Greater London · England
Window Mastic in Falconwood
Specialist window mastic for Falconwood: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- A bead that doesn’t match the frame
- Untidy mastic left by window fitters
- Damp patches on the reveal after heavy rain
How the visit works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a morning for a couple of windows and a door, and the area is left clean. In a London area like Falconwood, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- On commercial sites, let us know about site rules
- Mention if the joints have been sealed before
How to get a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. A few photos by email make the job easier to understand.
Advice
How we handle window mastic in Falconwood
Over two decades of sealing frames has taught us which products suit which walls. We’re fully insured ARBOMaster approved applicators, and we give a 12-month guarantee on the work. We work on composite doors, uPVC windows and aluminium frames, and the jobs we see most are whistling draughts around closed windows and rushed sealant from a window installation.
London has a lot of flats and conversions, where windows are often on upper floors. Who looks after the outside of the frames can depend on the lease, so check that first.
All our work is covered by a 12-month guarantee.
- Place
- Falconwood (DA16, DA15, SE9)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Also near Falconwood
Other services in Falconwood
What affects the quote in Falconwood
Your quote is based on your job. We take into account:
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
- The size of the job
- How many rooms, windows or areas are involved
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 the work is at height. Your quote takes all of that into account.
What we need to know
To help us quote quickly, please include:
- The address or postcode of the job
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
- The rough size of the job
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or drop us an email with the details, and photos are welcome.
Why act early in Falconwood
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Falconwood, the repair is bigger than a sealant job.
Combining jobs into one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. We will send you a clear quote for the lot.
Why book with us
- Sanitary silicone with an anti-fungal additive in wet areas
- A 12-month guarantee on all work
- We never seal over old sealant
- White, clear, grey or another colour, product permitting
Read our cost guide and customer reviews.
Different surfaces, different methods
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.
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We seal the frame and let you know about anything else.
Frames and glazing around Falconwood
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book. With historic houses such as Danson House (about 1 mile east) nearby, there’s older building stock in the area around Falconwood as well as newer homes. 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 Bishop Ridley Church of England VA Primary School, the mastic around its windows and doors needs looking after like any other building’s. In the older streets around Bishop Ridley Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. As a London address, Falconwood can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Falconwood is about 2 miles north-east of Eltham, in Greater London. Every kind of property in Falconwood can book us for window mastic. The work is guaranteed for a year. We cover 764 towns and villages across Greater London. We also work in London, about 9 miles from Falconwood.
Here we cover the DA16, DA15 and SE9 postcode area for window mastic. Streets in the area include Hook Lane, Gordon Road and Kent Avenue. We also cover Blackfen (1 mile south), East Wickham (1 mile north), Avery Hill (1 mile south-west), Shooter's Hill (1 mile north-west) and New Eltham (2 miles south-west). Further out, we also cover London (9 miles west), City of Westminster (11 miles west), Marylebone (11 miles west), Kensington (13 miles west), St Pancras (10 miles north-west) and Shoreditch (9 miles north-west).
Local landmarks in Falconwood
Locally, jobs take us to homes and businesses close to The Plough and Harrow pub, Shoulder of Mutton Green and Harris Academy Falconwood. Falconwood’s nearest station is Welling station, roughly 0.5 miles north-east of the centre. Well-known places in the area include Broadway Shopping Centre (2.2 miles east) and Memorial Hospital (1.4 miles north-west). Not far away are The Tarn and Summer Hill.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Make sure the drainage slots are not blocked
- Repaint timber before it’s bare
- Wash the frames with mild soapy water
- Look round the frames every year or so
Check the drainage slots in the frames aren’t blocked, so rain drains out rather than building up at the sealant.
Water gets in quietly when mastic fails. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Can I do it myself?
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.
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
Your questions about window mastic in Falconwood
Is parking an issue for window mastic in Falconwood?
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 work for landlords with property near Welling station?
Yes. We work for landlords and letting agents as well as householders. Just call 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear price.
Do the sealants smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
How do I get a quote for window mastic in Falconwood?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Can you quote for more than one area?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint before we leave.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
How long does it take to reseal the windows on a house?
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.