Greater London · England
Sand mastic for sash & case windows in Waddon, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Waddon, backed by a one-year guarantee. Ask us for a quote.
- Failed mastic on an exposed elevation
- Gaps where the frame meets the masonry
- Mastic dropping out of the joint
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Check with your local planning authority if your home is listed
- Avoid patching sand mastic with silicone
- Plan mastic work ahead of painting
- Go gently near the mastic when preparing windows
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.
How we handle sand mastic in Waddon
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. If you are dealing with gaps between timber frames and stone or brick and window mastic to renew ahead of painting, we can put it right, whatever the surface.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease generally says who is responsible for the windows, so it’s worth checking before booking, and access in Waddon is something to talk through when you book.
A one-year guarantee comes as standard, so you’re covered after we’ve gone.
- Location
- Waddon (CR0, CR2, SM6)
- Region
- Greater London
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Brick reveals
We rake out the old mastic and pack deep voids before the new mastic goes in.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.
Common questions in Waddon
Do you work for landlords with property near Waddon station?
Yes. We work for landlords and letting agents as well as homeowners. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
Can parking be tricky for a visit in Waddon?
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 replace silicone on a period window with sand mastic?
Yes, we do this often. All the old silicone is removed first so the mastic beds in well.
Where are you based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
What exactly is sand mastic?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Quotes for sand mastic in Waddon
The price is agreed before any work begins. It’s based on:
- When we can work, for business premises
- The number and length of the joints
- Which sealant suits the joint
- The old material and how stubborn it is
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
What to tell us when you ask for a quote:
- How we’d reach the joints
- A few pictures by email, if you can
- Roughly how big the job is
- Where the property is
Want a quote for sand mastic? Please call 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and send you a clear quote before work begins.
What we can’t put right
A few problems are outside what sealant work can do:
- Crumbling stone or brickwork round the window
- Broken panes
- Timber that has rotted
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Joints and surfaces we work on
- Brick reveals
- Timber door frames
- Stone surrounds
- Period & listed homes
- Tenement windows
- Sash and case windows
What sand mastic looks like in Waddon
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as Aerodrome Primary Academy are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. Waddon is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you live in an older home near Church of St George, the joint between an old wall and a newer frame is usually the first place rain gets in.
Waddon is about 1 mile west of Croydon, in Greater London. For sand mastic in and around Waddon, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We are based in Crawley and cover Greater London. 764 places in Greater London are on our list, large and small. London is on our list too, around 9 miles away.
Every address in CR0, CR2 and SM6 is covered for sand mastic. We cover properties on Abbey Road, Alton Road and Epsom Road and the roads around them. Neighbouring places we cover for sand mastic include Old Town (1 mile north-east), Bandonhill (1 mile west), Beddington (1 mile north-west), Russell Hill (1 mile south-west) and Roundshaw (1 mile south-west). Larger places within reach include London (9 miles north), City of Westminster (11 miles north), Marylebone (11 miles north), Kensington (10 miles north), St Pancras (11 miles north) and Shoreditch (11 miles north).
What’s near Waddon
In Waddon, that means homes and buildings near St Andrew's CofE School, Rutherford School and Duppas Hill. There’s a railway station in Waddon itself: Waddon station. Other landmarks nearby include St George's Walk (0.9 miles north-east) and Purley War Memorial Hospital (1.7 miles south). The countryside around Waddon includes Duppas Hill and Roundshaw Downs.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Places near Waddon
Also in Waddon
The process
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 a few hours for a single window, longer for several. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Clear the area around the work
- Mention if the joints have been sealed before
How to get a quote
We quote each job on its own. Simply phone 0345 464 0079 or send us an email and describe the job, and pictures are welcome.
Advice
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 for the work.