Greater London · England
Sand Mastic in East Ham
Specialist sand mastic for East Ham: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Wind and rain getting in round a sash window
- Old cement repairs round a window that have failed
- Window mastic to renew ahead of painting
Sand mastic in East Ham
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. We work on sash and case windows, timber door frames and brick reveals, and common reasons people get in touch are weathered mastic on the most exposed windows and cement or filler used on old window joints that has cracked.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, which is when draughts and damp patches appear in homes in East Ham.
Every job is covered by our 12-month guarantee, wherever you are in Greater London.
- Where
- East Ham (E6, IG11, E13, E12)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Frames and glazing around East Ham
Historic houses like Eastbury Manor House (about 1.9 miles east) are a reminder that the area around East Ham 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. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
Managing a site like St Michael's Catholic Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. Homes close to St Bartholomew's Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
East Ham is about 5 miles south-east of Walthamstow, in Greater London. Our applicators cover sand mastic for homes and businesses in East Ham. Across Greater London, we cover 764 places, and East Ham is one of them. We also work in London, around 7 miles away.
Every address in E6, IG11, E13 and E12 is covered for sand mastic. Whether your property is on High Street South, Market Street and High Street North or anywhere close by, we can help. East Ham sits on or near the A13 and A117, which makes travel easy. Neighbouring places we cover for sand mastic include Wallend (1 mile north-east), Upton Park (1 mile west), Plashet (1 mile north), Beckton (1 mile south-east) and Greengate (1 mile west). We also work in nearby towns such as London (7 miles west), City of Westminster (9 miles west), Marylebone (9 miles west), Kensington (11 miles west), St Pancras (7 miles west) and Shoreditch (6 miles west).
Local landmarks in East Ham
Locally, jobs take us to homes and businesses close to The Miller's Well pub, Beckton District Park and The Service for Deaf and Partially Hearing Children, among other places. East Ham’s nearest station is Barking station, roughly 1.3 miles north-east of the centre. Nearby you will also find Greenwich Castle (4.3 miles south-west) and Gallions Reach Shopping Park (1.6 miles south-east). Not far away are Ripple Nature Reserve and Hollow Pond.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Ask a joiner to look at soft timber first
- Go gently near the mastic when preparing windows
- Make sure water runs off the sill
- Leave the new mastic unpainted
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
Can I do it myself?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Nearby places to East Ham
Other services in East Ham
What happens on the day
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the work takes anything from a few hours to a full day, depending on how many windows in most cases. In East Ham, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
How to prepare
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Want a quote for sand mastic? Please ring 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and give you a clear price before any work starts.
Related advice
FAQs for East Ham
Is East Ham in your area for sand mastic?
Yes. We work across London and the South East, and East Ham is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Can you help a landlord with a rental near Barking station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
How long does sand mastic take to go off?
Not straight away. It skins first and hardens fully later and we will give you an idea for your job.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Can you seal over the old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
Which is right for my windows, sand mastic or modern sealant?
We will talk it through with you. Sand mastic suits many period homes and newer frames suit modern sealant.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
What happens if it’s left?
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall so renewing it early protects the window. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in East Ham.
Doing several joints on one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We’ll send you a clear quote for the lot.
Why book with us
- Tidy, careful work
- Arbo and Everbuild products
- 12-month guarantee on every job
- We never seal over old sealant
Read our cost guide or customer reviews.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Decayed frames that need repair
- Sashes that need overhauling
- Decisions on consent for listed homes
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Stone surrounds
- Tenement windows
- Timber door frames
- Brick reveals
- Period & listed homes
- Sash and case windows
What we are called out for in East Ham
Timber swells and shrinks with the weather. The movement cracks the mastic little by little.
Keep an eye out for any of the following:
- Modern sealant on a period surround
- Cement or filler used on old window joints that has cracked
- Gaps where the frame meets the masonry
- Mastic dropping out of the joint
Letting a property close to Barking station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
What to look for in a quote
- Is VAT in the price?
- What the cure time is
- How hidden problems are handled
- Which colour the sealant will be
Quotes for sand mastic in East Ham
The quote reflects the job in front of us. We take into account:
- Whether the work is at height
- How many areas need sealing
- Whether old sealant or filler has to be cut out
- The type of sealant required
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Helping us quote
Photos help, but a description is a good start. Please mention:
- If someone has resealed it before
- The problem you’ve noticed
- The type of property
- How many joints, rooms or windows are involved
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.