West Sussex · England
Ashurst Wood Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Ashurst Wood. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Draughty sash windows at the surround
- Cement or filler used on old window joints that has cracked
- Silicone on a period window that looks wrong
What happens on the day
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes a few hours for a single window, longer for several, including the tidy-up. In a small place like Ashurst Wood, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Mention any parking rules near the property
- Let us know if you’ve seen damp or leaks
- On commercial sites, let us know about site rules
Getting a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, phone 0345 464 0079 or email us.
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About our sand mastic in Ashurst Wood
If your home is listed or in a conservation area, check with your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. Typical jobs include mastic that needs renewing before redecorating and silicone on a period window that looks wrong, on sash and case windows, tenement windows and stone surrounds.
In a village or hamlet like Ashurst Wood, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Ashurst Wood (RH19)
- Region
- West Sussex
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Stone surrounds
Old stone surrounds are often uneven, so the gap is not the same all the way round. We shape it by hand to follow the stone.
When to call us in Ashurst Wood
Timber frames move with the seasons. That movement opens up the mastic joint over time.
If you can see any of these, it’s time to have the joints looked at:
- Gaps round a timber door in stone or brick
- Window mastic to renew ahead of painting
- Old cement repairs round a window that have failed
- Weathered mastic on the most exposed windows
For an older house near a landmark such as St Dunstan, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Before booking anyone
- What guarantee comes with the work
- How the colour is chosen
- What the cure time is
- Who turns up on the day
DIY versus a professional finish
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Why act early in Ashurst Wood
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and finishes neatly against the masonry. Older cottages and farmhouses around Ashurst Wood can have timber 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, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why book with us
- A 12-month guarantee on all work
- Rated 4.9 stars on Google
- Quality sealants from Arbo and Everbuild
- Anti-fungal silicone where joints get wet
See our cost guide or customer reviews.
What affects the cost of sand mastic
We quote each job individually. This is what makes a difference:
- The number of rooms or windows
- Working hours on commercial sites
- The product the joint needs
- Mould in or behind the old joints
The cost depends on the amount of work, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
Helping us quote
When you call or email, it’s useful to know:
- Any previous sealing or DIY work
- A few pictures by email, if you can
- What’s wrong with the joints now
- Roughly how big the job is
Every job is quoted individually, so the first step is telling us about yours. Just call 0345 464 0079 or drop us an email with the details and send pictures if you have them.
Towns and villages near Ashurst Wood
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Questions from Ashurst Wood
Can you help a landlord with a rental near East Grinstead station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Can you do sand mastic in Ashurst Wood?
Yes. We work across London and the South East, and Ashurst Wood is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
What should I tell you?
Let us know what needs doing and where. We will ask anything else we need to know.
Does someone need to be in?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Which products do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Can old silicone round a sash window be swapped for sand mastic?
Usually, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
How long does sand mastic take to harden?
The surface skins quite quickly and it hardens fully over a longer time. Timing depends on the weather and the joint.
Landlords, agents and businesses in Ashurst Wood
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Windows and doors in Ashurst Wood
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Hammerwood Park (about 1.9 miles north-east) nearby, there’s older building stock in the area around Ashurst Wood as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Schools such as Ashurst Wood Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. If you let a flat or house near East Grinstead station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Ashurst Wood is about 2 miles south-east of East Grinstead, in West Sussex. Wherever you are in the RH19 postcode area, we can carry out sand mastic at your property. Ashurst Wood is one of 371 towns and villages in West Sussex we cover for sand mastic. Crawley is on our list too, about 9 miles from Ashurst Wood.
All of RH19 is within our area for sand mastic. If you need sand mastic at a property on Woods Hill Lane, Wray Close and Woods Hill Close or anywhere close by, our applicators can take on the job. We also cover the places around Ashurst Wood: East Grinstead (2 miles north-west), Hammerwood (2 miles north-east), Saint Hill Green (2 miles west), Dormans Park (3 miles north-west) and Dormansland (4 miles north). Larger places within reach include Crawley (9 miles west), Horsham (15 miles west), Haywards Heath (10 miles south-west), Burgess Hill (13 miles south-west), Broadfield (10 miles west) and Bewbush (11 miles west).
Local landmarks in Ashurst Wood
Typical jobs here are in homes near The Maypole Inn, Sackville School and Stoke Brunswick School and the streets around them. The closest station to Ashurst Wood is East Grinstead station, roughly 2.1 miles north-west of the centre. Other landmarks nearby include East Grinstead Museum (1.6 miles north-west) and Bolebroke Castle (3.5 miles east). The countryside around Ashurst Wood includes Hedgecourt Lake.