- Brick reveals
How it works
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to a full day, depending on how many windows and we leave things clean and tidy. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Before we arrive
- Mention any sign-in or site rules at work premises
- Clear the area around the work
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
For a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
Related advice
Towns and villages near Earlsfield
Also in Earlsfield
Keeping the joints in good condition
Looking after new joints is easy:
- Keep modern sealant off the mastic
- Leave the new mastic unpainted
- Renew mastic before redecorating the windows
- Check the mastic when you check the paintwork
Do not run silicone over the new mastic. If anything cracks, get it looked at before trying a quick fix.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.