Greater London · England
Window & door mastic in Seven Dials, Greater London
Window mastic in Seven Dials from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracked internal joints between frame and plaster
- Untidy mastic left by window fitters
- Leaking joints at the ends of sills
Questions from Seven Dials
Is parking a problem for a job in Seven Dials?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Do you cover Seven Dials for window mastic?
Yes, Seven Dials is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing, and we’ll send you a clear quote.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Do you take out the old sealant first?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Where do you work from?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
I rent my home. Can I book you?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
What should I tell you?
A short description and the location, plus pictures if you have them. If we need more, we will ask.
Can you quote for more than one area?
Yes. Just list everything you need and you’ll get one quote.
Window mastic in Seven Dials, done properly
Frames and walls do not move together. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. So the sealant has to stretch and recover, which is why we use a low-modulus product. We work on uPVC windows, composite doors and patio & French doors, and the jobs we see most are cold air getting in at the frame edge and cracked sealant at the sill ends.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Seven Dials as anywhere.
You get a one-year guarantee, the same in Seven Dials as everywhere else we work.
- Where
- Seven Dials (W1F, W1D, W1T)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
Window sills
Every drop off the glass ends up on the sill, so the sill ends and the joint under the frame are vital. They’re cut out and resealed with exterior sealant.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.
What happens if it’s left?
Draughts and leaks do not always mean new windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. If we find failed glass units or worn seals, we will tell you. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Seven Dials, the repair is bigger than a sealant job.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why us?
- Colour picked to suit the job
- An ARBOMaster approved applicator
- White, clear, grey or coloured to suit, where the product allows
- Homes, businesses and hotels
Take a look at what affects the cost or customer reviews.
For landlords and businesses
Landlords and agents in Seven Dials can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
What we are called out for in Seven Dials
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the masonry beside it stays put. A sealant that can’t keep up eventually tears.
Look out for any of the following:
- A bead that doesn’t match the frame
- Rushed sealant from a window installation
- Whistling draughts around closed windows
- Black, perished sealant on frames
For site and facilities teams at buildings such as St Josephs Catholic Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- What the quote includes, VAT included or not
- What preparation is included
- What guarantee comes with the work
- Which sealant they’ll use, and why
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Penetrating damp from a failed cavity tray or render
- A failed sealed unit that has misted up
- Broken hinges, locks or handles
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly.
Joints and surfaces we work on
- Composite doors
- Patio & French doors
- Aluminium frames
- Timber windows & doors
- Window sills
- uPVC windows
Also near Seven Dials
What else we do in Seven Dials
How it works
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes a few hours for a few frames, or a day or more for a whole house. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Seven Dials. It helps if you can point us to a visitor permit or a bay close to the door.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
Ask for a quote
If you are in Seven Dials and need window mastic, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Related advice
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Keep paint and stain on wooden frames in good order
- Paint up to the joint, not over it
- Look round the frames every year or so
- Don’t aim a pressure washer at the joints
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
Window mastic in Seven Dials: local notes
Historic houses like Benjamin Franklin House (about 0.4 miles south) are a reminder that the area around Seven Dials has older buildings as well as new. Where a home is older, 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
As a London address, Seven Dials can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Letting a property close to Tottenham Court Road station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Seven Dials is about 1 mile east of City of Westminster, in Greater London. Every kind of property in Seven Dials can book us for window mastic. The work is guaranteed for a year. Seven Dials is one of 764 towns and villages in Greater London where we work.
We cover every part of the W1F, W1D and W1T postcode area for window mastic and the streets around it. Whether your property is on Duck Lane, Drury Lane and Bridle Lane or a nearby road, our applicators can take on the job. Seven Dials sits on or near the A301 and A400, so getting to you is simple. We also cover St Giles (1 mile north), West End (1 mile west), Soho (1 mile west), Covent Garden (1 mile east) and Chinatown (1 mile south-west). Larger places within reach include Kensington (3 miles west), Walthamstow (7 miles north-east), Hampstead (4 miles north-west), Ruislip (13 miles west), Stockwell (3 miles south) and Orpington (13 miles south-east).
Near you in Seven Dials
We work in homes and buildings around London Nautical School, St Anne's Churchyard and LSE Shaw Library, among other places. You will also find Two Brewers pub (within half a mile south-west) and Mercers' School (0.8 miles east). There’s a railway station in Seven Dials itself: Tottenham Court Road station. Other landmarks nearby include Kingly Court (0.5 miles west) and St Paul's Hospital (less than half a mile north-east). Open spaces near Seven Dials include Barnsbury Wood and Ludgate Hill.