Greater London · England
Window & door mastic in Bromley, Greater London
Mastic around window and door frames, sills and patio doors in Bromley, with a one-year guarantee on every job. Call for a quick quote.
- A bead that doesn’t match the frame
- Mastic that is falling out in pieces
- Gaps where the sill meets the wall
About our window mastic in Bromley
Homes in Bromley have every kind of window: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. Typical jobs include gaps between the frame and the inside reveal and black, perished sealant on frames, across window sills, uPVC windows and composite doors.
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 Bromley as anywhere.
A 12-month guarantee comes as standard, so you’re covered after we’ve gone.
- Place
- Bromley (E3, E14, E15)
- Wider area
- Greater London
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why deal with it now?
Resealing frames is a short job: the visit takes a few hours for a handful of frames, longer for a whole house. 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 Bromley, the repair is bigger than the sealant job would have been.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What you get with us
- An ARBOMaster approved applicator
- Quality sealants from Arbo and Everbuild
- Colour agreed with you before we start
- White, clear, grey or coloured to suit, where the product allows
Read our cost guide and our reviews.
When to call us in Bromley
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
Most people get in touch after spotting one of these:
- Cold air getting in at the frame edge
- Hard, cracked sealant around windows
- Gaps where the sill meets the wall
- Draughty joints inside around the window
Rented homes near West Ham station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
What to look for in a quote
- Who turns up on the day
- Are they insured?
- Whether all the old sealant comes out first
- The length of the guarantee
Questions from Bromley
Is parking an issue for window mastic in Bromley?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Can you do window mastic in Bromley?
Yes, Bromley is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing.
Will there be a smell?
Some sealants have a smell while they cure. Opening a window helps.
Is it OK to seal over old sealant?
No. The old sealant always comes out first.
How do I get a quote for window mastic in Bromley?
It depends on the job, so we quote each one individually. To get one, ring 0345 464 0079 or send us an email with a short description of the job.
Do you hold any approvals?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Is the new sealant paintable?
Not normally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access.
The process
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a few frames, or a day or more for a whole house. For a job in Bromley, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry.
- 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
- Keep children and pets away from the work area
- Let us know about stairs, lifts or work at height
- Clear items away from the joints we’re working on
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Read more
Places near Bromley
More services for Bromley
How the job changes by surface
Composite doors
Draughts round the door leaf usually come from worn seals or adjustment, not the mastic. We seal the frame and let you know about anything else.
Window sills
Every drop off the glass ends up on the sill, so the joints at each end and underneath matter. Each is cleaned out and resealed.
Frames and glazing around Bromley
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Sutton House (about 2.2 miles north-west) nearby, there’s older building stock in the area around Bromley 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.
As a London address, Bromley can be tricky for parking: let us know about parking bays, permits or a driveway. Managing a site like St Agnes RC Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Bromley is about 2 miles east of Whitechapel, in Greater London. We carry out window mastic for homes and businesses in Bromley and nearby, as part of our work across Greater London. Across Greater London, we cover 764 places, and Bromley is one of them.
All of E3, E14 and E15 is covered for window mastic, from the main roads to the quietest streets. Streets in the area include Bow Road, Bruce Road and Edgar Road, and we cover them all. We also cover the places around Bromley: Three Mills (1 mile north-east), Mill Meads (1 mile north-east), Bow Common (1 mile south-west), Mile End (1 mile west) and Bow (1 mile north-west). Larger places within reach include London (4 miles south-west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (4 miles west) and Shoreditch (3 miles west).
Around Bromley
Around Bromley, our work takes us to homes and buildings near Bob's Park, East London Arts & Music and Bow School and the streets around them. The closest station to Bromley is West Ham station, roughly 1 mile east. A little further out are Tower of London (2.8 miles south-west) and Stratford Centre (1.4 miles north-east). Green spaces nearby include Old Ford Island and Tower Hill.
Landlords, agents and businesses in Bromley
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Landlords and letting agents in Bromley can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
What we can’t put right
To be straight with you, there are a few things sealant will not fix:
- A frame that has rotted at the joint
- Damp problems in the wall away from the window
- A door that needs adjusting, rehanging or new seals
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer before you book.
What we seal
- uPVC windows
- Patio & French doors
- Timber windows & doors
- Aluminium frames
- Window sills
- Composite doors
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Air rooms to keep condensation down around windows
- Keep paint off silicone joints
- Keep timber frames painted
- Clear any debris from frame drain holes
Silicone cannot generally be painted, so if you’re planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Leaks normally show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.