Greater London · England
Perivale Window Mastic
Mastic around window and door frames, sills and patio doors for homes and businesses in Perivale and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- A bead that doesn’t match the frame
- Damp patches on the reveal after heavy rain
- Gaps left after new windows were fitted
Window mastic for homes and businesses in Perivale
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that can’t move properly, so deep gaps get backing rod first. The sealant then grips the two sides it should. If you have black, perished sealant on frames and rushed sealant from a window installation, we can put it right, on timber windows & doors, patio & French doors and uPVC windows alike.
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, which is when draughts and damp patches appear in homes in Perivale.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Where
- Perivale (UB6, HA0, W5)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we cannot put right
In fairness, some problems need a different trade:
- Draughts through the window seals rather than the frame
- Soft or decayed wood in the frame
- Damp coming through the wall itself rather than the frame joint
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before you book.
What we seal
- Timber windows & doors
- Patio & French doors
- Window sills
- uPVC windows
- Composite doors
- Aluminium frames
What the job involves on each surface
Composite doors
A composite door usually sits in a plastic outer frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
uPVC windows
We clean the frame edge carefully so the plastic isn’t marked, then the sealant goes in between frame and wall and tooled smooth.
Landlords, agents and businesses in Perivale
We also work for property managers and facilities teams in Perivale and across Greater London. We can quote a run of properties together.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Perivale homes and the weather
In a converted house or block, who looks after the windows depends on the lease, so check that before booking. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
As a London address, Perivale can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Rented homes near South Greenford station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Perivale is about 1 mile east of Greenford, in Greater London. Perivale gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Our Greater London coverage runs to 764 places, and Perivale is one of them. There’s also a page for London, about 10 miles away.
We cover every part of UB6, HA0 and W5 for window mastic. Whether your property is on Lee Road, Wicket Road and Bilton Road or a nearby road, we can help. We also cover the places around Perivale: Pitshanger (1 mile south), Brentham Garden Suburb (1 mile south-east), Sudbury Hill (1 mile north), Sudbury (1 mile north) and Greenford (1 mile west). We also work in nearby towns such as London (10 miles east), City of Westminster (7 miles east), Marylebone (8 miles east), Kensington (6 miles south-east), St Pancras (9 miles east) and Shoreditch (10 miles east).
Around Perivale
Around Perivale, our work takes us to homes and buildings near Alperton Community School, Castle Bar Park and Brentham Clubhouse pub and the streets around them. The nearest railway station is South Greenford station, roughly 0.8 miles south-west of the centre. Nearby you will also find London Transport Museum Depot (2.8 miles south-east) and London Designer Outlet (1.9 miles north-east). Green spaces nearby include Middle Lake and Castlebar Hill.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
When to call us in Perivale
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
Common reasons people contact us include:
- Untidy mastic left by window fitters
- Cracked internal joints between frame and plaster
- Mastic that’s falling out in pieces
- Cold air getting in at the frame edge
Schools such as St John Fisher Catholic Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before booking
- What the cure time is
- What insurance they hold
- How the colour is chosen
- What the quote includes, VAT included or not
Perivale: your questions answered
I let a flat near South Greenford station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can go on one quote. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Can you do window mastic in Perivale?
Yes, Perivale is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job.
Are you fully insured?
Yes. Full insurance covers our work.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses and we’re fully insured.
Can resealing stop a draught around my window?
Yes, if the air is getting in around the frame. If it’s coming through the window seals, we will tell you.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
How many windows can you do in a day?
A handful of frames is a short visit, while a whole house takes longer. We confirm the timing with your quote.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. Indoors, that generally means someone at home.
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we will take it from there. The work itself takes a morning for a couple of windows and a door, including the tidy-up. In Perivale, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- 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.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Tell us about any previous sealing or DIY attempts
- Let us know if you’ve seen damp or leaks
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will explain what’s involved.
Read more
More services for Perivale
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Clear any debris from frame drain holes
- Use gentle cleaners on frames and sealant
- Don’t paint over the silicone
- Do not use solvent cleaners on the joint
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.