Greater London · England
Window Mastic in Hadley Wood
Window and door frames in Hadley Wood need attention? We remove the old material, prepare the joints and seal them properly.
- Cracked or shrunken mastic around the frame
- Water coming in at the bottom corners of a door
- Sealant in the wrong colour for the frame
How we handle window mastic in Hadley Wood
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. Where the air is getting in through the window itself, we will say so. We are often asked to deal with draughts coming in around windows and doors and black, perished sealant on frames, across timber windows & doors, patio & French doors and composite doors.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease normally says who is responsible for the windows, so it’s worth checking before booking.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Where
- Hadley Wood (EN4, EN5)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Walk round the house once a year and look at the joints
- Keep jet washers away from the mastic
- Keep timber frames painted
- Clear any debris from frame drain holes
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Leaks normally show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
What we do, step by step
The work is kept neat and contained to the joints we’re treating, so you can get on with your day. The job usually takes a few hours for a handful of frames, longer for a whole house, and we tell you how long to leave it before we go. In Hadley Wood, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- Where gaps are deep, backing rod goes in first.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- On commercial sites, let us know about site rules
- Let us know about stairs, lifts or work at height
Ask for a quote
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or email us and describe the job and send photos if you have them.
Related advice
Hadley Wood homes and the weather
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Wyllyotts Manor (about 2.6 miles north) are a reminder that the area around Hadley Wood 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.
If you look after a building such as Livingstone Primary and Nursery School, its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as St Paul's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Hadley Wood is about 1 mile north-east of Barnet, in Greater London. Wherever you are in the EN4 postcode area, we cover window mastic for homes and businesses. Across Greater London, we cover 764 places, Hadley Wood among them. London is on our list too, about 12 miles from Hadley Wood.
Our applicators cover all of EN4 and EN5 for window mastic. If you need window mastic at a property on Hertford Road, Bartrams Lane and Parkgate Avenue or a nearby road, we can help. We also cover Cockfosters (1 mile south-east), Monken Hadley (1 mile west), New Barnet (1 mile south), Barnet (1 mile south-west) and Underhill (1 mile south-west). Larger places within reach include London (12 miles south), City of Westminster (10 miles south), Marylebone (10 miles south), Kensington (11 miles south), St Pancras (10 miles south) and Shoreditch (10 miles south-east).
Around Hadley Wood
Around Hadley Wood, our work takes us to homes and buildings near JCoSS, Trent School Cockfosters and The Hadley Hotel and the streets around them. The nearest railway station is Hadley Wood station, about 0.5 miles north. A little further out are Potters Bar Museum (2.5 miles north) and Spires Shopping Centre (1.4 miles west). For a walk, there’s Covert Way and Darland's Lake.
How we quote for window mastic
Call for a quick quote. The main things that affect it are:
- How easy the joints are to reach
- Whether old sealant or filler has to be cut out
- How many rooms, windows or areas are involved
- The product the joint needs
Leaving a failed joint usually makes the job bigger, not smaller. If you’re unsure, ring 0345 464 0079 or email us and we will give you an honest view and a quote.
Helping us quote
Before you ask for a quote, have a think about:
- If someone has resealed it before
- Photos by email, if that is easy
- Where the job is, and your postcode
- What’s wrong with the joints now
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand.
Your questions about window mastic in Hadley Wood
Is parking an issue for window mastic in Hadley Wood?
Parking in Hadley Wood, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Can you help a landlord with a rental near Hadley Wood station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Are you fully insured?
Yes. We’re fully insured for every job we do.
Is there any odour?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
How long will my window job take?
That depends on the number of frames, how they’re reached and the state of the old mastic. You will know the timing when we quote.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Do you do commercial work?
Yes, regularly. Larger jobs can be planned room by room or area by area.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
When something else is needed
In fairness, there are a few things sealant will not fix:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Rotten timber, which needs a joiner first
- Worn gaskets, brush seals or a door that has dropped
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- uPVC windows
- Timber windows & doors
- Composite doors
- Aluminium frames
- Patio & French doors
- Window sills
Signs you need window mastic in Hadley Wood
Frames are never completely still. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. If the sealant can’t stretch, it splits.
Signs it’s time to call us include:
- Whistling draughts around closed windows
- Draughty joints inside around the window
- Damp patches on the reveal after heavy rain
- White mastic on grey or black frames
Hadley Wood is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Before booking anyone
- How the surfaces are prepared before sealing
- Who does the work, and how experienced they are
- How hidden problems are handled
- The length of the guarantee
Landlord and commercial work in Hadley Wood
For anyone letting property in or around Hadley Wood, several properties can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.