Greater London · England
Window Mastic in South Wimbledon
Specialist window mastic for South Wimbledon: careful preparation, the right product and tidy work. Call for a quick quote.
- Damp patches on the reveal after heavy rain
- Old mastic that has gone black or come away
- Untidy mastic left by window fitters
Window mastic in South Wimbledon
A cold draught around a closed window often comes from the frame edge. 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 timber windows & doors, uPVC windows and aluminium frames, and people most often call us about whistling draughts around closed windows and rushed sealant from a window installation.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Location
- South Wimbledon (SW19, SW20, SW17)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the quote in South Wimbledon
We quote each job individually. This is what makes a difference:
- The old material and how stubborn it is
- Mould in or behind the old joints
- The number of rooms or windows
- The product the joint needs
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- The problem you’ve noticed
- Where the job is, and your postcode
- Pictures of the joints, sent by email
- How we’d reach the joints
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Questions from South Wimbledon
Can you help a landlord with a rental near Wimbledon station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
Do you cover South Wimbledon for window mastic?
Yes. We work across London and the South East, and South Wimbledon 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 should I tell you?
Just the basics: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or send us an email.
Where is Mr Mastic based?
We work from Crawley. We cover South Wimbledon and the rest of Greater London.
Can resealing stop a draught around my window?
Yes, where the draught is at the frame edge. We check where the draught is before work begins.
Can you reach windows above the ground floor?
Usually, yes. Access is planned before work begins, so mention the height and anything in the way.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures.
How the job changes by surface
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the sealant goes in between frame and wall and tooled smooth.
Composite doors
A composite door usually sits in a plastic outer frame, and the joint around it is sealed like a window. We match the colour to the frame.
How it works
We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours for a handful of frames, longer for a whole house. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in South Wimbledon. A visitor permit or a nearby bay makes the visit run more smoothly.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Mention any tricky access
- Mention any leaks or damp you’ve noticed
- Mention any parking rules near the property
How to get a quote
Want a quote for window mastic? Please phone 0345 464 0079 or email us and tell us about the job. We’ll explain what we’d do and give you a clear quote before work begins.
Read more
South Wimbledon homes and the weather
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. Historic houses like Southside House (about 1.6 miles west) are a reminder that the area around South Wimbledon has older buildings as well as new. 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.
For landlords with property near Wimbledon station, renewing tired window mastic between tenants heads off draught and damp complaints. South Wimbledon is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. If you live in an older home near Holy Trinity, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
South Wimbledon is about 1 mile south-east of Wimbledon, in Greater London. Wherever you are in the SW19 postcode area, our applicators can take on window mastic. South Wimbledon is one of 764 places in Greater London where we work for window mastic. For nearby work, see our London page.
Jobs for window mastic in SW19, SW20 and SW17 is quoted and booked the same way as anywhere else. If you need window mastic at a property on Gap Road, Mina Road and York Road or a nearby road, we can help. Other places close to South Wimbledon include Merton (1 mile south-east), Merton Abbey (1 mile south-east), Summerstown (1 mile north-east), Colliers Wood (1 mile east) and Tooting Bec (1 mile north-east). We also work in nearby towns such as London (7 miles north-east), City of Westminster (7 miles north), Marylebone (7 miles north), Kensington (6 miles north), St Pancras (8 miles north-east) and Shoreditch (9 miles north-east).
Landmarks near South Wimbledon
Typical jobs here are in homes near Wimbledon High School, Wibbas Down Inn and Willington School, among other places. There’s a railway station in South Wimbledon itself: Wimbledon station. Well-known places in the area include Southside Wandsworth (2.4 miles north) and Wimbledon Museum (0.9 miles west). Green spaces nearby include Battersea Park Lake and Merton Park Green Walks.
Landlords, agents and businesses in South Wimbledon
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
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, then guaranteed for a year.
Honest limits
Before booking, it’s worth knowing the limits:
- Broken hinges, locks or handles
- Draughts through the window seals rather than the frame
- Misting between the panes of a double-glazed unit (that needs a new unit)
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think before booking.
What we seal
- Patio & French doors
- Composite doors
- Timber windows & doors
- Aluminium frames
- Window sills
- uPVC windows
Towns and villages near South Wimbledon
What else we do in South Wimbledon
Leave it or put it right?
Working on frames from a ladder with a sealant gun isn’t easy, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler for homes in South Wimbledon.
The cost reflects the work involved, not a rough estimate. That’s why we ask a few questions first and agree the price before starting.
Why us?
- White, clear, grey or another colour, product permitting
- Rated 4.9 stars on Google
- Quality sealants from Arbo and Everbuild
- We agree the colour with you first
See our cost guide and customer reviews.