Greater London · England
Window & door mastic in Long Ditton, Greater London
Specialist window mastic for Long Ditton: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Sealant in the wrong colour for the frame
- Cracked internal joints between frame and plaster
- Rain getting in at the frame or under the sill
Window mastic in Long Ditton
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through and quietens the whistle on windy days. If the draught is through the window seals instead, we will tell you. We work on timber windows & doors, composite doors and uPVC windows, and people most often call us about old mastic that has gone black or come away and draughty joints inside around the window.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, which is when draughts and damp patches appear in homes in Long Ditton.
Big or small, it’s backed by our one-year guarantee in Long Ditton and across Greater London.
- Place
- Long Ditton (KT6)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How the job changes by surface
uPVC windows
The frame is cleaned with a product that will not harm the plastic, then the new bead is laid against the frame and the wall.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so a flexible sealant is essential. We seal onto sound, dry paintwork or timber.
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Avoid blasting the frames with a pressure washer
- Avoid harsh chemicals near the mastic
- Walk round the house once a year and look at the joints
- Use gentle cleaners on frames and sealant
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
Why deal with it now?
Redecorating is a good moment to renew the mastic. A clean new bead makes new paint or render look finished, and it’s easier while the walls are being worked on anyway. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in Long Ditton.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why Long Ditton customers choose us
- Sealant colour chosen to suit
- A 12-month guarantee on all work
- Colour agreed with you before we start
- 4.9 on Google from 180+ five-star reviews
See our cost guide or customer reviews.
Long Ditton: your questions answered
Can you help a landlord with a rental near Surbiton station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Can you do window mastic in Long Ditton?
Yes. Our work covers London and the South East, and Long Ditton is part of that. Just phone 0345 464 0079 or email us with a few details of the job.
Do you seal inside as well as outside?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
Can you do upstairs windows?
Normally, yes. Access is planned before work begins.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Long Ditton and the rest of Greater London, along with the rest of our area.
Can you do several jobs on one visit?
Yes. More than one area can be quoted together.
Can you work on commercial sites?
Yes. We’ve worked for hotels, offices and other businesses, and we are fully insured.
Windows and doors in Long Ditton
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. With historic houses such as Hampton Court Palace (about 1.5 miles north-west) nearby, there’s older building stock in the area around Long Ditton as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
If you let a flat or house near Surbiton station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. As a London address, Long Ditton can be tricky for parking: let us know about parking bays, permits or a driveway. In the older streets around Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Long Ditton is about 1 mile south-west of Surbiton, in Greater London. If you need window mastic in Long Ditton, please call 0345 464 0079 or send us an email for a quick quote. We cover Greater London from our Crawley base. Long Ditton is one of 764 towns and villages in Greater London we cover for window mastic. For nearby work, see our London page.
We cover every part of KT6 for window mastic. Whether your property is on Pound Close, Fleece Road and St Chads Close or a nearby road, we can help. Nearby, we also carry out window mastic in Ditton Hill (1 mile south), Seething Wells (1 mile north), Thames Ditton (1 mile west), Hinchley Wood (1 mile south-west) and Surbiton Park (1 mile north-east). Larger places within reach include London (12 miles north-east), City of Westminster (11 miles north-east), Marylebone (12 miles north-east), Kensington (9 miles north-east), St Pancras (13 miles north-east) and Shoreditch (14 miles north-east).
Landmarks near Long Ditton
Locally, jobs take us to homes and businesses close to Shrewsbury House School, Stokes Field and Raintree pub, among other places. Long Ditton’s nearest station is Surbiton station, roughly 0.7 miles north-east of the centre. Nearby you’ll also find Tolworth Hospital (1.3 miles east) and Metropolitan Police Mounted Branch Museum (1.5 miles west). Not far away are The Lake and Kingston Hill Road area.
Landlord and commercial work in Long Ditton
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
What affects the cost of window mastic
Your quote is based on your job. We take into account:
- The old material and how stubborn it is
- Access and height
- Whether there’s mould to deal with
- Working hours on commercial sites
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, ring 0345 464 0079 or email us for an honest opinion and a quote.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Pictures of the joints, sent by email
- The rough size of the job
- How we’d reach the joints
- If someone has resealed it before
If you are in Long Ditton and need window mastic, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
Can I do it myself?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Nearby places to Long Ditton
Also in Long Ditton
The process
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before any work starts. Most jobs take a few hours for a few frames, or a day or more for a whole house. In Long Ditton, 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 confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- 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.
Before we arrive
- Try not to wet indoor joints just before the visit
- Let us know if you’ve seen damp or leaks
- Plan for the work area to be out of bounds to pets and children
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that’s easy.