Greater London · England
Window & door mastic in West Barnes, Greater London
Mastic around window and door frames, sills and patio doors for homes and businesses in West Barnes and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cracked or shrunken mastic around the frame
- Rain getting in at the frame or under the sill
- Sealant in the wrong colour for the frame
For landlords and businesses
If you manage several properties in or around West Barnes, several properties can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
How we handle window mastic in West Barnes
Homes in West Barnes have every kind of window: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. We work on composite doors, timber windows & doors and patio & French doors, and people most often call us about sealant in the wrong colour for the frame and old mastic that has gone black or come away.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first.
Big or small, you get the same 12-month guarantee.
- Location
- West Barnes (KT3, SW20)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in West Barnes
Resealing frames is a short job: the visit takes anything from an hour or two to a full day, depending on how many frames there are. Leave it until water is coming in and you may need plastering and decorating as well. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in West Barnes.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why us?
- Sealant colour chosen to suit
- 20+ years of sealant experience
- Neat joints and a tidy finish
- You choose the colour before work begins
See what affects the cost and what customers say.
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Windows and doors in West Barnes
With historic houses such as Southside House (about 1.1 miles north) nearby, there’s older building stock in the area around West Barnes 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’s traditional sand mastic. In a converted house or block, who looks after the windows depends on the lease, so check that before booking.
As a London address, West Barnes can be tricky for parking: let us know about parking bays, permits or a driveway. Rented homes near Motspur Park station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Managing a site like Sacred Heart Catholic Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
West Barnes is about 2 miles south-west of Wimbledon, in Greater London. From the centre of West Barnes to the outskirts, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Across Greater London, we cover 764 places, West Barnes among them. There’s also a page for London, roughly 9 miles from West Barnes.
Our applicators cover all of the KT3 and SW20 postcode area for window mastic. Streets in the area include Queens Road, Blakes Lane and Egmont Road, and we cover them all. We also cover Raynes Park (1 mile north-east), Motspur Park (1 mile north-west), Bushey Mead (1 mile north-east), Cannon Hill (1 mile east) and New Malden (1 mile west). Further out, we also cover London (9 miles north-east), City of Westminster (9 miles north-east), Marylebone (9 miles north-east), Kensington (7 miles north), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
What’s near West Barnes
We work in homes and buildings around Beverley Park, The Fountain pub and Ursuline Preparatory School. There’s a railway station in West Barnes itself: Motspur Park station. Well-known places in the area include Bentall Centre (2.9 miles west) and Chessington Castle Hill (3.7 miles south-west). Green spaces nearby include Kingston Hill Road area and Derwent Floodwash.
How the visit works
The work is kept neat and contained to the joints we are treating, so you can get on with your day. The job generally takes a morning for a couple of windows and a door, and we tell you how long to leave it before we go. For a job in West Barnes, 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.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
Before we arrive
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
- Let us know about stairs, lifts or work at height
How to get a quote
If you are in West Barnes and need window mastic, phone 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Advice
How to look after the new joints
Good habits help new joints last longer. A few tips:
- Keep solvents and bleach off the sealant
- Keep timber frames painted
- Clean frames with a soft cloth and soapy water
- Air rooms to keep condensation down around windows
Try not to touch the new joint while it cures, following the cure time we give you. Don’t point a pressure washer at the joints.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
West Barnes questions
Can you help a landlord with a rental near Motspur Park station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover West Barnes for window mastic?
Yes. We work across London and the South East, and West Barnes is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
Will new mastic stop draughts?
Often, yes. Air often gets in between the frame and the wall, and sealing the inside and outside joints closes that path.
How long will my window job take?
The work takes anything from an hour or two to a full day, depending on how many frames there are. Access and the amount of old mastic make the biggest difference.
Do I have to be there?
That depends on where the joints are. Inside work needs someone to give us access.
When is the sealant fully cured?
Cure times vary by product. Before we leave, we’ll tell you the cure time.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
Can new window sealant be painted?
It depends on the sealant. Some hybrid sealants can be painted; silicone cannot. Tell us if you are decorating and we’ll choose accordingly.
Nearby places to West Barnes
What else we do in West Barnes
What affects the cost of window mastic
Your quote is based on your job. We take into account:
- How easy the joints are to reach
- Working hours on commercial sites
- The product the joint needs
- Mould in or behind the old joints
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll go through it with you.
Helping us quote
To help us quote quickly, please include:
- What the problem is, such as mould, gaps, leaks or cracking
- Photos by email, if that is easy
- Where the property is
- The rough size of the job
Want a quote for window mastic? Please call 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and give you a clear price before any work starts.
When it isn’t the sealant
Before you book, it’s worth knowing the limits too:
- Condensation trapped between the panes
- Soft or decayed wood in the frame
- Faulty window hardware
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before you book.
What we seal
- uPVC windows
- Patio & French doors
- Aluminium frames
- Composite doors
- Timber windows & doors
- Window sills