Greater London · England
Donnybrook Quarter Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Donnybrook Quarter, with a 12-month guarantee on every job. Call for a quick quote.
- Gaps where the frame meets the masonry
- Window mastic to renew ahead of painting
- Failed mastic on an exposed elevation
What happens on the day
Before we leave, we go over the finished joints with you and tell you how long to leave it. The visit itself normally takes a few hours per window, depending on the condition of the joints, depending on the size of the job. In a London area like Donnybrook Quarter, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic isn’t too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
How to prepare
- Mention any parking rules near the property
- Tell us about access, such as stairs, a lift or high-level joints
- For business premises, tell us about site rules or sign-in
Ask for a quote
Every job is quoted individually, so start by telling us what you need. Simply ring 0345 464 0079 or email us and describe the job.
Advice
About our sand mastic in Donnybrook Quarter
Silicone on a period window often looks wrong and is not always the right material. Sand mastic is the traditional choice, and we can replace one with the other. If you have window mastic to renew ahead of painting and old cement repairs round a window that have failed, we can put it right, on tenement windows, sash and case windows and stone surrounds alike.
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 Donnybrook Quarter as anywhere.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- Donnybrook Quarter (E3, E9, E20)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Donnybrook Quarter
What else we do in Donnybrook Quarter
Should I try it myself first?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
How the job changes by surface
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
Stone surrounds
We take care not to mark the stone when the old mastic comes out.
Keeping the joints in good condition
So the new joints stay in good condition:
- Do not run silicone over sand mastic
- Go gently near the mastic when preparing windows
- Plan mastic work ahead of painting
- Check the mastic when you check the paintwork
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
Donnybrook Quarter: your questions answered
Can parking be tricky for a visit in Donnybrook Quarter?
Parking in Donnybrook Quarter, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
I let a flat near Hackney Wick station. Can you help?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Will it make a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
Can you seal over the old sealant?
No, it won’t last. It can look neat for a few weeks, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Can you match the sealant colour?
Most of the time, yes. We will tell you which colours the right product comes in.
What’s sand mastic made of?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Landlords, agents and businesses in Donnybrook Quarter
We work for landlords and agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Why it’s worth doing now in Donnybrook Quarter
An open joint round the frame lets weather in. Water can get to the frame and the masonry, so dealing with it now protects both. In a flat in Donnybrook Quarter, 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.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
Why choose Mr Mastic in Donnybrook Quarter
- 180+ five-star Google reviews
- Homes, businesses and hotels
- Trusted Arbo and Everbuild sealants
- We are fully insured
See our cost guide and our reviews.
What sand mastic looks like in Donnybrook Quarter
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Sutton House (about 1.3 miles north-west) are a reminder that the area around Donnybrook Quarter 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.
For an older house near a landmark such as St Paul Old Ford, the joint between an old wall and a newer frame is usually the first place rain gets in. As a London address, Donnybrook Quarter can be tricky for parking: let us know about parking bays, permits or a driveway.
Donnybrook Quarter is about 1 mile west of Stratford, in Greater London. For sand mastic in and around Donnybrook Quarter, it’s easy to get a quote: please ring 0345 464 0079 or email us. We’re based in Crawley and cover Greater London. Across Greater London, we cover 764 places, and Donnybrook Quarter is one of them.
Postcode districts we cover here for sand mastic: E3, E9 and E20. Local streets include Lyal Road, Wick Lane and Dace Road, and we cover them all. If you’re just outside Donnybrook Quarter, we cover Old Ford (1 mile east), Fish Island (1 mile north-east), Bow (1 mile south), Hackney Wick (1 mile north-east) and Mile End (1 mile south). Larger places within reach include London (4 miles south-west), City of Westminster (6 miles west), Marylebone (5 miles west), Kensington (8 miles west), St Pancras (4 miles west) and Walthamstow (4 miles north).
Landmarks near Donnybrook Quarter
We work in homes and buildings around Mulberry UTC, The Lea Tavern and Mulberry UTC. Donnybrook Quarter’s nearest station is Hackney Wick station, roughly 0.5 miles north. Other landmarks nearby include St Clement's Hospital (0.7 miles south) and V&A East (0.8 miles north-east). For a walk, there’s Tower Hill and Hollow Pond.
When to call us in Donnybrook Quarter
Age is the main cause. Even well-laid mastic needs renewing in time and how long it lasts depends on the weather it faces.
Any of these means the joints need attention:
- Wind and rain getting in round a sash window
- Mastic round period door frames that has failed
- Patchy fillers round a sash window
- Gaps between timber frames and stone or brick
Rented homes near Hackney Wick station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Comparing quotes
- What preparation is included
- How the colour is chosen
- The length of the guarantee
- Are they insured?