Greater London · England
Sand mastic for sash & case windows in Tower Hill, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Tower Hill, with a 12-month guarantee on every job. Ask us for a quote.
- Mastic dropping out of the joint
- Silicone on a period window that looks wrong
- Weathered mastic on the most exposed windows
What we can’t put right
It helps to know what we can’t do too:
- Cracked or broken glass
- Sashes that rattle, stick or will not open
- Timber that has rotted
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
What we seal
- Timber door frames
- Tenement windows
- Sash and case windows
- Stone surrounds
- Brick reveals
- Period & listed homes
Sand mastic for homes and businesses in Tower Hill
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. We work on brick reveals, sash and case windows and tenement windows, and common reasons people get in touch are crumbling sand mastic round a window and cracked mastic round a front door frame.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking, and access in Tower Hill is something to talk through when you book.
Each job carries a 12-month guarantee, large or small.
- Place
- Tower Hill (SE1, E1, E1W)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why it’s worth doing now in Tower Hill
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry so renewing it early protects the window. In a flat in Tower Hill, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you are not sure whether it needs doing, call 0345 464 0079 or email us and we will give you an honest view and a quote.
Why Tower Hill customers choose us
- 12-month guarantee on every job
- Approved under the ARBOMaster scheme
- 20+ years of sealant experience
- We never seal over old sealant
See our cost guide or customer reviews.
Common problems we fix in Tower Hill
Sand mastic slowly weathers. It hardens, cracks and starts to come away from the frame or the masonry.
It’s worth asking for a quote if you see:
- Old cement repairs round a window that have failed
- Mastic round period door frames that has failed
- Mastic worn away on windows facing the weather
- Silicone on a period window that looks wrong
Schools such as The Aldgate School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Before you book anyone
- Whether you can choose the colour
- When the joint can take water or movement
- Whether VAT is included
- The length of the guarantee
Questions from Tower Hill
Can parking be tricky for a visit in Tower Hill?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Can you help a landlord with a rental near London Fenchurch Street station?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will send you a clear quote.
Should I try DIY first?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
What exactly is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or send us an email.
Do you guarantee sand mastic work?
Our 12-month guarantee applies to all our work.
How do I get a quote for sand mastic in Tower Hill?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we’ll talk you through it.
Can I paint the new mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Can I do it myself?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Ask a joiner to look at soft timber first
- Look over the window mastic once a year
- Renew mastic before redecorating the windows
- Take care around the mastic when scraping paint
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look rather than patching it.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
Quotes for sand mastic in Tower Hill
The price is agreed before any work begins. It takes into account:
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
- The size of the job
- How many areas need sealing
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or send us an email and we’ll talk you through it.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- Whether it’s a home or a business
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
- A few pictures by email, if you can
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
What we do, step by step
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes anything from a few hours to a full day, depending on how many windows, including the tidy-up. For a job in Tower Hill, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you’re ready, ring 0345 464 0079 or send us an email.
Related advice
Nearby places to Tower Hill
Also in Tower Hill
What sand mastic looks like in Tower Hill
In a converted house or block, who looks after the windows depends on the lease, so check that before booking. Historic houses like Mansion House (about 0.6 miles north-west) are a reminder that the area around Tower Hill 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.
Rented homes near London Fenchurch Street station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. If you live in an older home near Church of St Peter ad Vincula, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Tower Hill is about 1 mile north-east of London, in Greater London. Whether you are in the middle of Tower Hill or further out, sand mastic is available for homes and businesses alike. Across Greater London, we cover 764 places, and Tower Hill is one of them.
Work in SE1, E1 and E1W works the same way as everywhere else we cover. Whether your property is on Bush Lane, Swan Lane and Mark Lane or anywhere close by, our applicators can take on the job. You’ll find Tower Hill on the A3 and A10, so it’s easy for us to get to. Neighbouring places we cover for sand mastic include Aldgate (1 mile north), Bishopsgate (1 mile north), Spitalfields (1 mile north), Whitechapel (1 mile north-east) and St George in the East (1 mile east). Further out, we also cover City of Westminster (3 miles west), Marylebone (3 miles west), Kensington (5 miles west), Walthamstow (6 miles north-east), Hampstead (5 miles north-west) and Ruislip (15 miles west).
Local landmarks in Tower Hill
Locally, jobs take us to homes and businesses close to Bishopsgate Institute Special Collections and Archives, The Liberty Bounds pub and Fund Academy and the streets around them. Other local landmarks include St Mary-at-Hill (within half a mile north-west), William Curtis Ecological Park (within half a mile south) and St Michael's Catholic College (0.7 miles south-east). Tower Hill has its own railway station: London Fenchurch Street station. Nearby you’ll also find Tower of London (less than half a mile east) and London Bridge Hospital (within half a mile south-west). The countryside around Tower Hill includes Lavender Pond and Ludgate Hill.