Greater London · England
Sand Mastic in St George in the East
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in St George in the East and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Old sand mastic that has cracked, crumbled or fallen out
- Tired mastic found when preparing windows for paint
- Draughts and rain around sash boxes
About our sand mastic in St George in the East
Silicone on a period window often looks wrong and is not always the right material. Sand mastic is the traditional choice and we can swap the silicone for it. If you’re dealing with mastic dropping out of the joint and wind and rain getting in round a sash window, we can put it right.
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, in St George in the East as anywhere.
There’s a 12-month guarantee on every job, large or small.
- Where
- St George in the East (E1, E1W, SE16)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we can’t put right
To be straight with you, there are a few things sealant will not fix:
- Whether work needs listed building consent
- Sashes that rattle, stick or won’t open
- Damaged stone surrounds
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
Joints and surfaces we work on
- Brick reveals
- Timber door frames
- Stone surrounds
- Sash and case windows
- Period & listed homes
- Tenement windows
Different surfaces, different methods
Stone surrounds
The stone is treated with care when the old mastic comes out.
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.
St George in the East questions
Do you cover St George in the East for sand mastic?
Yes, St George in the East is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
Is parking an issue for sand mastic in St George in the East?
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.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
How long does sand mastic take?
Typically it takes a few hours for a single window, longer for several. Larger jobs naturally take longer, and we will tell you how long to expect.
How long does sand mastic take to harden?
It takes a while. It skins first and hardens fully later and we will give you an idea for your job.
Can you match the sealant colour?
We will suggest a colour to suit the surroundings. The choice depends on the product the joint needs.
Where are you based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
What happens on the day
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to a full day, depending on how many windows. For a job in St George in the East, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- 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.
How to prepare
- Let us know if you’ve seen damp or leaks
- For business premises, tell us about site rules or sign-in
- For indoor joints, keep the area dry beforehand if you can
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Related advice
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Ask the planning authority about consent for listed or conservation-area homes
- Ask us before painting near the mastic
- Plan mastic work ahead of painting
- Inspect the joints round the windows every year or so
Do not touch or press the mastic while it hardens. It skins over quickly, but takes longer to harden fully.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger as more mastic falls out.
What affects the cost of sand mastic
The price is agreed before any work begins. It’s based on:
- Access and height
- When we can work, for business premises
- Any mould that needs treating
- The size of the job
The cost depends on the amount of work, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Asking for a quote
To make quoting easier, let us know:
- Where the property is
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
- Whether it’s a home or a business
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To get started, phone 0345 464 0079 or email us.
Places near St George in the East
What else we do in St George in the East
Sand mastic in St George in the East: local notes
In a converted house or block, who looks after the windows depends on the lease, so check that before you book. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as St Paul's Whitechapel Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages. As a London address, St George in the East can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. In the older streets around St Peter's, the joint between an old wall and a newer frame is generally the first place rain gets in.
St George in the East is about 1 mile south-east of Whitechapel, in Greater London. If you need sand mastic in St George in the East, it’s easy to get a quote: please call 0345 464 0079 or email us. We cover Greater London from our Crawley base, St George in the East included. St George in the East is one of 764 towns and villages in Greater London we cover for sand mastic.
All of E1, E1W and SE16 is within our area for sand mastic. You’ll find streets such as Glamis Road, Redmead Lane and Wapping Lane, all of which we cover. You will find St George in the East on the A1210 and A1211, which makes it straightforward to reach. If you’re just outside St George in the East, we cover Wapping (1 mile south-east), East End of London (1 mile north-east), Whitechapel (1 mile north-west), Tower Hill (1 mile west) and Shadwell (1 mile east). Larger places within reach include City of Westminster (4 miles west), Marylebone (4 miles west), Kensington (6 miles west), St Pancras (3 miles north-west), Walthamstow (6 miles north) and Hampstead (6 miles north-west).
Near you in St George in the East
Locally, jobs take us to homes and businesses close to St Mellitus College, Mulberry School for Girls and Bishopsgate Institute Special Collections and Archives. Other local landmarks include Town of Ramsgate pub (under half a mile south), William Curtis Ecological Park (0.7 miles west) and St Mary-at-Hill (0.9 miles west). There’s a railway station in St George in the East itself: Shadwell station. Other landmarks nearby include Jack the Ripper Museum (less than half a mile north-west) and The Royal London Hospital (0.7 miles north). Not far away are St. James's Park Lake and Tower Hill.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
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.