Greater London · England
Window & door mastic in Old Town, Greater London
Mastic around window and door frames, sills and patio doors for homes and businesses in Old Town and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Water coming in at the bottom corners of a door
- Draughty joints inside around the window
- Sealant in the wrong colour for the frame
Window mastic in Old Town, done properly
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through. Where the air is getting in through the window itself, we will say so. We’re often asked to deal with damp patches on the reveal after heavy rain and cracked internal joints between frame and plaster, across composite doors, aluminium frames and window sills.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
Every job comes with our 12-month guarantee, wherever you are in Greater London.
- Location
- Old Town (CR0, CR9, CR90)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Frames and glazing around Old Town
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Addington Palace (about 3 miles east) nearby, there’s older building stock in the area around Old Town 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.
Homes close to Croydon Minster include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in. As a London address, Old Town can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Schools such as The Minster Nursery and Infant School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Old Town is about 1 mile north-west of Croydon, in Greater London. From the centre of Old Town to the outskirts, we cover window mastic for every kind of property. Our Greater London coverage runs to 764 places, Old Town among them. London is on our list too, about 9 miles from Old Town.
We cover every part of the CR0, CR9 and CR90 postcode area for window mastic. We cover properties on Park Lane, Fell Road and Abbey Road and the roads around them. We also cover Waddon (1 mile south-west), Broad Green (1 mile north), Beddington (1 mile west), Bandonhill (1 mile south-west) and Russell Hill (2 miles south-west). Larger places within reach include London (9 miles north), City of Westminster (10 miles north), Marylebone (10 miles north), Kensington (10 miles north-west), St Pancras (11 miles north) and Shoreditch (11 miles north).
What’s near Old Town
Locally, jobs take us to homes and businesses close to Rutherford School, The Gun Tavern and St Andrew's CofE School. There’s a railway station in Old Town itself: West Croydon station. Well-known places in the area include Croydon University Hospital (1.2 miles north) and Croydon Airport Visitor Centre (1.3 miles south-west). For a walk, there’s Roundshaw Downs and Duppas Hill.
How it works
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a few frames, or a day or more for a whole house. In a London area like Old Town, 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 check how each frame can be reached safely.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Mention any parking rules near the property
- Mention if the joints have been sealed before
- On commercial sites, let us know about site rules
Get a quote
To get a quote, call 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
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Look round the frames every year or so
- Avoid blasting the frames with a pressure washer
- Avoid harsh chemicals near the mastic
- Keep paint off silicone joints
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
Old Town: your questions answered
Is Old Town in your area for window mastic?
Yes. Our work covers London and the South East, and Old Town is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
I let a flat near West Croydon station. Can you help?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear price.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used.
What does window mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before work begins.
Can you do the inside joint as well?
Yes, we do both. Indoors, we seal between the frame and the plaster or reveal.
What should I tell you?
Let us know what needs doing and where. If we need more, we will ask.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you don’t need to watch us work.
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
What affects the quote in Old Town
The price is agreed before any work begins. It’s based on:
- Any working-time requirements on site
- How easy the joints are to reach
- The product the joint needs
- The number and length of the joints
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you’re unsure, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
What we need to know
What to tell us when you ask for a quote:
- How we’d reach the joints
- If someone has resealed it before
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll talk you through the work.
Towns and villages near Old Town
Other services in Old Town
For landlords and businesses
Landlords and letting agents in Old Town can book us as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Surface by surface
Aluminium frames
Aluminium needs a sealant that bonds to coated metal. We use a neutral-cure product.
uPVC windows
The frame is cleaned with a product that will not harm the plastic, then the sealant goes in between frame and wall and tooled smooth.
Honest limits
We will always be straight with you, so here’s what sealant cannot fix:
- A door that needs adjusting, rehanging or new seals
- Condensation trapped between the panes
- Rotten timber, which needs a joiner first
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before booking.
What we seal
- Composite doors
- Aluminium frames
- Patio & French doors
- Window sills
- Timber windows & doors
- uPVC windows