West Sussex · England
Heyshott Green Sand Mastic
Sand mastic for Heyshott Green and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Window mastic to renew ahead of painting
- Draughty sash windows at the surround
- Gaps round a timber door in stone or brick
Heyshott Green: your questions answered
Is there a guarantee on sand mastic in Heyshott Green?
All our work, in Heyshott Green and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Do you cover Heyshott Green for sand mastic?
Yes. We work across London and the South East, and Heyshott Green is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
I rent my home. Can I book you?
Yes. Check with your landlord; we can send the quote to them too.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
How long does sand mastic take to harden?
A skin forms quite soon, but full hardening takes longer. We’ll explain what to expect before we leave.
Is it messy?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Heyshott Green, along with the rest of our area.
About our sand mastic in Heyshott Green
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. We’re often asked to deal with cracked mastic round a front door frame and draughty sash windows at the surround, on period & listed homes, sash and case windows and tenement windows.
Mastic can only go onto a dry, clean joint, so window work in Heyshott Green is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
You are covered for a year from the day we finish. If anything isn’t right with it, call 0345 464 0079 or email us.
- Place
- Heyshott Green (GU29)
- Wider area
- West Sussex
- Cover
- One year on every job
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Heyshott Green homes and the weather
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. Historic houses like Cowdray House (about 1.9 miles north) are a reminder that the area around Heyshott Green has older buildings as well as new. 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 live in an older home near The Parish Church of St James, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Heyshott Green is about 9 miles north of Chichester, in West Sussex. Our applicators cover sand mastic for homes and businesses in Heyshott Green. Heyshott Green is one of 371 places in West Sussex where we work for sand mastic. We also work in Portsmouth, around 19 miles away.
Every address in GU29 is covered for sand mastic. Neighbouring places we cover for sand mastic include Heyshott (1 mile south-east), Hoyle (1 mile east), Cocking Causeway (1 mile north-west), Cocking (1 mile south-west) and West Lavington (1 mile north). Within a short drive, we also cover Bognor Regis (12 miles south), Chichester (9 miles south), Littlehampton (13 miles south-east), Emsworth (12 miles south-west), Rustington (14 miles south-east) and Storrington (12 miles east).
What’s near Heyshott Green
Typical jobs here are in homes near Unicorn Inn and the streets around them. Other landmarks nearby include Midhurst Community Hospital (2.3 miles north) and Midhurst Museum (1.9 miles north). For a walk, there’s Graffham Common and Levin Down.
The process
Most of a good job is in the preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a single window, longer for several. For a village or hamlet like Heyshott Green, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First we agree which joints need doing.
- 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
- Let us know about stairs, lifts or work at height
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
How to get a quote
Need a quote? Please call 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Signs you need sand mastic in Heyshott Green
Over the years, sand mastic weathers. It hardens, cracks and starts to come away from the frame or the masonry.
Any of these means the joints need attention:
- Failed mastic on an exposed elevation
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps between timber frames and stone or brick
- Wind and rain getting in round a sash window
If you look after a building such as Midhurst Rother College, its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- What happens if the job turns out different
- How the surfaces are prepared before sealing
- What product goes in the joint
- Which colour the sealant will be
Places near Heyshott Green
Also in Heyshott Green
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
When it isn’t the sealant
It helps to know what we can’t do:
- Planning or listed building consent (your local planning authority decides)
- Crumbling stone or brickwork round the window
- Sashes that need overhauling
If in doubt, call 0345 464 0079 or send us an email and we will say what we think before booking.
Where we work in Heyshott Green
- Period & listed homes
- Brick reveals
- Timber door frames
- Sash and case windows
- Tenement windows
- Stone surrounds
Landlord and commercial work in Heyshott Green
For anyone letting property in or around Heyshott Green, several properties can go on one quote. Send us the addresses and the work at each.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Surface by surface
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.
Why deal with it now?
An open joint round the frame lets weather in. Left, water can reach the timber and the wall, so dealing with it now protects both. Around Heyshott Green, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Combining jobs into one visit is normally more efficient than separate visits. You’ll get one clear quote for the whole job.
What you get with us
- Domestic, commercial and hotel work
- Anti-fungal silicone where joints get wet
- Fully insured
- We leave the area clean and tidy
Read our cost guide or customer reviews.