West Sussex · England
Sand mastic for sash & case windows in Lindfield, West Sussex
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Lindfield. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Draughty sash windows at the surround
- Mastic round period door frames that has failed
- Cement or filler used on old window joints that has cracked
About our sand mastic in Lindfield
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. We work on period & listed homes, timber door frames and brick reveals, and people most often call us about silicone on a period window that looks wrong and old sand mastic that has cracked, crumbled or fallen out.
In a smaller place like Lindfield, some walls face open ground and catch the full force of the weather. That is hard on the mastic around frames and sills.
Each job carries a 12-month guarantee, large or small.
- Where
- Lindfield (RH16)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Questions from Lindfield
Is Lindfield in your area for sand mastic?
Yes. We work across London and the South East, and Lindfield is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
I let a flat near Haywards Heath station. Can you help?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Can sand mastic be painted?
It’s traditionally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Is the work guaranteed?
Every job comes with our one-year guarantee.
Places near Lindfield
What else we do in Lindfield
What happens if it’s left?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry so renewing it early protects the window. In an older home around Lindfield, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Call for a quick quote and we’ll explain what it covers.
What you get with us
- Experience in homes, commercial sites and hotels
- 180+ five-star Google reviews
- 12-month guarantee on every job
- An ARBOMaster approved applicator
See what affects the cost and customer reviews.
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Make sure water runs off the sill
- Inspect the joints round the windows every year or so
- Avoid patching sand mastic with silicone
- Ask the planning authority about consent for listed or conservation-area homes
Don’t run silicone over the new mastic. If you see a crack, ask us to take a look before trying a quick fix.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
Landlords, agents and businesses in Lindfield
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Sand mastic in Lindfield: local notes
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Ockenden Manor (about 2.7 miles west) nearby, there’s older building stock in the area around Lindfield as well as newer homes. 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.
If you look after a building such as Lindfield Primary Academy, the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Haywards Heath station, older sash windows in a rental need their mastic kept sound to keep the weather out. Homes close to All Saints Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Lindfield is about 1 mile north-east of Haywards Heath, in West Sussex. Whether you’re in the middle of Lindfield or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Lindfield is one of 371 towns and villages in West Sussex we cover for sand mastic. Crawley is on our list too, about 8 miles from Lindfield.
Every address in RH16 is covered for sand mastic, from the main roads to the quietest streets. You’ll find streets such as Alma Road, Lewes Road and Dukes Road, and we cover them all. Other places close to Lindfield include Walstead (1 mile south-east), Ardingly (2 miles north), Horsted Keynes (3 miles north-east), Highbrook (3 miles north) and Little London (3 miles north). We also work in nearby towns such as Crawley (8 miles north-west), Horsham (11 miles west), Burgess Hill (4 miles south-west), East Grinstead (8 miles north), Shoreham-by-Sea (15 miles south-west) and Broadfield (8 miles north-west).
Near you in Lindfield
Around Lindfield, our work takes us to homes and buildings near The Witch Inn, Oathall Community College and Tavistock and Summerhill School, among other places. The nearest railway station is Haywards Heath station, roughly 1.1 miles south-west of the centre. Other landmarks nearby include Waterbury Castle (2.7 miles north-east) and Parish Museum (less than half a mile north-east). Open spaces near Lindfield include Blunts Wood and Paiges Meadow.
How the job changes by 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.
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We can do one window or several.
What affects the quote in Lindfield
Call for a quick quote. What matters most is:
- The size of the job
- When we can work, for business premises
- Mould in or behind the old joints
- How easy the joints are to reach
What it costs depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- The problem you’ve noticed
- Whether it has been sealed before
- Roughly how big the job is
- The address or postcode of the job
For sand mastic in Lindfield, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Cracked or broken glass
- Timber that has rotted
- Masonry that needs repairing
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think before you book.
What we seal
- Sash and case windows
- Timber door frames
- Period & listed homes
- Brick reveals
- Tenement windows
- Stone surrounds
The process
When we arrive, we start by going over the job with you, so you know exactly what we’re doing. We protect the surfaces around the joints before any work begins. The work normally takes a few hours for a single window, longer for several. In a smaller place like Lindfield, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
How to prepare
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
- Clear items away from the joints we’re working on
Getting a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or send us an email.