Greater London · England
Brook Green Window Mastic
Specialist window mastic for Brook Green: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Rain getting in at the frame or under the sill
- Black, perished sealant on frames
- White mastic on grey or black frames
Window mastic in Brook Green
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through. Where the air is getting in through the window itself, we’ll say so. We work on composite doors, aluminium frames and timber windows & doors, and people most often call us about draughty joints inside around the window and damp patches on the reveal after heavy rain.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, letting in draughts and water.
Every job is covered by our 12-month guarantee, wherever you are in Greater London.
- Location
- Brook Green (W6, W14, W12)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for window mastic
Every job gets its own quote. This is what makes a difference:
- Any mould that needs treating
- How many rooms, windows or areas are involved
- The size of the job
- When we can work, for business premises
Doing several joints on one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
What to tell us for a quote
You don’t need to know the technical terms. It helps if you can tell us:
- Pictures of the joints, sent by email
- Whether it has been sealed before
- How many joints, rooms or windows are involved
- Where the property is
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work.
How the job changes by surface
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the threshold joint takes a lot of water. Each is cleaned, backed where deep and resealed.
Window sills
Where a sill meets brick or render, the ends often crack first. We reseal them so rain can’t run into the wall.
Also near Brook Green
Also in Brook Green
For landlords and businesses
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Keeping the joints in good condition
Looking after new joints is easy:
- Walk round the house once a year and look at the joints
- Avoid blasting the frames with a pressure washer
- Repaint timber before it’s bare
- Ventilate rooms so frames don’t stay wet inside
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
Wet, windy weather is when failed mastic shows itself, 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.
Why act early in Brook Green
Redecorating is a good moment to renew the mastic. Fresh joints finish the job neatly, and it’s easier while the walls are being worked on anyway. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in Brook Green.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why Brook Green customers choose us
- A 12-month guarantee on all work
- Any old sealant cut out fully, not covered over
- A choice of colours where the product allows
- ARBOMaster approved applicator
Read our cost guide or our reviews.
Brook Green homes and the weather
With historic houses such as Kelmscott House (about 0.8 miles south-west) nearby, there’s older building stock in the area around Brook Green 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. 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.
For an older house near a landmark such as The Parish Church of Saint Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Rented homes near Kensington Olympia station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. As a London address, Brook Green can be tricky for parking: let us know about parking bays, permits or a driveway.
Brook Green is about 1 mile west of Kensington, in Greater London. For window mastic in and around Brook Green, please phone 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Greater London, Brook Green included. Our Greater London coverage runs to 764 places, and Brook Green is one of them.
Postcode districts we cover here for window mastic: W6, W14 and W12. We cover properties on Adie Road, Rowan Road and Anley Road and the roads around them. We also cover Hammersmith (1 mile west), Brackenbury Village (1 mile west), North End (1 mile south-east), West Kensington (1 mile south-east) and Fulham (1 mile south-east). We also work in nearby towns such as London (5 miles east), City of Westminster (3 miles north-east), Marylebone (3 miles north-east), St Pancras (5 miles north-east), Shoreditch (6 miles east) and Walthamstow (11 miles north-east).
Near you in Brook Green
Typical jobs here are in homes near Queen's Head pub, Sacred Heart High School and Polish Library POSK in London and the streets around them. Other local landmarks include Corona Theatre School (0.6 miles west) and St Paul's Gardens (less than half a mile south-east). Brook Green’s nearest station is Kensington Olympia station, about 0.5 miles east. Other landmarks nearby include Culture House (0.6 miles north) and Hammersmith Broadway (less than half a mile south-west). Open spaces near Brook Green include WWT London Wetland Centre and Campden Hill.
Brook Green questions
Is parking a problem for a job in Brook Green?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Is Brook Green in your area for window mastic?
Yes, Brook Green is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing.
Do you seal inside as well as outside?
Yes, we do both. Indoors, we seal between the frame and the plaster or reveal.
How many windows can you do in a day?
The work takes a few hours for a handful of frames, longer for a whole house. Access and the amount of old mastic make the biggest difference.
Can you seal over the old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
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.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
The process
We keep the work tidy and contained to the area we’re working on. The job generally takes a few hours for a few frames, or a day or more for a whole house, and we explain the cure time before we leave. For a job in Brook Green, 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.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Try not to wet indoor joints just before the visit
- Mention any parking rules near the property
Get a quote
For a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.