Greater London · England
Window & door mastic in North End, Greater London
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in North End. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Sealant in the wrong colour for the frame
- Cracked or shrunken mastic around the frame
- Cold air getting in at the frame edge
Frames and glazing around North End
Historic houses like Heath House (about 0.3 miles south) are a reminder that the area around North End has older buildings as well as new. Where a home is older, 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.
For landlords with property near Hampstead Heath station, renewing tired window mastic between tenants heads off draught and damp complaints. Homes close to Church of St Alban the Martyr include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as The King Alfred School, the mastic around its windows and doors needs looking after like any other building’s.
North End is about 1 mile north of Greenhill, in Greater London. We carry out window mastic for homes and businesses in North End and the surrounding area. Our Greater London coverage runs to 764 places, North End among them. There’s also a page for London, about 6 miles away.
All of NW3, NW11 and N2 is covered for window mastic, from the main roads to the quietest streets. We cover properties on Sandy Road, Park Avenue and Platt's Lane and the roads around them. With the A502 close by, North End is simple for us to get to for window mastic. Nearby, we also carry out window mastic in Vale of Health (1 mile south-east), Childs Hill (1 mile south-west), Golders Green (1 mile north-west), Greenhill (1 mile south) and West Hampstead (1 mile south). Within a short drive, we also cover London (6 miles south-east), City of Westminster (4 miles south), Marylebone (4 miles south-east), Kensington (5 miles south), St Pancras (4 miles south-east) and Shoreditch (5 miles south-east).
Landmarks near North End
Locally, jobs take us to homes and businesses close to The Old Bull and Bush pub, Childs Hill Park and The Henrietta Barnett School. For rail, the closest station is Hampstead Heath station, about 1.1 miles south-east. Well-known places in the area include O2 Centre (1.4 miles south) and New End Hospital (0.7 miles south). Open spaces near North End include Turner's Wood and Darland's Lake.
Window mastic in North End
Colour matters on a frame. We can seal in white, brown, anthracite grey, black or clear, so the line suits the frame instead of standing out. Common call-outs are for damp patches on the reveal after heavy rain and white mastic on grey or black frames, on composite doors, window sills and uPVC windows.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out, in North End as anywhere.
We stand behind the work with a 12-month guarantee.
- Place
- North End (NW3, NW11, N2)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Quotes for window mastic in North End
You’ll get a clear quote before we start. It takes into account:
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
- How easy the joints are to reach
- Which sealant suits the joint
Doing several joints on one visit usually makes better use of the time than several visits. You will get one clear quote for the whole job.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The rough size of the job
- What’s wrong with the joints now
- If someone has resealed it before
- A few photos by email, if you can
Want a quote for window mastic? Please call 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and give you a clear quote before work begins.
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too in North End and across Greater London. We can quote a run of properties together.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Why act early in North End
Resealing frames is a short job: the visit takes anything from an hour or two to a full day, depending on how many frames there are. Wait for damp to appear and there may be plaster and decorating to sort out too. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in North End, the repair is bigger than the sealant job would have been.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Why North End clients choose us
- 4.9 on Google from 180+ five-star reviews
- Homes, businesses and hotels
- Colour picked to suit the job
- We leave the area clean and tidy
What we do, step by step
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The work itself takes anything from an hour or two to a full day, depending on how many frames there are, including the tidy-up. In a London area like North End, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- 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.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
- Mention any tricky access
Get a quote
Every job is quoted individually. Simply call 0345 464 0079 or email us and describe the job and send photos if you have them.
Read more
FAQs for North End
Do you work for landlords with property near Hampstead Heath station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Is parking an issue for window mastic in North End?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
How long will my window job take?
A few frames take a few hours, while a whole house takes longer. You will get a timescale with the quote.
Do you work on first-floor windows?
Yes, where they can be reached safely. Tell us about access when you get in touch so we can plan the job.
Will there be a smell?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
Can you seal the gap between the frame and the plaster indoors?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
What should I tell you?
A short description and the location, plus pictures if you have them. We’ll ask anything else we need to know.
Can I do it myself?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.
When something else is needed
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Rotten timber, which needs a joiner first
- Worn gaskets, brush seals or a door that has dropped
- A sash or casement that will not close properly
If you are not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer.
Where we work in North End
- Aluminium frames
- Composite doors
- uPVC windows
- Window sills
- Patio & French doors
- Timber windows & doors
Also near North End
What else we do in North End
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Avoid blasting the frames with a pressure washer
- Wipe condensation off the frames
- Paint up to the joint, not over it
- Keep drainage slots and sill grooves clear
Try not to touch the new joint while it cures, following the cure time we give you. Keep jet washers away from the frames.
Water gets in quietly when mastic fails. You might not see it until plaster blows or a damp patch appears inside. Early resealing stops it reaching that point.