West Sussex · England
Sand Mastic in Henfield
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Henfield, backed by a one-year guarantee. Ask us for a quote.
- Cement or filler used on old window joints that has cracked
- Mastic round period door frames that has failed
- Old sand mastic that has cracked, crumbled or fallen out
Frames and glazing around Henfield
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.
If you live in an older home near St Peter's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you look after a building such as St Peter's CofE Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Henfield is about 7 miles north of Shoreham-by-Sea, in West Sussex. We carry out sand mastic for homes and businesses in Henfield and the surrounding area. Across West Sussex, we cover 371 places, Henfield among them. You can also see our page for Brighton, about 9 miles away.
Jobs for sand mastic in BN5 is quoted and booked the same way as anywhere else. Local streets include Upper Station Road, High Street and Lower Station Road, and we cover them all. We also cover Woodmancote (2 miles south-east), Blackstone (2 miles east), Small Dole (2 miles south), Shermanbury (2 miles north) and High Cross (3 miles east). Within a short drive, we also cover Crawley (13 miles north), Horsham (9 miles north), Worthing (9 miles south-west), Haywards Heath (9 miles north-east), Burgess Hill (7 miles east) and Littlehampton (14 miles south-west).
Landmarks near Henfield
Around Henfield, our work takes us to homes and buildings near The Bell Inn. Well-known places in the area include The Dene Hospital (5.4 miles north-east) and Steyning Museum (3.7 miles south-west). Not far away are Woods Mill and Truleigh Hill.
Sand mastic in Henfield, done properly
Sand mastic does not last for ever and gaps open up round the frame. Renewing it closes the gap and tidies the surround. If you are dealing with silicone on a period window that looks wrong and mastic worn away on windows facing the weather, we can help, whatever the surface.
Many houses in smaller places like Henfield have conservatories, garden rooms or patio doors. Their glazing joints and frame seals are as much a part of the job as the windows, and any older timber or sash windows need a sealant that suits them.
There’s a 12-month guarantee on every job.
- Where
- Henfield (BN5)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Nearby places to Henfield
Other services in Henfield
What we do, step by step
When we arrive, we start by going over the job with you, so you know exactly what we’re doing. Surfaces next to the work are protected before any work starts. Most jobs take anything from a few hours to a full day, depending on how many windows. A visit to Henfield is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- Mention any leaks or damp you’ve noticed
- Mention any tricky access
- For indoor joints, keep the area dry beforehand if you can
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, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or email us.
Related advice
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Keeping the joints in good condition
So the new joints stay in good condition:
- Leave the new mastic unpainted
- Ask a joiner to look at soft timber first
- Renew mastic before redecorating the windows
- Go gently near the mastic when preparing windows
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall, so renewing it early is worth it.
Different surfaces, different methods
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. It’s renewed by hand.
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We work on single windows or whole elevations.
What affects the cost of sand mastic
For a quick quote, just ask. The main things that affect it are:
- Any working-time requirements on site
- Mould in or behind the old joints
- The product the joint needs
- The size of the job
What it costs depends on the amount of work, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What we need to know
Photos by email are helpful but not essential. Please mention:
- The problem you’ve noticed
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
Want a quote for sand mastic? Please call 0345 464 0079 or email us with a few details. We will explain what we’d do and give you a clear price before any work starts.
Landlords, agents and businesses in Henfield
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
What we cannot put right
We will not take on work that will not last, so here’s what sealant cannot put right:
- Planning or listed building consent (your local planning authority decides)
- Sashes that need overhauling
- Cracked or broken glass
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think.
Where we work in Henfield
- Period & listed homes
- Sash and case windows
- Stone surrounds
- Tenement windows
- Brick reveals
- Timber door frames
Henfield questions
Is there a guarantee on sand mastic in Henfield?
All our work, in Henfield and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Can you do sand mastic in Henfield?
Yes, Henfield is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Can you quote for more than one area?
Yes. More than one area can be quoted together.
Will there be a smell?
Sometimes, a little. It fades as the sealant cures.
Do you work for landlords and businesses?
Yes. We work for householders, landlords, letting agents, businesses and hotels in Henfield.
Can tenants book the work?
Yes. Ask your landlord first, and we can send them the quote if that helps.
Can old silicone round a sash window be swapped for sand mastic?
In most cases. The silicone is cut out and the joint cleaned before the sand mastic goes in.
How do I get a quote for sand mastic in Henfield?
Size, access and the old material all affect the cost. Ask us for a quote.