Greater London · England
Window Mastic in Fulham
Professional window mastic in and around Fulham, with old sealant always removed completely.
- Old mastic that has gone black or come away
- Untidy mastic left by window fitters
- Draughts coming in around windows and doors
How the job changes by surface
Window sills
Where a sill meets brick or render, the ends often crack first. We reseal them so rain can’t run into the wall.
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so we pay close attention there.
Window mastic for homes and businesses in Fulham
Every window and door frame has a gap around it, and mastic is what closes it. Once that seal fails, wind and rain find the gap. The old mastic is removed and the joint resealed with a flexible exterior sealant. We work on uPVC windows, composite doors and timber windows & doors, and the jobs we see most are damp patches on the reveal after heavy rain and draughts coming in around windows and doors.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease normally says who is responsible for the windows, so it’s worth checking before booking.
Our work is backed for twelve months.
- Place
- Fulham (SW6, W6, W14)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Quotes for window mastic in Fulham
We quote each job individually. These are the things that affect it:
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- Access and height
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- What’s wrong with the joints now
- Whether it’s a home or a business
- Where the job is, and your postcode
- Any access issues, like height or stairs
For window mastic in Fulham, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
Why it’s worth doing now in Fulham
Choosing the product is half the job. Interior caulk and bathroom silicone are not made for exterior frame joints. A low-modulus exterior sealant keeps its stretch through hot and cold weather. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Fulham, the repair is bigger than the sealant job would have been.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Why book with us
- Old sealant always removed completely
- An ARBOMaster approved applicator
- We leave the area clean and tidy
- Experience in homes, commercial sites and hotels
See our cost guide or customer reviews.
What we do, step by step
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the work takes anything from an hour or two to a full day, depending on how many frames there are for a typical job. In a London area like Fulham, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We check how each frame can be reached safely.
- All the failed sealant is cut away.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Mention any tricky access
- Tell us about any water getting in
- Mention if the joints have been sealed before
Ask for a quote
To get a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Advice
Nearby places to Fulham
Also in Fulham
Fulham homes and the weather
In a converted house or block, who looks after the windows depends on the lease, so check that before you book. With historic houses such as Fulham Palace (about 0.7 miles south-west) nearby, there’s older building stock in the area around Fulham 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 St Johns Walham Green Church of England Primary School, its window and door frames need their mastic kept sound, just like a home’s. For landlords with property near West Brompton station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Fulham is about 2 miles south of Kensington, in Greater London. Whether you’re in the middle of Fulham or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Fulham is one of 764 towns and villages in Greater London we cover for window mastic.
We cover every part of the SW6, W6 and W14 postcode area for window mastic. Local streets include Lampeter Square, Fulham High Street and Hurlingham Square, all of which we cover. Main roads around Fulham include the A219 and A304, so getting to you is simple. Other places close to Fulham include West Kensington (1 mile north), North End (1 mile north), Putney (1 mile south-west), Brook Green (1 mile north-west) and Hammersmith (2 miles north-west). We also work in nearby towns such as London (5 miles east), City of Westminster (3 miles north-east), Marylebone (4 miles north-east), St Pancras (5 miles north-east), Shoreditch (6 miles north-east) and Walthamstow (11 miles north-east).
Around Fulham
Locally, jobs take us to homes and businesses close to Parsons Green (park), Fulham Cross Girls' School and Language College and The Cock pub, among other places. Nearby too are Queensmill School (0.7 miles south-east) and Polish Library POSK in London (1.7 miles north-west). For rail, the closest station is West Brompton station, roughly 0.8 miles north-east. Well-known places in the area include Chelsea Stadium Tour And Museum (0.8 miles east) and Putney Exchange (1.1 miles south). Not far away are Battersea Park Lake and Campden Hill.
FAQs for Fulham
Can you help a landlord with a rental near West Brompton station?
Yes. We work for landlords and agents as well as homeowners. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Is parking an issue for window mastic in Fulham?
Parking in Fulham, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
Do you guarantee window mastic?
Yes, for 12 months. A yearly look at the joints helps them last.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Are you insured?
Yes. We are fully insured, and we have been doing sealant work for more than 20 years.
Can you do upstairs windows?
Yes, if safe access is possible. For high or awkward windows, we will tell you what access is needed.
What we cannot put right
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- Faulty window hardware
- A frame that has rotted at the joint
- A door that needs adjusting, rehanging or new seals
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Aluminium frames
- Timber windows & doors
- Composite doors
- Patio & French doors
- uPVC windows
- Window sills
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Common problems we fix in Fulham
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
The most common problems we see are:
- Gaps between the frame and the inside reveal
- Hard, cracked sealant around windows
- Draughts coming in around windows and doors
- Cracked sealant at the sill ends
Homes close to St. Peter's Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Questions to ask before you book
- How long the guarantee is
- Who does the work, and how experienced they are
- What happens if the job turns out different
- Whether you can choose the colour