Greater London · England
Sand mastic for sash & case windows in Addington, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Addington, with a one-year guarantee on every job. Ask us for a quote.
- Draughts and rain around sash boxes
- Mastic round period door frames that has failed
- Cement or filler used on old window joints that has cracked
What sand mastic looks like in Addington
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Addington Palace (about 0.4 miles west) nearby, there’s older building stock in the area around Addington 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.
As a London address, Addington can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. For landlords with property near West Wickham station, older sash windows in a rental need their mastic kept sound to keep the weather out. Homes close to Church of St Mary include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Addington is about 3 miles south-east of Ashburton, in Greater London. Every kind of property in Addington can book us for sand mastic. The work is guaranteed for a year. 764 places in Greater London are on our list, large and small. Our London page covers work nearby.
Here we cover the CR0, CR2 and BR4 postcode area for sand mastic. Whether your property is on Lodge Lane, Falconwood Road and Addington Village Road or anywhere close by, our applicators can take on the job. We also cover the places around Addington: 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).
Around Addington
In Addington, that means homes and buildings near Addington Park and John Ruskin College, among other places. Addington’s nearest station is West Wickham station, roughly 1.7 miles north-east of the centre. Nearby you’ll also find National Psychosis Unit (1.6 miles north) and St George's Walk (3.1 miles west). The countryside around Addington includes Bramley Bank and Duppas Hill.
How we handle sand mastic in Addington
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. If you are dealing with patchy fillers round a sash window and draughts and rain around sash boxes, we can put it right, on stone surrounds, timber door frames and sash and case windows alike.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease generally says who is responsible for the windows, so it’s worth checking before booking.
Big or small, it’s backed by our one-year guarantee.
- Place
- Addington (CR0, CR2, BR4)
- Region
- Greater London
- Cover
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Addington
Also in Addington
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Your questions about sand mastic in Addington
Can parking be tricky for a visit in Addington?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Can you do sand mastic in Addington?
Yes, Addington is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
Can you replace silicone on a period window with sand mastic?
Yes. The silicone is cut out and the joint cleaned before the sand mastic goes in.
Can I paint the new mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Are you insured?
Yes. Mr Mastic is fully insured.
Where are you based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
What exactly is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder for the joint between timber frames and masonry.
Can I choose the sealant colour?
Most of the time, yes. We will tell you which colours the right product comes in and agree one before we start.
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Ask a joiner to look at soft timber first
- Find out about consent before window work on a listed home
- Do not paint over the new mastic
- Keep modern sealant off the mastic
Avoid painting over the new mastic, which is the traditional advice. If you’re redecorating, ask us first.
Sound mastic protects the frame. Failed mastic lets water reach the timber and timber that stays wet can rot.
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Decayed frames that need repair
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Addington
- Tenement windows
- Sash and case windows
- Brick reveals
- Timber door frames
- Period & listed homes
- Stone surrounds
What the job involves on each surface
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
Leave it or put it right?
An open joint round the frame lets weather in. Water can get to the frame and the masonry, so dealing with it now protects both. In a flat in Addington, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Leaving a failed joint normally makes the job bigger, not smaller. If you are unsure, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
Why choose Mr Mastic in Addington
- Any old sealant cut out fully, not covered over
- Tidy, careful work
- Experience in homes, commercial sites and hotels
- 12-month guarantee on every job
Take a look at our cost guide and what customers say.
How it works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The work itself takes anything from a few hours to a full day, depending on how many windows, including the tidy-up. For a job in Addington, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Mention any parking rules near the property
- Move anything stored near the joints
- Mention any tricky access
Get a quote
For sand mastic in Addington, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Read more
Landlord and commercial work in Addington
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
We work for letting agents and landlords as well as householders. Sealant work between tenants keeps a property looking cared for.