Greater London · England
Bedfont Window Mastic
Mastic around window and door frames, sills and patio doors for Bedfont, backed by a one-year guarantee. Ask us for a quote.
- A bead that does not match the frame
- Hard, cracked sealant around windows
- Cracked sealant at the sill ends
Why it’s worth doing now in Bedfont
Failed mastic is not a reason to replace sound windows. Where the frames are sound, new mastic generally deals with draughts and leaks at the edges. Problems with the glass or gaskets are for a window company, and we’ll say so. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
Why us?
- Homes, businesses and hotels
- Quality sealants from Arbo and Everbuild
- Sealant colour chosen to suit
- White, clear, grey or coloured to suit, where the product allows
Take a look at how sealant jobs are priced and customer reviews.
About our window mastic in Bedfont
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. If you have black, perished sealant on frames and damp patches on the reveal after heavy rain, we can help.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
There’s a 12-month guarantee on every job.
- Location
- Bedfont (TW14, TW6, TW13)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How the job changes by surface
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. We seal onto sound, dry paintwork or timber.
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. We cut it out, back any deep gaps and reseal properly.
Should I try it myself first?
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.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How we quote for window mastic
For a quick quote, just ask. What matters most is:
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
- Whether the work is at height
- Whether there’s mould to deal with
Combining jobs into one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
What to tell us for a quote
What to tell us when you ask for a quote:
- The problem you’ve noticed
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
- The address or postcode of the job
For a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before any work starts.
What else we do in Bedfont
Questions from Bedfont
Can you do window mastic in Bedfont?
Yes. Our work covers London and the South East, and Bedfont is part of that. You can phone 0345 464 0079 or email us and tell us what needs doing.
Is parking a problem for a job in Bedfont?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
How do I get a quote for window mastic in Bedfont?
Size, access and the old material all affect the cost. Ask us for a quote.
Can you reach windows above the ground floor?
Yes, where they can be reached safely. Tell us about access when you get in touch so we can plan the job.
Should I try DIY first?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you.
Will new mastic stop draughts?
Often, yes. The gap between frame and wall is a common source of draughts, and resealing inside and out closes it.
How many windows can you do in a day?
A handful of frames is a short visit, while a whole house takes longer. You’ll get a timescale with the quote.
When something else is needed
In fairness, there are a few things sealant won’t fix:
- Broken hinges, locks or handles
- A failed sealed unit that has misted up
- A frame that has rotted at the joint
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly before booking.
What we seal
- Patio & French doors
- Timber windows & doors
- uPVC windows
- Composite doors
- Window sills
- Aluminium frames
What happens on the day
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the work takes a few hours for a handful of frames, longer for a whole house for a typical job. For a job in Bedfont, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
How to prepare
- Mention if the joints have been sealed before
- Tell us about any water getting in
- Keep pets and children clear of the area while we work
Getting a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Read more
Frames and glazing around Bedfont
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. With historic houses such as Strawberry Hill House (about 4.6 miles east) nearby, there’s older building stock in the area around Bedfont as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Bedfont is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. If you look after a building such as Fairholme Primary School, its window and door frames need their mastic kept sound, just like a home’s. In the older streets around Church of St Mary, the joint between an old wall and a newer frame is usually the first place rain gets in.
Bedfont is about 1 mile west of Feltham, in Greater London. Every kind of property in Bedfont is covered for window mastic, old or new, large or small. The work is guaranteed for a year. Our Greater London coverage runs to 764 places, Bedfont among them. For nearby work, see our London page, about 15 miles away.
Work in TW14, TW6 and TW13 is quoted and booked the same way as anywhere else. Local streets include Elm Road, New Road and East Road, and we cover them all. Other places close to Bedfont include West Bedfont (1 mile west), Feltham (1 mile east), Heathrow (1 mile north-west), Hatton (1 mile north-east) and Hounslow (1 mile south). Larger places within reach include London (15 miles east), City of Westminster (13 miles east), Marylebone (13 miles east), Kensington (11 miles east), St Pancras (15 miles east) and Hampstead (13 miles north-east).
Around Bedfont
Around Bedfont, our work takes us to homes and buildings near Space Studio West London and Spelthorne College and the streets around them. The nearest railway station is Heathrow Terminal 4 Rail station, roughly 0.7 miles north-west. Well-known places in the area include Kempton Steam Museum (2.3 miles south-east) and Treaty Centre (3.5 miles east). The countryside around Bedfont includes Staines Reservoirs and Crane Meadows.
How to look after the new joints
To keep the joints looking good and working properly:
- Walk round the house once a year and look at the joints
- Wash the frames with mild soapy water
- Make sure the drainage slots aren’t blocked
- Air rooms to keep condensation down around windows
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Catching it early keeps the fix to a reseal.