Greater London · England
Window Mastic in London Fields
Our applicators work in London Fields on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- Cracked sealant at the sill ends
- Untidy mastic left by window fitters
- A bead that does not match the frame
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Window mastic in London Fields, done properly
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. We are often asked to deal with cracked or shrunken mastic around the frame and cracked sealant at the sill ends, across patio & French doors, window sills and composite doors.
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 London Fields as anywhere.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Where
- London Fields (E8, E2, E9)
- Wider area
- Greater London
- Cover
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We can talk through the options.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. We prepare and reseal every joint, backing the deep ones.
Common problems we fix in London Fields
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces never bonded as it should, so it comes away long before its time.
The most common problems we see are:
- Black, perished sealant on frames
- Gaps left after new windows were fitted
- Whistling draughts around closed windows
- Rain getting in at the frame or under the sill
For landlords with property near London Fields station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
What your quote should include
- When the joint can take water or movement
- How the colour is chosen
- How hidden problems are handled
- Which sealant they’ll use, and why
Why deal with it now?
Redecorating is a good moment to renew the mastic. A clean new bead makes new paint or render look finished, and it’s easier while the walls are being worked on anyway. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in London Fields.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part.
Why us?
- You choose the colour before work begins
- Every job guaranteed for a year
- Colour picked to suit the job
- Full insurance on every job
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Wipe condensation off the frames
- Check the mastic once a year
- Clean frames with a soft cloth and soapy water
- Repaint timber before it’s bare
Check the drainage slots in the frames aren’t blocked, so rain drains out rather than building up at the sealant.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
What happens on the day
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. It normally takes a morning for a couple of windows and a door. In a London area like London Fields, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Clear items away from the joints we’re working on
- Mention any sign-in or site rules at work premises
- Let us know if you’ve seen damp or leaks
Get a quote
Need a quote? Please phone 0345 464 0079 or send us an email with a few details. We will explain what we’d do and give you a clear quote before any work starts.
Advice
Landlords, agents and businesses in London Fields
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
For anyone letting property in or around London Fields, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
Common questions in London Fields
Do you cover London Fields for window mastic?
Yes, London Fields is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
Is parking an issue for window mastic in London Fields?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Can you match the sealant to my frames?
Normally, yes. Tell us the frame colour when you get in touch and we’ll use the nearest match.
Do you have insurance?
Yes, we are fully insured.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we are using and why.
Is the work guaranteed?
Yes. All our work carries a 12-month guarantee, and we’re ARBOMaster approved applicators.
Can new window sealant be painted?
That depends on the product. Some hybrid sealants can be painted; silicone cannot. Mention any painting plans before work begins.
How many windows can you do in a day?
The work takes anything from an hour or two to a full day, depending on how many frames there are. Access and how stubborn the old mastic is affect the time most.
Frames and glazing around London Fields
Historic houses like Sutton House (about 0.7 miles north-east) are a reminder that the area around London Fields 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.
In the older streets around Church of St Michael and All Angels, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For site and facilities teams at buildings such as Gayhurst Community School, its window and door frames need their mastic kept sound, just like a home’s.
London Fields is about 1 mile east of Hoxton, in Greater London. Whether you’re in the middle of London Fields or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our Greater London coverage runs to 764 places, and London Fields is one of them.
All of E8, E2 and E9 is covered for window mastic, from the main roads to the quietest streets. Whether your property is on Tudor Road, Forest Road and Duncan Road or a nearby road, we can help. Main roads around London Fields include the A1207, which makes travel easy. We also cover the places around London Fields: Hackney Central (1 mile north), Cambridge Heath (1 mile south-east), Dalston (1 mile north-west), Hackney (1 mile north-east) and Kingsland (1 mile north-west). Further out, we also cover London (3 miles south-west), City of Westminster (4 miles south-west), Marylebone (4 miles south-west), Kensington (7 miles south-west), St Pancras (3 miles west) and Walthamstow (4 miles north-east).
Near you in London Fields
Typical jobs here are in homes near The Urswick School, Haggerston Park and Bishopsgate Institute Special Collections and Archives. Nearby too are The Dolphin pub (under half a mile east) and The Urswick School - A Church of England Secondary School (less than half a mile north-east). London Fields has its own railway station: London Fields station. A little further out are German Hospital (0.6 miles north-west) and Hackney Walk (0.7 miles north-east). Open spaces near London Fields include Old Ford Island and Tower Hill.