Greater London · England
Window & door mastic in Addington, Greater London
Mastic around window and door frames, sills and patio doors for homes and businesses in Addington and across Greater London. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Draughty joints inside around the window
- Gaps where the sill meets the wall
- Damp patches on the reveal after heavy rain
Your questions about window mastic in Addington
Is parking a problem for a job in Addington?
Parking in Addington, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
I let a flat near West Wickham station. Can you help?
Yes, we work for landlords and agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us and we are fully insured.
Can new window sealant be painted?
It depends on the sealant. Some hybrid sealants can be painted; silicone cannot. Tell us if you are decorating and we will choose accordingly.
Do you work in Addington?
We do. Our applicators work in Addington.
Are you an approved applicator?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
How do I get a quote for window mastic in Addington?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we will talk you through it.
Window mastic in Addington
A cold draught around a closed window often comes from the frame edge. 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’ll tell you. Typical jobs include gaps where the sill meets the wall and draughts coming in around windows and doors, across aluminium frames, window sills and timber windows & doors.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Addington as anywhere.
Each job carries a 12-month guarantee.
- Place
- Addington (CR0, CR2, BR4)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Why it’s worth doing now in Addington
Resealing frames is a short job: it takes most of a day for a typical house, less for a few frames. Wait for damp to appear and there may be plaster and decorating to sort out too. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
The cost depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before work begins.
What you get with us
- A choice of colours where the product allows
- Old sealant always removed completely
- Experience in homes, commercial sites and hotels
- Neat joints and a tidy finish
See our cost guide and our reviews.
Addington homes and the weather
Historic houses like Addington Palace (about 0.4 miles west) are a reminder that the area around Addington has older buildings as well as new. 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. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
As a London address, Addington can be tricky for parking: let us know about parking bays, permits or a driveway. Homes close to Church of St Mary include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Addington is about 3 miles south-east of Ashburton, in Greater London. Homes, rented property, offices and hotels in Addington can book us for window mastic. Every job comes with our 12-month guarantee. Addington is one of 764 places in Greater London where we work for window mastic. There’s also a page for London, roughly 10 miles from Addington.
We cover every part of CR0, CR2 and BR4 for window mastic. If you need window mastic at a property on Lodge Lane, Falconwood Road and Addington Village Road or anywhere close by, we can help. If you are just outside Addington, we cover Coney Hall (1 mile north), Forestdale (1 mile south), Spring Park (1 mile north), New Addington (1 mile south-east) and Selsdon (1 mile south-west). Within a short drive, we also cover London (10 miles north), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (12 miles north-west), St Pancras (12 miles north) and Shoreditch (12 miles north).
Landmarks near Addington
In Addington, that means homes and buildings near Addington Park and John Ruskin College, among other places. The nearest railway station is West Wickham station, about 1.7 miles north-east of the centre. Well-known places in the area include National Psychosis Unit (1.6 miles north) and St George's Walk (3.1 miles west). Green spaces nearby include Bramley Bank and Duppas Hill.
What affects the cost of window mastic
There’s no set price list, because no two jobs are the same. What we look at:
- How much old sealant there is and how hard it is to remove
- The type of sealant required
- How many areas need sealing
- Working hours on commercial sites
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- Access, such as stairs, a lift or height
- The address or postcode of the job
- Roughly how big the job is
- Whether it’s a home or a business
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, phone 0345 464 0079 or send us an email.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Clear any debris from frame drain holes
- Keep solvents and bleach off the sealant
- Do not aim a pressure washer at the joints
- Repaint timber before it’s bare
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. Resealing closes it.
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a few frames, or a day or more for a whole house, and the area is left clean. In Addington, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- On commercial sites, let us know about site rules
- Let us know if you’ve seen damp or leaks
Getting a quote
We quote each job on its own, so start by telling us what you need. Just ring 0345 464 0079 or drop us an email with the details.
Related advice
When to call us in Addington
Older frames were often sealed with products that set hard. Once it’s rigid, every bit of frame movement pulls at it, leaving a hairline gap down one side.
Keep an eye out for these signs:
- Water coming in at the bottom corners of a door
- A bead that does not match the frame
- Mastic that has split away from the wall
- Draughts coming in around windows and doors
If you look after a building such as Applegarth Academy, larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- Whether they seal over old material or remove it
- What happens if the job turns out different
- How the surfaces are prepared before sealing
- How long to leave it before use