Greater London · England
Window Mastic in Old Chiswick
Mastic around window and door frames, sills and patio doors for householders, landlords and businesses in Old Chiswick. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Gaps left after new windows were fitted
- Mastic that’s falling out in pieces
- Cracked or shrunken mastic around the frame
Window mastic for homes and businesses in Old Chiswick
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. If you have cracked or shrunken mastic around the frame and draughts coming in around windows and doors, we can help, whatever the surface.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease normally says who is responsible for the windows, so it’s worth checking before booking, and access in Old Chiswick is something to talk through when you book.
Every job comes with our one-year guarantee, wherever you are in Greater London.
- Place
- Old Chiswick (W4, SW13, W6)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Frames and glazing around Old Chiswick
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
For site and facilities teams at buildings such as The William Hogarth Primary School, the mastic around its windows and doors needs looking after like any other building’s. As a London address, Old Chiswick can be tricky for parking: let us know about parking bays, permits or a driveway. For landlords with property near Chiswick station, renewing tired window mastic between tenants heads off draught and damp complaints.
Old Chiswick is about 2 miles south of Acton, in Greater London. Homes, rented property, offices and hotels in Old Chiswick can book us for window mastic. Every job comes with our one-year guarantee. 764 places in Greater London are on our list, large and small. London is on our list too, around 7 miles away.
Work in W4, SW13 and W6 works the same way as everywhere else we cover. Window mastic is available to properties on Short Road, Quick Road and Paxton Road and the roads around them. If you are just outside Old Chiswick, we cover Turnham Green (1 mile west), Chiswick (1 mile north-west), Grove Park (1 mile west), Barnes (1 mile south) and Hammersmith (1 mile north-east). Larger places within reach include London (7 miles east), City of Westminster (5 miles north-east), Marylebone (5 miles north-east), St Pancras (6 miles north-east), Shoreditch (8 miles east) and Walthamstow (12 miles north-east).
Around Old Chiswick
Typical jobs here are in homes near George and Devonshire pub, The Swedish School and Polish Library POSK in London, among other places. You will also find Turnham Green (0.8 miles north-west) and Chiswick School (0.5 miles south-west). For rail, the closest station is Chiswick station, roughly 0.8 miles south-west of the centre. Nearby you’ll also find Kurdish Museum Library and Archive (0.7 miles north-east) and West London Hospital (1.3 miles east). The countryside around Old Chiswick includes Campden Hill and Kew Gardens Lake.
DIY versus a professional finish
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.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Honest limits
We will always be straight with you, so here’s what new sealant will not do:
- A sash or casement that won’t close properly
- Rotten timber, which needs a joiner first
- Draughts through the window seals rather than the frame
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Joints and surfaces we work on
- uPVC windows
- Composite doors
- Patio & French doors
- Aluminium frames
- Window sills
- Timber windows & doors
Nearby places to Old Chiswick
What else we do in Old Chiswick
FAQs for Old Chiswick
Can parking be tricky for a visit in Old Chiswick?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Do you work for landlords with property near Chiswick station?
Yes, we work for landlords and letting 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.
Where is Mr Mastic based?
We are a Crawley-based firm. We work across South East England, London and Scotland.
Do you work on first-floor windows?
Yes, if safe access is possible. Higher or awkward frames may need extra access, and we’ll confirm what’s needed.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Anthracite grey, black, brown and white cover most frames, with clear as an option.
Will new mastic stop draughts?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
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.
What the job involves on each surface
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. It comes out, deep gaps get backing rod and the joint is resealed.
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.
What affects the cost of window mastic
The quote reflects the job in front of us. We take into account:
- The number of rooms or windows
- Any working-time requirements on site
- The product the joint needs
- Whether there’s mould to deal with
Combining jobs into one visit is generally more efficient than separate visits. You’ll get one clear quote for the whole job.
Helping us quote
What to tell us when you ask for a quote:
- What the problem is, such as mould, gaps, leaks or cracking
- Where the property is
- A few photos by email, if you can
- How many joints, rooms or windows are involved
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job, and we will come back to you with a quote.
How the visit works
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The work itself takes a morning for a couple of windows and a door, including the tidy-up. For a job in Old Chiswick, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Clear the area around the work
- Try not to wet indoor joints just before the visit
- Tell us if parking is tricky
Get a quote
For a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Related advice
Work for landlords, hotels and businesses
Landlords and letting agents in Old Chiswick can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
Housing providers, facilities teams and property managers book us too in Old Chiswick and across Greater London. We can quote a run of properties together, and we’re fully insured.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Clean frames with a soft cloth and soapy water
- Keep paint and stain on wooden frames in good order
- Keep paint off silicone joints
- Air rooms to keep condensation down around windows
Most silicone sealants will not take paint, so mention any painting plans before any work starts. There are paintable sealants for joints that need it.
A failed joint lets water into the wall a little at a time. You might not see it until plaster blows or a damp patch appears inside. Early resealing stops it reaching that point.