Greater London · England
Window Mastic in Addiscombe
Mastic around window and door frames, sills and patio doors in Addiscombe, with a one-year guarantee on every job. Ask us for a quote.
- Cracked internal joints between frame and plaster
- A bead that does not match the frame
- Water coming in at the bottom corners of a door
What the job involves on each surface
Composite doors
Composite doors are normally hung in an uPVC-type frame, and the joint around it is sealed like a window. We match the colour to the frame.
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. We seal onto sound, dry paintwork or timber.
How we handle window mastic in Addiscombe
The new joint does not have to be white. White, brown, anthracite grey, black and clear sealants are all available, so the bead blends with the window rather than framing it. Typical jobs include damp patches on the reveal after heavy rain and draughts coming in around windows and doors, on timber windows & doors, patio & French doors and composite doors.
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.
The work is covered for a year after we finish. If anything is not right with it, ring 0345 464 0079 or send us an email.
- Place
- Addiscombe (CR0, SE25, CR9)
- Region
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Quotes for window mastic in Addiscombe
Every job gets its own quote. This is what makes a difference:
- When we can work, for business premises
- How much old sealant there is and how hard it is to remove
- The number and length of the joints
- The type of sealant required
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will explain what it covers.
Asking for a quote
There’s no need for technical detail. Just tell us:
- The rough size of the job
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- The problem you’ve noticed
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
How it works
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes anything from an hour or two to a full day, depending on how many frames there are and we leave things clean and tidy. In Addiscombe, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We check each frame and agree which ones need doing.
- 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.
- Finally we tidy up and check each joint.
How to prepare
- Clear items away from the joints we’re working on
- Mention if the joints have been sealed before
- Let us know if you’ve seen damp or leaks
Getting a quote
Want a quote for window mastic? Please phone 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and send you a clear quote before work begins.
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Towns and villages near Addiscombe
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What happens if it’s left?
Choosing the product is half the job. Interior caulk and bathroom silicone aren’t 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 Addiscombe, the repair is bigger than the sealant job would have been.
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 the work is at height. Your quote takes all of that into account.
Why Addiscombe customers choose us
- We agree the colour with you first
- Trusted Arbo and Everbuild sealants
- Experience in homes, commercial sites and hotels
- Sealant colour chosen to suit
Take a look at how sealant jobs are priced and what customers say.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
For anyone letting property in or around Addiscombe, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
Addiscombe questions
Do you work for landlords with property near Norwood Junction station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Is parking an issue for window mastic in Addiscombe?
Parking in Addiscombe, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Addiscombe, along with the rest of our area.
Do you come to Addiscombe?
Yes. We work in Addiscombe and the rest of Greater London, as part of our work across South East England, London and Scotland. To book, phone 0345 464 0079 or email us.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or send us an email.
Can I paint over the new sealant?
Not if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
How much does window mastic cost in Addiscombe?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Addiscombe homes and the weather
With historic houses such as Addington Palace (about 2 miles south-east) nearby, there’s older building stock in the area around Addiscombe 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. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as St Mildred's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. As a London address, Addiscombe can be tricky for parking: let us know about parking bays, permits or a driveway. For site and facilities teams at buildings such as Oasis Academy Shirley Park, its window and door frames need their mastic kept sound, just like a home’s.
Addiscombe is about 2 miles north-east of Croydon, in Greater London. From the centre of Addiscombe to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our Greater London coverage runs to 764 places, and Addiscombe is one of them. Our London page covers work nearby.
We cover every part of the CR0, SE25 and CR9 postcode area for window mastic. If you need window mastic at a property on Grant Road, Capri Road and Coe Avenue or a nearby road, our applicators can take on the job. With the A232 close by, Addiscombe is simple for us to get to for window mastic. Nearby, we also carry out window mastic in Shirley Oaks (1 mile east), Ashburton (1 mile north), Woodside (1 mile north), Shirley (1 mile east) and Monks Orchard (1 mile east). Further out, we also cover London (8 miles north), City of Westminster (10 miles north), Marylebone (10 miles north), Kensington (10 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).
Landmarks near Addiscombe
We work in homes and buildings around The Woodside Academy, The Cricketers pub and Ashburton Park, among other places. Addiscombe’s nearest station is Norwood Junction station, about 1.2 miles north. A little further out are St George's Walk (1.5 miles west) and Crystal Palace Museum (2.7 miles north). For a walk, there’s Duppas Hill and Bramley Bank.
When it isn’t the sealant
A few problems are outside what sealant work can do:
- Worn gaskets, brush seals or a door that has dropped
- Soft or decayed wood in the frame
- Broken hinges, locks or handles
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before booking.
Joints and surfaces we work on
- Aluminium frames
- Window sills
- Patio & French doors
- uPVC windows
- Timber windows & doors
- Composite doors