Greater London · England
Window Mastic in Charing Cross
Window mastic for Charing Cross and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Rain getting in at the frame or under the sill
- A bead that does not match the frame
- Gaps between the frame and the inside reveal
How we handle window mastic in Charing Cross
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through and quietens the whistle on windy days. If the draught is through the window seals instead, we will tell you. We work on aluminium frames, patio & French doors and uPVC windows, and common reasons people get in touch are cracked or shrunken mastic around the frame and mastic that’s falling out in pieces.
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, and access in Charing Cross is something to talk through when you book.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Charing Cross (W1F, W1D, W1S)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Clean frames with a soft cloth and soapy water
- Keep jet washers away from the mastic
- Repaint timber before it’s bare
- Ventilate rooms so frames do not stay wet inside
On timber frames, keep the paintwork in good order, because bare, wet timber moves more and pulls at the joint. Paint up to the joint, not over the silicone.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. A new joint closes it up.
Signs you need window mastic in Charing Cross
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar never bonded as it should, and it lets go sooner than it should.
Common reasons people contact us include:
- Mastic that has split away from the wall
- Mastic that is falling out in pieces
- Untidy mastic left by window fitters
- Whistling draughts around closed windows
If you live in an older home near St Martin-in-the-Fields, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- Who turns up on the day
- When the joint can take water or movement
- Which sealant they’ll use, and why
- The length of the guarantee
Common questions in Charing Cross
Can parking be tricky for a visit in Charing Cross?
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 Charing Cross for window mastic?
Yes. Our work covers London and the South East, and Charing Cross is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you when we finish.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned.
Can tenants book the work?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
Do you seal inside as well as outside?
Yes. Draughts often come through the inside gap too, so it can be worth sealing both.
Can new window sealant be painted?
Not usually, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
What the job involves on each surface
Window sills
Sills catch the water running down the glass, so the sill ends and the joint under the frame are vital. Each is cleaned out and resealed.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so a flexible sealant is essential. We seal onto sound, dry paintwork or timber.
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We cut it out and start again.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
How it works
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself generally takes a few hours for a handful of frames, longer for a whole house, depending on how much there is to do. In Charing Cross, as in most of London, parking needs a little planning. 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.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Keep children and pets away from the work area
- Clear items away from the joints we’re working on
- Try not to wet indoor joints just before the visit
Getting a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will talk you through the work and give you a clear price.
Related advice
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Broken hinges, locks or handles
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Draughts through the window seals rather than the frame
If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Where we work in Charing Cross
- Window sills
- Timber windows & doors
- uPVC windows
- Patio & French doors
- Composite doors
- Aluminium frames
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Also near Charing Cross
Other services in Charing Cross
Windows and doors in Charing Cross
With historic houses such as Benjamin Franklin House (about 0.1 miles east) nearby, there’s older building stock in the area around Charing Cross as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
As a London address, Charing Cross can be tricky for parking: let us know about parking bays, permits or a driveway. If you let a flat or house near London Charing Cross station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Charing Cross is about 1 mile south-east of City of Westminster, in Greater London. Anywhere in W1F, we cover window mastic for homes and businesses. Charing Cross is one of 764 places in Greater London where we work for window mastic.
Every address in W1F, W1D and W1S is within our area for window mastic, from the main roads to the quietest streets. You’ll find streets such as Duck Lane, Drury Lane and Bridle Lane, and we cover them all. Charing Cross sits on or near the A4 and A301, so getting to you is simple. Other places close to Charing Cross include St James's (1 mile west), Adelphi (1 mile north-east), Chinatown (1 mile north-west), West End (1 mile north) and Covent Garden (1 mile north-east). Larger places within reach include Kensington (3 miles west), Walthamstow (7 miles north-east), Hoxton (3 miles north-east), Whitechapel (3 miles east), Hampstead (4 miles north-west) and Ruislip (13 miles west).
What’s near Charing Cross
Typical jobs here are in homes near Westminster Abbey Choir School, Silver Cross Tavern and Harris Westminster Sixth Form and the streets around them. Also close by are London Library (under half a mile west) and Victoria Embankment Gardens (under half a mile east). There’s a railway station in Charing Cross itself: London Charing Cross station. Well-known places in the area include Montfichet's Tower (1.2 miles east) and Royal United Services Institute (less than half a mile south). Not far away are Barnsbury Wood and St. James's Park Lake.