West Sussex · England
Sand mastic for sash & case windows in Dragons Green, West Sussex
Sand mastic across Dragons Green and nearby, with old sealant always removed completely and a 12-month guarantee.
- Cement or filler used on old window joints that has cracked
- Draughty sash windows at the surround
- Silicone on a period window that looks wrong
Sand mastic for homes and businesses in Dragons Green
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 timber door frames, stone surrounds and period & listed homes, and people most often call us about draughts and rain around sash boxes and cement or filler used on old window joints that has cracked.
Homes in small places like Dragons Green often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or send us an email.
- Location
- Dragons Green (RH13)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When it is not the sealant
To be straight with you, there are a few things sealant will not fix:
- Sash cords, weights and draught-proofing of the sashes
- Decisions on consent for listed homes
- Damaged stone surrounds
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Joints and surfaces we work on
- Sash and case windows
- Timber door frames
- Stone surrounds
- Brick reveals
- Tenement windows
- Period & listed homes
Leave it or put it right?
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic suits the building and finishes neatly against the masonry. Where a wall is exposed, as many are in small places like Dragons Green, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Why us?
- 4.9 on Google from 180+ five-star reviews
- Full insurance on every job
- Homes, businesses and hotels
- We leave the area clean and tidy
Take a look at our cost guide and customer reviews.
For landlords and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
We work for landlords and agents as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
Different surfaces, different methods
Tenement and terrace windows
Windows above ground floor need the right access. Tell us the height and we will confirm what’s needed.
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.
Dragons Green: your questions answered
Do you cover Dragons Green for sand mastic?
Yes, Dragons Green is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Do you cover smaller places like Dragons Green?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Should I check with the council before work on a listed or conservation-area home?
Checking first is sensible. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
Can you replace silicone on a period window with sand mastic?
Generally, yes. With the silicone removed and the joint cleaned, sand mastic is applied by hand.
Can I add another job to the visit?
Of course. Doing several areas at once is generally more efficient.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Can sand mastic be painted?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
What exactly is sand mastic?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Dragons Green homes and the weather
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to The Church of St Mary the Virgin include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in. Rented homes near Billingshurst station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Dragons Green is about 5 miles south-west of Horsham, in West Sussex. Dragons Green gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Across West Sussex, we cover 371 places, and Dragons Green is one of them. There’s also a page for Crawley, roughly 11 miles from Dragons Green.
Our applicators cover all of the RH13 postcode area for sand mastic. We cover properties on Dragons Lane and Dragons Green Road. Other places close to Dragons Green include Shipley (1 mile south), Whitehall (1 mile south), Broomer's Corner (2 miles south-west), Dial Post (3 miles south) and West Grinstead (3 miles south-east). Further out, we also cover Crawley (11 miles north-east), Horsham (5 miles north-east), Worthing (12 miles south), Haywards Heath (12 miles east), Burgess Hill (11 miles east) and Littlehampton (15 miles south-west).
Landmarks near Dragons Green
Dragons Green’s nearest station is Billingshurst station, roughly 3.4 miles west. Well-known places in the area include Horsham Hospital (5.4 miles north-east) and Christs Hospital School Museum (3.2 miles north). Green spaces nearby include Knepp Wildland.
When to call us in Dragons Green
Rain on the window surround works into any crack and loosens it further. Windows facing the weather tend to go first.
Any of these means the joints need attention:
- Open joints round the window box
- Cracked mastic round a front door frame
- Old cement repairs round a window that have failed
- Mastic worn away on windows facing the weather
For site and facilities teams at buildings such as Shipley CofE Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- Whether you can choose the colour
- Is the old sealant removed completely?
- Who turns up on the day
- What happens if the job turns out different
Aftercare tips
A little care helps the new joints last. Our advice:
- Ask us before painting near the mastic
- Keep sills and gutters clear so water drains away
- Do not run silicone over sand mastic
- Plan mastic work ahead of painting
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look rather than patching it.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
How the visit works
The work is kept neat and contained to the joints we are treating. The job normally takes a few hours for a single window, longer for several, and we explain the cure time before we leave. Somewhere like Dragons Green needs a little journey planning: 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.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
How to prepare
- Mention any tricky access
- Clear the area around the work
- Keep children and pets away from the work area
Getting a quote
For sand mastic in Dragons Green, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before work begins.