Greater London · England
Sand Mastic in Homerton
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Homerton, backed by a one-year guarantee. Ask us for a quote.
- Mastic worn away on windows facing the weather
- Gaps round a timber door in stone or brick
- Gaps where the frame meets the masonry
Sand mastic for homes and businesses in Homerton
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted and we will advise if you’re redecorating. If you’re dealing with modern sealant on a period surround and crumbling sand mastic round a window, we can put it right.
London has a lot of flats and conversions, where windows are often on upper floors. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Homerton is something to talk through when you book.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Homerton (E5, E9, E8)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. It’s renewed by hand.
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
What affects the cost of sand mastic
Every job gets its own quote. These are the things that affect it:
- How many rooms, windows or areas are involved
- Which sealant suits the joint
- Access and height
- The amount of work
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first.
Asking for a quote
To help us quote quickly, please include:
- Access, such as stairs, a lift or height
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
- Photos by email, if that’s easy
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
For landlords and businesses
For anyone letting property in or around Homerton, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Aftercare tips
After the cure time, these simple habits help:
- Don’t run silicone over sand mastic
- Look over the window mastic once a year
- Sort the mastic before the decorators arrive
- Clear gutters so water doesn’t pour onto the windows
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look before trying a quick fix.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry so early renewal protects both.
Also in Homerton
Homerton questions
I let a flat near Homerton station. Can you help?
Yes, we work for landlords and agents. You can call 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.
Do you cover Homerton for sand mastic?
Yes. We work across London and the South East, and Homerton is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear quote.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Is sand mastic better than silicone for my windows?
It depends on the window. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
Where do you work from?
We’re based in Crawley, and we work across South East England, London and Scotland.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we will talk you through it.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
What is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
Why it’s worth doing now in Homerton
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. Converted houses in London often have a bathroom above someone else’s living room, 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 Homerton.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why Homerton customers choose us
- Old sealant always removed completely
- 4.9 on Google from 180+ five-star reviews
- Neat joints and a tidy finish
- ARBOMaster approved applicator
Take a look at our cost guide and our reviews.
When to call us in Homerton
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
Look out for these signs:
- Crumbling sand mastic round a window
- Gaps round a timber door in stone or brick
- Old cement repairs round a window that have failed
- Silicone on a period window that looks wrong
Homerton is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What to look for in a quote
- How the colour is chosen
- Who turns up on the day
- Whether VAT is included
- What preparation is included
Homerton homes and the weather
Historic houses like Sutton House (about 0.3 miles south-west) are a reminder that the area around Homerton has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Rushmore Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. Homes close to United Reformed Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Homerton is about 4 miles north-east of London, in Greater London. Across the E5 area, our applicators can take on sand mastic. 764 places in Greater London are on our list, large and small.
Postcode districts we cover here for sand mastic: E5, E9 and E8. We cover properties on Muir Road, Glyn Road and Rowe Lane. With the A107 and A1207 close by, Homerton is easy for our applicators to reach. If you’re just outside Homerton, we cover Lower Clapton (1 mile north), Hackney (1 mile south), Clapton (1 mile north-west), Lea Bridge (1 mile north) and Hackney Marshes (1 mile north-east). Larger places within reach include London (4 miles south-west), City of Westminster (5 miles south-west), Marylebone (5 miles south-west), Kensington (8 miles south-west), St Pancras (4 miles south-west) and Walthamstow (3 miles north-east).
Local landmarks in Homerton
Typical jobs here are in homes near Newcome's School, The Plough Inn and Millfields Park, among other places. There’s a railway station in Homerton itself: Homerton station. Well-known places in the area include Tower of London (3.3 miles south) and Clowns Gallery-Museum (1.2 miles south-west). Green spaces nearby include Hollow Pond and Tower Hill.
What happens on the day
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes anything from a few hours to a full day, depending on how many windows from start to finish. 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.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Plan for the work area to be out of bounds to pets and children
- Clear items away from the joints we’re working on
Ask for a quote
Getting a quote is simple: tell us what needs doing and where. Photos by email help us understand the job, and we will take it from there.