Greater London · England
Sand Mastic in Rotherhithe
Sand mastic in Rotherhithe from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Silicone on a period window that looks wrong
- Cement or filler used on old window joints that has cracked
- Crumbling sand mastic round a window
Keeping the joints in good condition
So the new joints stay in good condition:
- Keep sills and gutters clear so water drains away
- Leave the new mastic unpainted
- Find out about consent before window work on a listed home
- Avoid heavy scraping on the mastic joint
Don’t run silicone over the new mastic. If you see a crack, ask us to take a look before trying a quick fix.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
Sand mastic in Rotherhithe
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. Typical jobs include cracked mastic round a front door frame and gaps where the frame meets the masonry, across brick reveals, stone surrounds and period & listed homes.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Rotherhithe as anywhere.
All of our work is guaranteed for twelve months, in Rotherhithe and everywhere else we cover.
- Location
- Rotherhithe (SE16, SE8, E1W)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How the job changes by surface
Tenement and terrace windows
Upper-floor windows need access planning. Let us know the floor and we will confirm access.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
Questions from Rotherhithe
Is parking a problem for a job in Rotherhithe?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Do you cover Rotherhithe for sand mastic?
Yes. Our work covers London and the South East, and Rotherhithe is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
What is sand mastic?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you don’t need to watch us work.
How long does sand mastic take to harden?
It takes a while. The skin forms first, and the full set comes later and we will give you an idea for your job.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints.
Common problems we fix in Rotherhithe
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint.
People generally contact us after spotting one of these:
- Silicone on a period window that looks wrong
- Gaps round a timber door in stone or brick
- Old sand mastic that has cracked, crumbled or fallen out
- Tired mastic found when preparing windows for paint
For landlords with property near Canada Water station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
What your quote should include
- Whether they’re fully insured
- What preparation is included
- Is the old sealant removed completely?
- What happens if they find a problem under the old sealant
What sand mastic looks like in Rotherhithe
In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking. With historic houses such as Queen's House (about 2.1 miles south-east) nearby, there’s older building stock in the area around Rotherhithe as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Holy Trinity Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like Alfred Salter Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Rotherhithe is about 2 miles south-east of Whitechapel, in Greater London. Jobs in Rotherhithe get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Rotherhithe is one of 764 places in Greater London where we work for sand mastic.
Work in SE16, SE8 and E1W is quoted and booked the same way as anywhere else. Whether your property is on Bush Road, Gomm Road and Swan Road or anywhere close by, we can help. Main roads around Rotherhithe include the A200, which makes travel easy. If you’re just outside Rotherhithe, we cover Surrey Quays (1 mile south), Surrey Canal (1 mile south), South Bermondsey (1 mile south-west), Millwall (1 mile south-east) and North Greenwich (1 mile south-east). Within a short drive, we also cover City of Westminster (5 miles west), Marylebone (5 miles west), Kensington (7 miles west), St Pancras (4 miles north-west), Walthamstow (6 miles north) and Hoxton (3 miles north-west).
Local landmarks in Rotherhithe
Typical jobs here are in homes near The Ship York pub, Bacon's College and Russia Dock Woodland, among other places. There’s a railway station in Rotherhithe itself: Canada Water station. A little further out are St Olave's Hospital (0.5 miles west) and Tower of London (1.6 miles north-west). Open spaces near Rotherhithe include St. James's Park Lake and Tower Hill.
The process
Once we’re on site, we check the joints match what you told us. 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. In a London area like Rotherhithe, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
For sand mastic in Rotherhithe, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before work begins.
Advice
Towns and villages near Rotherhithe
Also in Rotherhithe
What affects the quote in Rotherhithe
You’ll get a clear quote before work begins. It takes into account:
- Access and height
- The number of rooms or windows
- The size of the job
- When we can work, for business premises
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Helping us quote
What to tell us when you ask for a quote:
- What’s wrong with the joints now
- A few photos by email, if you can
- Where the job is, and your postcode
- Whether it has been sealed before
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.
When something else is needed
We’ll always be straight with you, so here’s what new sealant won’t do:
- Decisions on consent for listed homes
- Sash cords, weights and draught-proofing of the sashes
- 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.
Where we work in Rotherhithe
- Sash and case windows
- Stone surrounds
- Tenement windows
- Period & listed homes
- Timber door frames
- Brick reveals
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. 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.