Greater London · England
Window Mastic in Edmonton
Specialist window mastic for Edmonton: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Cold air getting in at the frame edge
- Untidy mastic left by window fitters
- Mastic that is falling out in pieces
Window mastic in Edmonton, done properly
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. Common call-outs are for rushed sealant from a window installation and leaking joints at the ends of sills, on timber windows & doors, aluminium frames and uPVC windows.
London has a lot of flats and conversions, where windows are often on upper floors. Who looks after the outside of the frames can depend on the lease, so check that first.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Where
- Edmonton (N9, N18, N13, EN1)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Landlords, agents and businesses in Edmonton
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
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.
Nearby places to Edmonton
More services for Edmonton
Common questions in Edmonton
Can you help a landlord with a rental near Edmonton Green station?
Yes. We work for landlords and agents as well as householders, and several properties can be quoted together. You can phone 0345 464 0079 or email us with the details for a clear quote.
Can you do window mastic in Edmonton?
Yes, Edmonton is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we will send you a clear quote.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Are you fully insured?
Yes. We’re fully insured.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you.
Does the work come with a guarantee?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
Do you have sealant for grey or black windows?
Yes. White, brown, anthracite grey, black and clear sealants are all available, so the joint suits the frame.
Can you work on commercial sites?
Yes. We’ve worked for hotels, offices and other businesses.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Clear any debris from frame drain holes
- Check the mastic once a year
- Do not aim a pressure washer at the joints
- Repaint timber before it’s bare
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
How the job changes by surface
Window sills
Where a sill meets brick or render, the ends often crack first. We reseal them so rain cannot run into the wall.
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. If we find rot, we will tell you before going ahead, as a joiner will need to deal with it.
Common problems we fix in Edmonton
Sills take more water than any other part of a window, and the ends of the sill, where it meets the wall, are where it gets in. Failed sealant there lets rain into the wall or behind the frame.
Any of these means the joints need attention:
- Draughts coming in around windows and doors
- Untidy mastic left by window fitters
- Gaps where the sill meets the wall
- Black, perished sealant on frames
Edmonton is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Questions to ask before you book
- Is the old sealant removed completely?
- What happens if the job turns out different
- Who turns up on the day
- Whether the sealant suits the joint
Windows and doors in Edmonton
With historic houses such as Bruce Castle (about 1.8 miles south) nearby, there’s older building stock in the area around Edmonton as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to All Saints' Church include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in. Rented homes near Edmonton Green station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Edmonton is about 9 miles north-east of City of Westminster, in Greater London. From the centre of Edmonton to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 764 towns and villages across Greater London. London is on our list too, about 9 miles from Edmonton.
Here we cover the N9, N18, N13 and EN1 postcode area for window mastic. If you need window mastic at a property on The Broadway, Plevna Road and Galahad Road or a nearby road, we can help. Main roads around Edmonton include the B137 and B154. If you are just outside Edmonton, we cover Upper Edmonton (1 mile south), Picketts Lock (1 mile east), Northumberland Park (1 mile south), Ponders End (1 mile north-east) and Bush Hill Park (1 mile north-west). Further out, we also cover London (9 miles south), City of Westminster (9 miles south-west), Marylebone (8 miles south-west), Kensington (10 miles south-west), St Pancras (7 miles south) and Shoreditch (7 miles south).
Near you in Edmonton
Locally, jobs take us to homes and businesses close to NiW Furniture pub, The Latymer School and Starks Field School, among other places. There’s a railway station in Edmonton itself: Edmonton Green station. Nearby you will also find Edmonton Green Shopping Centre (under half a mile north-east) and North Middlesex University Hospital (1 mile south-west). The countryside around Edmonton includes Highams Park Lake and Ainslie Wood.
The process
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for a handful of frames, longer for a whole house, and the area is left clean. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Mention if the joints have been sealed before
- Tell us about any water getting in
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work before giving you a price.
Related advice
Quotes for window mastic in Edmonton
Jobs vary more than people expect. The main factors:
- When we can work, for business premises
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
- How easy the joints are to reach
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and agree the price before starting.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Access, such as stairs, a lift or height
- The address or postcode of the job
- The type of property
- Whether it has been sealed before
To get a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. We’ll give you a clear quote before any work starts.