Greater London · England
Window & door mastic in Greenford, Greater London
Specialist window mastic for Greenford: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Cracked sealant at the sill ends
- Rain getting in at the frame or under the sill
- Gaps between the frame and the inside reveal
When something else is needed
It helps to know what we cannot do too:
- A frame that has rotted at the joint
- Condensation trapped between the panes
- Draughts through the window seals rather than the frame
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly before you book.
What we seal
- Window sills
- Aluminium frames
- uPVC windows
- Timber windows & doors
- Composite doors
- Patio & French doors
How we handle window mastic in Greenford
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. Our applicators cut it out and replace it with a flexible, weatherproof sealant. We work on timber windows & doors, window sills and composite doors, and the jobs we see most are mastic that has split away from the wall and cracked internal joints between frame and plaster.
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 Greenford.
Whatever the size of the job, you get the same 12-month guarantee.
- Place
- Greenford (UB6, UB5, UB1)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Do you need window mastic in Greenford?
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
People generally contact us when they notice something like this:
- Gaps between the frame and the inside reveal
- Mastic that has split away from the wall
- Rain getting in at the frame or under the sill
- Black, perished sealant on frames
As a London address, Greenford can be tricky for parking: let us know about parking bays, permits or a driveway.
Questions to ask before booking
- Whether the sealant suits the joint
- What the quote includes, VAT included or not
- How hidden problems are handled
- How the joint is cleaned and prepared
What window mastic looks like in Greenford
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book. Historic houses like Northolt Manor (about 1 mile north-west) are a reminder that the area around Greenford 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.
If you live in an older home near Parish Church of the Holy Cross (old Church), the joint between an old wall and a newer frame is generally the first place rain gets in. Schools such as Oldfield Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Greenford is about 3 miles north-west of Ealing, in Greater London. We provide window mastic to homes and businesses in Greenford and the surrounding area, as part of our work across Greater London. Our area takes in 764 places across Greater London. You can also see our page for London, roughly 11 miles from Greenford.
Postcode districts we cover here for window mastic: UB6, UB5 and UB1. Whether your property is on Courthope Road, Oldfield Farm Gardens and Greenford Road or anywhere close by, we can help. With the A4090 and A4127 close by, Greenford is simple for us to get to for window mastic. Other places close to Greenford include Northolt (1 mile north-west), Perivale (1 mile east), Sudbury (2 miles north-east), Sudbury Hill (2 miles north-east) and Dormers Wells (2 miles south-west). Further out, we also cover London (11 miles east), City of Westminster (9 miles east), Marylebone (9 miles east), Kensington (7 miles south-east), St Pancras (10 miles east) and Shoreditch (12 miles east).
Local landmarks in Greenford
In Greenford, that means homes and buildings near Ada Lovelace Church of England High School, The Railway pub and Northala Fields, among other places. There’s a railway station in Greenford itself: Greenford station. Nearby you’ll also find London Designer Outlet (3 miles north-east) and Clementine Churchill Hospital (2 miles north). For a walk, there’s Northala Fields and Litten Nature Reserve.
Landlord and commercial work in Greenford
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Greenford questions
Can you do window mastic in Greenford?
Yes, Greenford is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
Is parking a problem for a job in Greenford?
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 there any odour?
It depends on the product. Some products have a noticeable smell, others very little.
Can you do upstairs windows?
Yes, where it’s safe. For high or awkward windows, we will tell you what access is needed.
Do you do commercial work?
Yes. We can plan bigger jobs in stages to suit the site.
What does window mastic cost?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before we start.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Is the new sealant paintable?
Not if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
What affects the quote in Greenford
We do not publish a price list, because jobs vary so much. What we look at:
- The number and length of the joints
- Any working-time requirements on site
- How many rooms, windows or areas are involved
- Whether the work is at height
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
What to tell us for a quote
When you contact us, it’s useful to know:
- Roughly how big the job is
- Access, such as stairs, a lift or height
- The address or postcode of the job
- Photos by email, if that’s easy
Every job is quoted individually, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details, and pictures are welcome.
Nearby places to Greenford
More services for Greenford
What happens on the day
At the end, we look at the finished work together and explain the cure time. The visit itself normally takes anything from an hour or two to a full day, depending on how many frames there are, depending on the size of the job. For a job in Greenford, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Clear the area around the work
- Tell us about any previous sealing or DIY attempts
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
For window mastic in Greenford, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
Read more
Why deal with it now?
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. 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 Greenford.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
What you get with us
- We leave the area clean and tidy
- More than 20 years in sealant work
- Fully insured
- Homes, businesses and hotels
Read how sealant jobs are priced and customer reviews.
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. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.