Greater London · England
Sand mastic for sash & case windows in West Hackney, Greater London
Professional sand mastic in and around West Hackney, with every bit of old sealant taken out first.
- Modern sealant on a period surround
- Failed mastic on an exposed elevation
- Crumbling sand mastic round a window
Sand mastic in West Hackney, done properly
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. If you have draughty sash windows at the surround and mastic round period door frames that has failed, we can put it right, whatever the surface.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease normally says who is responsible for the windows, so it’s worth checking before booking.
All our work comes with our one-year guarantee.
- Where
- West Hackney (N16, E5, E8)
- Region
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Why deal with it now?
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic is the like-for-like choice and that can be important for listed homes. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in West Hackney, the repair is bigger than a sealant job.
Doing several joints on one visit is normally more efficient than separate visits. You’ll get one clear quote for the whole job.
What you get with us
- Arbo and Everbuild products
- 180+ five-star Google reviews
- Tidy, careful work
- ARBOMaster approved applicator
Your questions about sand mastic in West Hackney
Is parking a problem for a job in West Hackney?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
Can you help a landlord with a rental near Rectory Road station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Can I add another job to the visit?
Yes. Just list everything you need.
Are you ARBOMaster approved?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Should I check with the council before work on a listed or conservation-area home?
Your local planning authority is the one to ask. They decide whether consent is needed.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Are you insured?
Yes. Mr Mastic is fully insured.
How long does the job take?
A typical job takes anything from a few hours to a full day, depending on how many windows, including the preparation. Your quote will say how long we expect yours to take.
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Have rotten timber repaired before new mastic goes in
- Inspect the joints round the windows every year or so
- Ask the planning authority about consent for listed or conservation-area homes
- Ask us before painting near the mastic
Do not touch or press the mastic while it hardens. It skins over quickly, but takes longer to harden fully.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
The process
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before any work begins. Most jobs take anything from a few hours to a full day, depending on how many windows. In a London area like West Hackney, 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 the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Keep children and pets away from the work area
- Tell us if parking is tricky
Ask for a quote
We don’t publish a price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or email us.
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For landlords and businesses
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
What sand mastic looks like in West Hackney
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Sutton House (about 1.2 miles south-east) nearby, there’s older building stock in the area around West Hackney as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Managing a site like Benthal Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Rectory Road station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
West Hackney is about 4 miles north of London, in Greater London. If you need sand mastic in West Hackney, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We’re based in Crawley and cover Greater London. Our area takes in 764 places across Greater London.
All of N16, E5 and E8 is within our area for sand mastic, from the main roads to the quietest streets. Local streets include Muir Road, Burma Road and Piano Lane, all of which we cover. With the A107 close by, West Hackney is simple for us to get to. If you are just outside West Hackney, we cover Shacklewell (1 mile south), Stoke Newington (1 mile west), Clapton (1 mile east), Stamford Hill (1 mile north) and Upper Clapton (1 mile north-east). Larger places within reach include London (4 miles south), City of Westminster (5 miles south-west), Marylebone (4 miles south-west), Kensington (7 miles south-west), St Pancras (3 miles south-west) and Walthamstow (3 miles north-east).
Near you in West Hackney
In West Hackney, that means homes and buildings near The Coach And Horses Public House, Tawhid Boys School and Stoke Newington Common and the streets around them. Nearby too are Church of St Andrew (0.8 miles north-west) and The Petchey Academy (0.5 miles south). There’s a railway station in West Hackney itself: Rectory Road station. Nearby you will also find Montfichet's Tower (3.5 miles south-west) and Clowns Gallery-Museum (1.1 miles south). Green spaces nearby include Woodberry Wetlands and Hollow Pond.
Signs you need sand mastic in West Hackney
Timber frames move with the seasons. That movement opens up the mastic joint little by little.
Most people get in touch when they notice something like this:
- Mastic round period door frames that has failed
- Modern sealant on a period surround
- Gaps where the frame meets the masonry
- Weathered mastic on the most exposed windows
As a London address, West Hackney can be tricky for parking: let us know about parking bays, permits or a driveway.
Questions to ask before you book
- What happens if they find a problem under the old sealant
- How the joint is cleaned and prepared
- Which colour the sealant will be
- Whether they seal over old material or remove it
What the job involves on each surface
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we will confirm what’s needed.