Greater London · England
Window & door mastic in Acton Green, Greater London
We cover Acton Green for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- Gaps between the frame and the inside reveal
- Untidy mastic left by window fitters
- Old mastic that has gone black or come away
DIY versus a professional finish
The difference is mostly in the preparation and the 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.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
About our window mastic in Acton Green
A window frame and the wall around it expand and shrink at different rates. Heat and cold make frames grow and shrink against brick or render that hardly moves. So the sealant has to stretch and recover, which is why we use a low-modulus product. If you are dealing with gaps left after new windows were fitted and draughty joints inside around the window, we can put it right, on window sills, uPVC windows and patio & French doors alike.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
A 12-month guarantee comes as standard, so you are covered after we’ve gone.
- Place
- Acton Green (W4, W3, W2)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of window mastic
The price is agreed before any work begins. It’s based on:
- How easy the joints are to reach
- The type of sealant required
- How much there is to do
- Working hours on commercial sites
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Asking for a quote
To help us quote quickly, let us know:
- A few photos by email, if you can
- The address or postcode of the job
- The rough size of the job
- If someone has resealed it before
For a quote, phone 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll send you a clear quote before any work starts.
Common problems we fix in Acton Green
Frames are never completely still. Sun on a frame makes it expand, and it contracts again overnight, while the masonry beside it stays put. If the sealant can’t stretch, it splits.
If you can see any of these, it’s time to have the joints looked at:
- Gaps left after new windows were fitted
- Leaking joints at the ends of sills
- Black, perished sealant on frames
- Cracked internal joints between frame and plaster
As a London address, Acton Green can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
What your quote should include
- What insurance they hold
- Which colour the sealant will be
- What the quote includes, VAT included or not
- What guarantee comes with the work
Why act early in Acton Green
Not every sealant suits a window. Decorators’ caulk and bathroom silicone are not designed for outside joints that move. A low-modulus exterior sealant keeps its stretch through hot and cold weather. 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.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- Old sealant always removed completely
- 12-month guarantee on every job
- ARBOMaster approved applicator
- Quality sealants from Arbo and Everbuild
Take a look at what affects the cost and our reviews.
Towns and villages near Acton Green
What else we do in Acton Green
The process
Every visit runs the same way: we check the joints, protect the area around them, do the work and clear up. It generally takes a few hours for a handful of frames, longer for a whole house. In Acton Green, 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.
- We remove the old mastic and clean the frame edge and wall.
- 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.
Getting ready for the visit
- Mention any parking rules near the property
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any water getting in
Ask for a quote
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand.
Advice
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Don’t use solvent cleaners on the joint
- Check the mastic once a year
- Wash the frames with mild soapy water
- Don’t aim a pressure washer at the joints
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Acton Green questions
I let a flat near South Acton station. Can you help?
Yes, we work for landlords and agents. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Can parking be tricky for a visit in Acton Green?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Do you cover Acton Green?
Yes. We’re based in Crawley and work across South East England, London and Scotland, and that includes Acton Green.
Will you leave a mess?
Tidy work is part of the job. Nearby surfaces are protected.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
How long does it take to reseal the windows on a house?
Allow anything from an hour or two to a full day, depending on how many frames there are. Access and how stubborn the old mastic is affect the time most.
Do you work on first-floor windows?
Usually, yes. We plan safe access before the job.
How do I get a quote for window mastic in Acton Green?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before work begins.
Acton Green homes and the weather
Historic houses like Hogarth's House (about 0.9 miles south) are a reminder that the area around Acton Green 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 is traditional sand mastic. In a converted house or block, who looks after the windows depends on the lease, so check that before you book.
Managing a site like Ark Priory Primary Academy? Then its window and door frames need their mastic kept sound, just like a home’s. Rented homes near South Acton 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.
Acton Green is about 2 miles east of Ealing, in Greater London. Anywhere in W4, we can carry out window mastic at your property. Our Greater London coverage runs to 764 places, and Acton Green is one of them. London is on our list too, about 7 miles from Acton Green.
Work in W4, W3 and W2 works the same way as everywhere else we cover. If you need window mastic at a property on Meon Road, Kent Road and Bollo Lane or anywhere close by, we can help. If you are just outside Acton Green, we cover Bedford Park (1 mile east), Acton (1 mile north), Acton Vale (1 mile north-east), South Acton (1 mile west) and Hanger Hill (2 miles north-west). Further out, we also cover London (7 miles east), City of Westminster (5 miles east), Marylebone (5 miles east), Kensington (3 miles east), St Pancras (7 miles east) and Shoreditch (8 miles east).
Landmarks near Acton Green
Around Acton Green, our work takes us to homes and buildings near The Duke Of Sussex Public House, Library for Iranian Studies and Turnham Green and the streets around them. Also close by are Leap Service - the National Autistics Society (0.6 miles north-west) and Ark Soane Academy (0.7 miles north-west). There’s a railway station in Acton Green itself: South Acton station. Other landmarks nearby include Livat Hammersmith (1.7 miles east) and Queen Charlotte's and Chelsea Hospital (1.6 miles north-east). The countryside around Acton Green includes Kew Gardens Lake and Castlebar Hill.
Different surfaces, different methods
Composite doors
A composite door normally sits in a plastic outer frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. Most leaks start at the bottom corners, so they get particular care.