Greater London · England
Window & door mastic in Eastfields, Greater London
We cover Eastfields for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- Sealant in the wrong colour for the frame
- Damp patches on the reveal after heavy rain
- Gaps where the sill meets the wall
What we can’t put right
Before booking, it’s worth knowing the limits too:
- Faulty window hardware
- A frame that has rotted at the joint
- Misting between the panes of a double-glazed unit (that needs a new unit)
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Patio & French doors
- Composite doors
- Timber windows & doors
- uPVC windows
- Window sills
- Aluminium frames
Window mastic in Eastfields, done properly
Whether it’s one leaking patio door or every frame on the house, you’ll get a clear quote before we start. Just call 0345 464 0079 or send us an email and tell us how many frames there are and how they’re reached for window mastic in Eastfields. We work on timber windows & doors, patio & French doors and aluminium frames, and people most often call us about untidy mastic left by window fitters and old mastic that has gone black or come away.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or drop us an email.
- Place
- Eastfields (CR4, SW16, SW17)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Eastfields: your questions answered
Is parking a problem for a job in Eastfields?
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.
Can you do window mastic in Eastfields?
Yes. Our work covers London and the South East, and Eastfields is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
What does window mastic cost?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or send us an email and let us know what needs doing and where.
Can I do it myself?
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.
How long before the joint can be used?
It depends on the product and the temperature. We tell you how long to leave it before we go.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Will new mastic stop draughts?
In many cases. Air often gets in between the frame and the wall, and resealing inside and out closes it.
Do you work for landlords and businesses?
Yes. We work in homes, commercial premises and hotels, and we’re fully insured.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Quotes for window mastic in Eastfields
You will get a clear quote before work begins. It’s based on:
- Working hours on commercial sites
- Access and height
- How many areas need sealing
- Whether old sealant or filler has to be cut out
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
Helping us quote
What to tell us when you ask for a quote:
- Where the property is
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
- Pictures of the joints, sent by email
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details, and photos are welcome.
Windows and doors in Eastfields
With historic houses such as Southside House (about 3.4 miles west) nearby, there’s older building stock in the area around Eastfields as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
For landlords with property near Mitcham Eastfields station, renewing tired window mastic between tenants heads off draught and damp complaints. Homes close to St. Mark's Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Eastfields is about 3 miles south-east of Wimbledon, in Greater London. Wherever you are in the CR4 postcode area, we can carry out window mastic at your property. Our area takes in 764 places across Greater London, from the larger towns to small villages. Our London page covers work nearby (7 miles or so).
All of CR4, SW16 and SW17 is within our area for window mastic, from the main roads to the quietest streets. Whether your property is on Bond Road, Hill Road and York Lane or anywhere close by, our applicators can take on the job. Other places close to Eastfields include Mitcham (1 mile south), Hackbridge (1 mile south), Colliers Wood (1 mile north-west), Furzedown (1 mile north) and Merton Abbey (1 mile west). Within a short drive, we also cover London (7 miles north), City of Westminster (7 miles north), Marylebone (8 miles north), Kensington (7 miles north), St Pancras (8 miles north) and Shoreditch (9 miles north).
Local landmarks in Eastfields
Typical jobs here are in homes near The White Lion of Mortimer pub, Figge's Marsh and Furzedown Secondary School and the streets around them. Eastfields has its own railway station: Mitcham Eastfields station. Nearby you’ll also find Centrale Croydon (3.1 miles south-east) and Wandle Industrial Museum (0.7 miles south-west). For a walk, there’s Henman Hill and Oakleigh Way.
Different surfaces, different methods
Patio & French doors
Not every patio door leak is a mastic problem: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We check before we reseal.
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. We will point out any rot we find, as that is a job for a joiner.
What we are called out for in Eastfields
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, leaving a hairline gap down one side.
Keep an eye out for these signs:
- Rushed sealant from a window installation
- Cold air getting in at the frame edge
- Draughty joints inside around the window
- Mastic that’s falling out in pieces
Eastfields is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Comparing quotes
- Who turns up on the day
- Whether VAT is included
- The length of the guarantee
- How the joint is cleaned and prepared
Also near Eastfields
Also in Eastfields
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. Our tips:
- Check the mastic once a year
- Keep paint off silicone joints
- Clear any debris from frame drain holes
- Keep solvents and bleach off the sealant
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
The process
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a few frames, or a day or more for a whole house. In Eastfields, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Clear the area around the work
- Let us know about stairs, lifts or work at height
- On commercial sites, let us know about site rules
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.