Greater London · England
Toy's Hill Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Toy's Hill and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Wind and rain getting in round a sash window
- Old sand mastic that has cracked, crumbled or fallen out
- Mastic that needs renewing before redecorating
Sand mastic for homes and businesses in Toy's Hill
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. We work on brick reveals, sash and case windows and period & listed homes, and common reasons people get in touch are silicone on a period window that looks wrong and weathered mastic on the most exposed windows.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
Every job is covered by a one-year guarantee.
- Place
- Toy's Hill (TN16)
- Region
- Greater London
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Signs you need sand mastic in Toy's Hill
Water gets into small cracks in the mastic and pushes it out. Exposed elevations usually fail first.
Most people get in touch when they notice something like this:
- Draughty sash windows at the surround
- Mastic that needs renewing before redecorating
- Mastic dropping out of the joint
- Cracked mastic round a front door frame
Managing a site like Ide Hill Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- How much experience the applicator has
- What preparation is included
- What the cure time is
- Whether you can choose the colour
What the job involves on each surface
Stone surrounds
We take care not to mark the stone when the old mastic comes out.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
The process
All our tools and materials come with us in the van. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take anything from a few hours to a full day, depending on how many windows. In Toy's Hill, 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 the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Tell us if parking is tricky
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, call 0345 464 0079 or email us.
Related advice
Your questions about sand mastic in Toy's Hill
Do you work for landlords with property near Edenbridge station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Can you do sand mastic in Toy's Hill?
Yes. We work across London and the South East, and Toy's Hill is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job.
Can old silicone round a sash window be swapped for sand mastic?
Often, yes. Once the silicone is out and the joint prepared we point it with sand mastic.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
Where are you based?
We work from Crawley. We cover Toy's Hill and the rest of Greater London.
Do you offer different sealant colours?
In most cases you can choose. We’ll explain which colours are available.
How long does sand mastic take to go off?
It forms a skin fairly soon, then hardens over a longer period. The weather and joint depth both affect it.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Towns and villages near Toy's Hill
Also in Toy's Hill
Windows and doors in Toy's Hill
With historic houses such as Chartwell (about 1.1 miles west) nearby, there’s older building stock in the area around Toy's Hill as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. In a converted house or block, who looks after the windows depends on the lease, so check that before booking.
Toy's Hill is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. In the older streets around Church of St Mary at South End of Village Green, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Toy's Hill is about 4 miles south-west of Sevenoaks, in Greater London. If you need sand mastic in Toy's Hill, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We’re based in Crawley and cover Greater London. Toy's Hill is one of 764 places in Greater London we cover for sand mastic. We also work in Crawley, around 16 miles away.
Work in TN16 works the same way as everywhere else we cover. Whether your property is on Scords Lane and Puddledock Lane or anywhere close by, our applicators can take on the job. We also cover the places around Toy's Hill: Ide Hill (1 mile east), Brasted Chart (1 mile north), Goathurst Common (2 miles east), Brasted (2 miles north) and Sundridge (2 miles north). Within a short drive, we also cover Orpington (10 miles north), Thornton Heath (14 miles north-west), Croydon (12 miles north-west), Bromley (12 miles north), West Norwood (15 miles north-west) and Beckenham (13 miles north-west).
Local landmarks in Toy's Hill
We work in homes and buildings around Stubbs Wood Country Park and The Cock Inn. The closest station to Toy's Hill is Edenbridge station, roughly 3.2 miles south-west. Nearby you will also find Hever Castle (3.9 miles south) and Tandridge Priory (3.5 miles west). For a walk, there’s Dryhill Nature Reserve and Betsom's Hill.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
What we cannot put right
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- Damaged stone surrounds
- Sashes that rattle, stick or will not open
- Timber that has rotted
If you are not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Surfaces we seal
- Period & listed homes
- Brick reveals
- Stone surrounds
- Sash and case windows
- Tenement windows
- Timber door frames
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Avoid heavy scraping on the mastic joint
- Renew mastic before redecorating the windows
- Ask a joiner to look at soft timber first
- Check the mastic when you check the paintwork
Check the mastic when you check the paintwork. Small cracks are easier to deal with early.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
For landlords and businesses
For anyone letting property in or around Toy's Hill, several properties can go on one quote. Just tell us the addresses and what each one needs.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.