Greater London · England
Window & door mastic in South Ruislip, Greater London
Problem with your window and door frames in South Ruislip? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Gaps where the sill meets the wall
- Rain getting in at the frame or under the sill
- Old mastic that has gone black or come away
What affects the cost of window mastic
We do not publish a price list, because no two jobs are the same. What we look at:
- Which sealant suits the joint
- Working hours on commercial sites
- The old material and how stubborn it is
- Any mould that needs treating
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Access, such as stairs, a lift or height
- How many joints, rooms or windows are involved
- If it’s domestic, commercial or a hotel
- If someone has resealed it before
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
Window mastic in South Ruislip, done properly
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re ARBOMaster approved and fully insured, and every job is covered by a 12-month guarantee. If you have rushed sealant from a window installation and old mastic that has gone black or come away, we can put it right, on timber windows & doors, uPVC windows and composite doors alike.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, which is when draughts and damp patches appear in homes in South Ruislip.
All our work is covered by a one-year guarantee, wherever you are in Greater London.
- Place
- South Ruislip (HA4, UB5, HA2)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Window mastic in South Ruislip: local notes
Historic houses like Northolt Manor (about 1.4 miles south-east) are a reminder that the area around South Ruislip has older buildings as well as new. Where a home is older, 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.
Rented homes near South Ruislip station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. As a London address, South Ruislip can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
South Ruislip is about 1 mile south-east of Ruislip, in Greater London. We provide window mastic to householders, landlords and businesses in South Ruislip, as part of our work across Greater London. We cover 764 towns and villages across Greater London. Our London page covers work nearby, about 13 miles away.
We work across the HA4, UB5 and HA2 postcode area for window mastic and the streets around it. If you need window mastic at a property on Crown Road, Nairn Road and Palace Road or a nearby road, our applicators can take on the job. Other places close to South Ruislip include Northolt (1 mile south-east), Roxbourne (1 mile north), Rayners Lane (1 mile north-east), South Harrow (2 miles east) and Eastcote (2 miles north). Larger places within reach include London (13 miles east), City of Westminster (11 miles east), Marylebone (11 miles east), Kensington (9 miles south-east), St Pancras (12 miles east) and Shoreditch (14 miles east).
Local landmarks in South Ruislip
We work in homes and buildings around Northala Fields, The Black Bull pub and Queensmead School, among other places. South Ruislip has its own railway station: South Ruislip station. Nearby you’ll also find Clementine Churchill Hospital (2.7 miles east) and Heath Robinson Museum (2.4 miles north). Not far away are Middle Lake and Islip Manor Meadows.
Common questions in South Ruislip
Can you help a landlord with a rental near South Ruislip station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Can you do window mastic in South Ruislip?
Yes. We work across London and the South East, and South Ruislip is part of that. Just call 0345 464 0079 or email us with a few details of the job.
How long will my window job take?
That depends on the number of frames, how they’re reached and the state of the old mastic. You will know the timing when we quote.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Do you take out the old sealant first?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
When to call us in South Ruislip
Joint shape matters as much as the product. A skim of sealant over a wide gap soon tears, and a gap filled solid cannot flex. That’s what backing rod is for.
The most common problems we see are:
- Water coming in at the bottom corners of a door
- Whistling draughts around closed windows
- Old mastic that has gone black or come away
- A bead that doesn’t match the frame
Managing a site like Deanesfield Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- How much experience the applicator has
- When the joint can take water or movement
- What guarantee comes with the work
- What preparation is included
Surface by surface
Composite doors
Front doors take the weather head on, and the top and bottom corners tend to fail first. Those corners get the most care.
uPVC windows
uPVC expands and contracts noticeably with temperature, so the joint needs a low-modulus sealant that stays flexible. We match white, brown, anthracite grey and black frames.
Places near South Ruislip
What else we do in South Ruislip
How it works
Most of a good job is in the preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a morning for a couple of windows and a door. In South Ruislip, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
- Mention any sign-in or site rules at work premises
Getting a quote
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before work begins.
Read more
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Faulty window hardware
- Damp coming through the wall itself rather than the frame joint
- A frame that has rotted at the joint
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
Surfaces we seal
- Composite doors
- Window sills
- Timber windows & doors
- Patio & French doors
- uPVC windows
- Aluminium frames
Why it’s worth doing now in South Ruislip
If you are painting or rendering, reseal at the same time. Fresh joints finish the job neatly. 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. Putting it right early is much less trouble for homes in South Ruislip.
What you pay reflects the work, not guesswork. That is why we ask about the job first and give you a clear price before any work starts.
Why book with us
- Over 20 years’ experience
- Old sealant always removed completely
- Domestic, commercial and hotel work
- Colour picked to suit the job
See our cost guide or customer reviews.
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Landlords and letting agents in South Ruislip can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.