Greater London · England
Sand Mastic in Sanderstead
We cover Sanderstead for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Cracked mastic round a front door frame
- Modern sealant on a period surround
- Draughts and rain around sash boxes
Sanderstead homes and the weather
Historic houses like Addington Palace (about 2.3 miles north-east) are a reminder that the area around Sanderstead has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of All Saints, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you let a flat or house near Riddlesdown station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Sanderstead is about 2 miles east of Purley, in Greater London. Anywhere in CR2, we cover sand mastic for homes and businesses. 764 places in Greater London are on our list. London is on our list too, about 11 miles from Sanderstead.
Postcode districts we cover here for sand mastic: CR2 and CR8. Sand mastic is available to properties on Hyde Road, Brian Avenue and Sundown Avenue. Sanderstead is on the A2022, which makes it straightforward to reach. Other places close to Sanderstead include Riddlesdown (1 mile south-west), Kenley (1 mile south-west), South Croydon (1 mile north-west), Selsdon (1 mile north-east) and Hamsey Green (1 mile south-east). We also work in nearby towns such as London (11 miles north), City of Westminster (13 miles north), Marylebone (13 miles north), Kensington (12 miles north-west), St Pancras (13 miles north) and Shoreditch (13 miles north).
Near you in Sanderstead
Typical jobs here are in homes near Selsdon Park Hotel, Littleheath Woods and Riddlesdown Collegiate and the streets around them. Sanderstead’s nearest station is Riddlesdown station, about 0.8 miles west of the centre. Nearby you will also find Purley War Memorial Hospital (1.4 miles west) and Croydon Airport Visitor Centre (2.1 miles north-west). For a walk, there’s Duppas Hill and Foxley Wood.
Sand mastic in Sanderstead
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. If you are dealing with weathered mastic on the most exposed windows and open joints round the window box, we can put it right, on period & listed homes, stone surrounds and sash and case windows alike.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, letting in draughts and water.
Our work is backed for twelve months, in Sanderstead and everywhere else we cover.
- Place
- Sanderstead (CR2, CR8)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together, and we’re fully insured.
What sealant work cannot fix
It helps to know what we cannot do too:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Masonry that needs repairing
- Decisions on consent for listed homes
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Sash and case windows
- Stone surrounds
- Timber door frames
- Brick reveals
- Tenement windows
- Period & listed homes
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours for a single window, longer for several. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Sanderstead. It helps if you can point us to a visitor permit or a bay close to the door.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any previous sealing or DIY attempts
- Keep children and pets away from the work area
How to get a quote
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear quote before any work starts.
Related advice
Places near Sanderstead
Other services in Sanderstead
Common questions in Sanderstead
Can you do sand mastic in Sanderstead?
Yes. Our work covers London and the South East, and Sanderstead is part of that. Just call 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear price.
Do you work for landlords with property near Riddlesdown station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned.
Is it messy?
Very little: the area around the joints is protected first, and we tidy up before we go.
What should I tell you?
A short description and the location, with pictures by email if possible. If we need more, we’ll ask.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
How long does sand mastic take?
Typically it takes a few hours for a single window, longer for several. Larger jobs naturally take longer.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Look over the window mastic once a year
- Leave the new mastic unpainted
- Keep sills and gutters clear so water drains away
- Avoid patching sand mastic with silicone
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger.
What affects the quote in Sanderstead
Your quote is based on your job. We take into account:
- How easy the joints are to reach
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Helping us quote
When you contact us, it’s useful to know:
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
- The problem you’ve noticed
- Any access issues, like height or stairs
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
What we’re called out for in Sanderstead
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows.
Common reasons people contact us include:
- Wind and rain getting in round a sash window
- Open joints round the window box
- Old cement repairs round a window that have failed
- Mastic round period door frames that has failed
Schools such as Gresham Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Before booking anyone
- How long the guarantee is
- What insurance they hold
- Is the old sealant removed completely?
- Whether you can choose the colour
Can I do it myself?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.