Greater London · England
Window Mastic in Hanwell
Window mastic for Hanwell and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Black, perished sealant on frames
- Rain getting in at the frame or under the sill
- Leaking joints at the ends of sills
About our window mastic in Hanwell
Around Hanwell we seal all kinds of frames: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. If you have mastic that’s falling out in pieces and gaps between the frame and the inside reveal, we can put it right.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
Our work is backed for twelve months, in Hanwell and everywhere else we cover.
- Location
- Hanwell (W7, W13, UB2)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
Every visit runs the same way: we check the joints, protect the area around them, carry out the job and clear up. It usually takes a few hours for a handful of frames, longer for a whole house. In Hanwell, 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.
- 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.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
Get a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll talk you through the work.
Advice
Why it’s worth doing now in Hanwell
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. 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. Putting it right early is much less trouble for homes in Hanwell.
The cost depends on how much there is to do, how hard the old material is to remove and access to the work. We give a clear quote before work begins, so you know where you stand.
Why us?
- An ARBOMaster approved applicator
- Tidy, careful work
- Experience in homes, commercial sites and hotels
- Every job guaranteed for a year
Read what affects the cost and our reviews.
Hanwell: your questions answered
I let a flat near Hanwell station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Can you do window mastic in Hanwell?
Yes. Our work covers London and the South East, and Hanwell is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we will give you a clear price.
Is the new sealant paintable?
Not normally, if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
Do you remove the old sealant?
Yes, every time. New sealant won’t bond properly to old, so the joint is cleaned back first.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used before we leave.
Do you work for hotels and businesses?
Yes, regularly. We can plan bigger jobs in stages.
Can you do the inside joint as well?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We can do either or both.
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.
Also near Hanwell
What else we do in Hanwell
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
How the job changes by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so they get particular care.
Timber windows & doors
Timber moves with moisture as well as heat, so a flexible sealant is essential. We seal onto sound, dry paintwork or timber.
What sealant work can’t fix
We’d rather tell you now than do work that will not last, so these are the limits:
- A door that needs adjusting, rehanging or new seals
- Soft or decayed wood in 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’ll say what we think before booking.
Surfaces we seal
- Timber windows & doors
- Composite doors
- Window sills
- Aluminium frames
- Patio & French doors
- uPVC windows
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Air rooms to keep condensation down around windows
- Keep drainage slots and sill grooves clear
- Look round the frames every year or so
- Clean frames with a soft cloth and soapy water
Check the drainage slots in the frames aren’t blocked, so rain drains out rather than building up at the sealant.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
Landlord and commercial work in Hanwell
We also work for property managers and facilities teams. We can quote a run of properties together.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Frames and glazing around Hanwell
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Pitzhanger Manor (about 1.3 miles east) are a reminder that the area around Hanwell 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 look after a building such as St Joseph's Catholic Primary School, its window and door frames need their mastic kept sound, just like a home’s. If you let a flat or house near Hanwell station, renewing tired window mastic between tenants heads off draught and damp complaints. As a London address, Hanwell can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Hanwell is about 1 mile west of Ealing, in Greater London. If you need window mastic in Hanwell, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover Greater London from our Crawley base, Hanwell included. Hanwell is one of 764 places in Greater London we cover. You can also see our page for London, about 10 miles away.
Here we cover the W7, W13 and UB2 postcode area for window mastic. Whether your property is on Park Road, Green Lane and Felix Road or a nearby road, our applicators can take on the job. Hanwell is on the A4001, which makes it straightforward to reach. If you are just outside Hanwell, we cover West Ealing (1 mile west), Ealing (1 mile east), Dormers Wells (1 mile north-west), South Ealing (1 mile south-east) and Pitshanger (2 miles north-east). Larger places within reach include London (10 miles east), City of Westminster (8 miles east), Marylebone (8 miles east), Kensington (6 miles east), St Pancras (10 miles east) and Shoreditch (11 miles east).
Around Hanwell
Around Hanwell, our work takes us to homes and buildings near Drayton Manor High School, Cuckoo Schools and Drayton Green, among other places. Hanwell has its own railway station: Hanwell station. Other landmarks nearby include Ealing Hospital (less than half a mile west) and Gunnersbury Park House - Large Mansion (2.3 miles east). Not far away are Middle Lake and Castlebar Hill.