Greater London · England
Upper Edmonton Window Mastic
Mastic around window and door frames, sills and patio doors for Upper Edmonton, backed by a one-year guarantee. Call for a quick quote.
- Cracked or shrunken mastic around the frame
- Gaps left after new windows were fitted
- Leaking joints at the ends of sills
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
Window mastic for homes and businesses in Upper Edmonton
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. Our applicators cut it out and replace it with a flexible, weatherproof sealant. We’re often asked to deal with rushed sealant from a window installation and mastic that’s falling out in pieces, across patio & French doors, uPVC windows and timber windows & doors.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, letting in draughts and water.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Upper Edmonton (N18, N9, N17)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Upper Edmonton homes and the weather
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. Historic houses like Bruce Castle (about 1.1 miles south) are a reminder that the area around Upper Edmonton 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.
Managing a site like St John and St James CofE Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. If you let a flat or house near Silver Street station, renewing tired window mastic between tenants heads off draught and damp complaints.
Upper Edmonton is about 1 mile south of Edmonton, in Greater London. Across the N18 area, our applicators can take on window mastic. Our Greater London coverage runs to 764 places, Upper Edmonton among them. You can also see our page for London, about 8 miles away.
Every address in N18, N9 and N17 is covered for window mastic. If you need window mastic at a property on Bull Lane, Park Lane and York Road or a nearby road, our applicators can take on the job. We also cover the places around Upper Edmonton: Northumberland Park (1 mile south-east), Edmonton (1 mile north), Picketts Lock (2 miles north-east), South Chingford (2 miles east) and Winchmore Hill (2 miles north-west). Within a short drive, we also cover London (8 miles south), City of Westminster (8 miles south-west), Marylebone (8 miles south-west), Kensington (10 miles south-west), St Pancras (6 miles south) and Shoreditch (6 miles south).
Around Upper Edmonton
Typical jobs here are in homes near Pymmes Park, Tottenham University Technical College and London Academy of Excellence Tottenham and the streets around them. Upper Edmonton has its own railway station: Silver Street station. A little further out are North Middlesex University Hospital (less than half a mile west) and Broomfield House Museum (2.2 miles west). For a walk, there’s Pole Hill and Highams Park Lake.
Common questions in Upper Edmonton
I let a flat near Silver Street station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Do you cover Upper Edmonton for window mastic?
Yes, Upper Edmonton is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job.
Do you remove the old sealant?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
How much does window mastic cost in Upper Edmonton?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Is the new sealant paintable?
It depends on the sealant. Silicone isn’t paintable, but some hybrid sealants are. Mention any painting plans before any work starts.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we’re using.
Is the work guaranteed?
Yes. Our 12-month guarantee covers every job.
Why act early in Upper Edmonton
The work is quick compared with the damage it prevents: it takes most of a day for a typical house, less for a few frames. Wait for damp to appear and there may be plaster and decorating to sort out too. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Upper Edmonton, the repair is bigger than the sealant job would have been.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
Why Upper Edmonton clients choose us
- We agree the colour with you first
- Old sealant always removed completely
- 12-month guarantee on every job
- Quality sealants from Arbo and Everbuild
See how sealant jobs are priced and our reviews.
Surface by surface
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.
Composite doors
Draughts round the door leaf usually come from worn seals or adjustment, not the mastic. We’ll tell you if that’s what we find.
What we are called out for in Upper Edmonton
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
Common reasons people contact us include:
- Draughty joints inside around the window
- Leaking joints at the ends of sills
- Rain getting in at the frame or under the sill
- Mastic that’s falling out in pieces
As a London address, Upper Edmonton can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- What product goes in the joint
- How the surfaces are prepared before sealing
- What happens if they find a problem under the old sealant
- Who does the work, and how experienced they are
How we quote for window mastic
Call for a quick quote. What matters most is:
- Whether the work is at height
- The type of sealant required
- How many rooms, windows or areas are involved
- Mould in or behind the old joints
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- A few pictures by email, if you can
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
- How we’d reach the joints
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, phone 0345 464 0079 or email us.
How it works
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a handful of frames, longer for a whole house. 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.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, 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.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about earlier repairs to the joints
- For business premises, tell us about site rules or sign-in
Get a quote
Need a quote? Please call 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and send you a clear quote before work begins.
Advice
Nearby places to Upper Edmonton
Also in Upper Edmonton
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs 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.