Greater London · England
Isle of Dogs Sand Mastic
We cover Isle of Dogs for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Tired mastic found when preparing windows for paint
- A silicone bead on a sash window that spoils the look
- Old cement repairs round a window that have failed
When something else is needed
Sealant is not the answer to every problem, and we will tell you before any work starts. Sealant will not put right:
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
- Whether work needs listed building consent
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
Surfaces we seal
- Timber door frames
- Tenement windows
- Period & listed homes
- Brick reveals
- Sash and case windows
- Stone surrounds
About our sand mastic in Isle of Dogs
We work across Isle of Dogs renewing sand mastic on sash windows and doors. Every joint is cleaned out and filled by hand, finished to suit the masonry. Typical jobs include modern sealant on a period surround and cracked mastic round a front door frame, on brick reveals, stone surrounds and tenement windows.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, letting in draughts and water.
You get a 12-month guarantee, the same in Isle of Dogs as everywhere else we work.
- Location
- Isle of Dogs (E14, SE8, SE10)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
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.
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Common problems we fix in Isle of Dogs
Paint, silicone or cement used over old mastic causes problems. They don’t move with the timber, and they normally need raking out.
The most common problems we see are:
- Crumbling sand mastic round a window
- Patchy fillers round a sash window
- A silicone bead on a sash window that spoils the look
- Mastic round period door frames that has failed
If you let a flat or house near Greenwich station, any sash windows need sound mastic to keep draughts and rain out.
What your quote should include
- How long to leave it before use
- How long the guarantee is
- Is the old sealant removed completely?
- What happens if they find a problem under the old sealant
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
We work for landlords and agents as well as householders. Sealant work between tenants keeps a property looking cared for.
Questions from Isle of Dogs
Is parking a problem for a job in Isle of Dogs?
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.
Can you do sand mastic in Isle of Dogs?
Yes, Isle of Dogs is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and we clear up when we’re done.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme.
Are you insured?
Yes. We are fully insured.
Can old silicone round a sash window be swapped for sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic can sit properly.
Isle of Dogs homes and the weather
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. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking.
As a London address, Isle of Dogs can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Schools such as Harbinger Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Isle of Dogs is about 1 mile north-west of Greenwich, in Greater London. From the centre of Isle of Dogs to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Isle of Dogs is one of 764 places in Greater London where we work.
Here we cover the E14, SE8 and SE10 postcode area for sand mastic. We cover properties on Creek Road, Wynan Road and Undine Road and the roads around them. Nearby, we also carry out sand mastic in North Greenwich (1 mile north-west), Millwall (1 mile west), Cubitt Town (1 mile north-east), Deptford (1 mile south-west) and Greenwich (1 mile south-east). We also work in nearby towns such as London (3 miles west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (5 miles north-west) and Shoreditch (4 miles north-west).
Local landmarks in Isle of Dogs
We work in homes and buildings around The Ferry House Public House, Laban Centre and St. Paul's and the streets around them. Also close by are Mudchute Park and Farm (less than half a mile north-east) and Canary Wharf College 3 (less than half a mile north). Isle of Dogs’s nearest station is Greenwich station, about 0.7 miles south. Nearby you will also find Greenwich Castle (1 mile south-east) and Surrey Quays Shopping Centre (1.3 miles west). Not far away are Tower Hill and Sue Godfrey Nature Park.
How the visit works
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours per window, depending on the condition of the joints. In Isle of Dogs, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Mention any leaks or damp you’ve noticed
- Let us know about stairs, lifts or work at height
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
Can I do it myself?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Also near Isle of Dogs
Other services in Isle of Dogs
How we quote for sand mastic
You will get a clear quote before we start. It takes into account:
- How easy the joints are to reach
- The type of sealant required
- The size of the job
- Working hours on commercial sites
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What we need to know
Before you ask for a quote, have a think about:
- Photos by email, if that’s easy
- Access, such as stairs, a lift or height
- If it’s domestic, commercial or a hotel
- Where the property is
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.