Greater London · England
Teddington Window Mastic
Window mastic across Teddington and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- A bead that doesn’t match the frame
- Old mastic that has gone black or come away
- Untidy mastic left by window fitters
Window mastic for homes and businesses in Teddington
Behind a thin line of old mastic there’s sometimes a deep void. Packing it solid with sealant gives a joint that can’t flex, so we fit backing rod to set the right depth. That way the new bead bonds to the frame and the wall only. If you are dealing with gaps left after new windows were fitted and cracked internal joints between frame and plaster, we can put it right.
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 Teddington is something to talk through when you book.
Each job carries a 12-month guarantee.
- Where
- Teddington (TW11, TW12, TW2, TW1)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
After the cure time, these simple habits help:
- Keep timber frames painted
- Keep paint off silicone joints
- Clean frames with a soft cloth and soapy water
- Air rooms to keep condensation down around windows
Silicone can’t generally be painted, so mention any painting plans before any work starts. We can use a paintable sealant where that matters.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Places near Teddington
What else we do in Teddington
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
FAQs for Teddington
Do you cover Teddington for window mastic?
Yes, Teddington is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Is parking a problem for a job in Teddington?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
I’m a tenant. Can you help?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Will there be a smell?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
What does window mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or drop us an email and tell us what needs doing and where.
Can you match the sealant to my frames?
Usually, yes. Tell us the frame colour when you get in touch and we will match it as closely as we can.
Does the work come with a guarantee?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
For landlords and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
What affects the quote in Teddington
The price is agreed before any work begins. It’s based on:
- The number of rooms or windows
- Mould in or behind the old joints
- When we can work, for business premises
- The size of the job
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
What to tell us for a quote
What to tell us when you ask for a quote:
- Where the job is, and your postcode
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
- Photos by email, if that’s easy
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or email us.
Do you need window mastic in Teddington?
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar didn’t grip properly, and it lets go sooner than it should.
Any of these means the joints need attention:
- Whistling draughts around closed windows
- Cracked internal joints between frame and plaster
- Hard, cracked sealant around windows
- Gaps left after new windows were fitted
Teddington is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
What your quote should include
- Is VAT in the price?
- Whether they’re fully insured
- Whether the sealant suits the joint
- The length of the guarantee
Surface by surface
uPVC windows
We clean the frame edge carefully so the plastic is not marked, then the sealant goes in between frame and wall and tooled smooth.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so a flexible sealant is essential. The paint or stain needs to be sound where the sealant meets it.
What window mastic looks like in Teddington
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book.
Letting a property close to Teddington station? Then renewing tired window mastic between tenants heads off draught and damp complaints. For site and facilities teams at buildings such as St Mary's and St Peter's Church of England Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Teddington is about 5 miles west of Wimbledon, in Greater London. Our applicators cover window mastic for homes and businesses in Teddington, as part of our work across Greater London. Across Greater London, we cover 764 places, Teddington among them. There’s also a page for London, about 11 miles away.
Every address in TW11, TW12, TW2 and TW1 is covered for window mastic, from the main roads to the quietest streets. Whether your property is on Station Road, High Street and Church Road or a nearby road, our applicators can take on the job. You will find Teddington on the A311 and A313, so it’s easy for us to get to. We also cover the places around Teddington: Strawberry Hill (1 mile north), Fulwell (1 mile north-west), Hampton Hill (1 mile west), Ham (1 mile north-east) and Eel Pie Island (1 mile north). Larger places within reach include London (11 miles north-east), City of Westminster (10 miles north-east), Marylebone (10 miles north-east), Kensington (8 miles north-east), St Pancras (12 miles north-east) and Shoreditch (13 miles north-east).
Around Teddington
Around Teddington, our work takes us to homes and buildings near Bushy Park, Turing House School and Newland House School. Teddington has its own railway station: Teddington station. Nearby you will also find Teddington Memorial Hospital (under half a mile west) and Eel Pie Island Museum (1.5 miles north). The countryside around Teddington includes Ham Lands and Kew Gardens Lake.
What happens on the day
There’s no need to move everything out, just the space around the work. We protect the rest, and the job takes anything from an hour or two to a full day, depending on how many frames there are for a typical job. In Teddington, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- First, we go round the frames with you and agree the list.
- 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
- Let us know about stairs, lifts or work at height
- Clear items away from the joints we’re working on
- Let us know if you’ve seen damp or leaks
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.