West Sussex · England
Sand mastic for sash & case windows in Wiston, West Sussex
Sand mastic for Wiston, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Wind and rain getting in round a sash window
- Modern sealant on a period surround
- Gaps round a timber door in stone or brick
Sand mastic for homes and businesses in Wiston
Silicone on a period window often looks wrong and is not always the right material. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. Typical jobs include draughts and rain around sash boxes and gaps between timber frames and stone or brick, across timber door frames, sash and case windows and period & listed homes.
In a village or hamlet like Wiston, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
All our work is covered by our 12-month guarantee, wherever you are in West Sussex.
- Where
- Wiston (BN44)
- Region
- West Sussex
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
To keep the joints looking good and working properly:
- Go gently near the mastic when preparing windows
- Keep sills and gutters clear so water drains away
- Find out about consent before window work on a listed home
- Keep modern sealant off the mastic
Do not touch or press the mastic while it hardens. It forms a skin fairly soon but needs longer to fully harden.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.
What we cannot put right
We will not take on work that won’t last, so these are the limits:
- Broken panes
- Crumbling stone or brickwork round the window
- Whether work needs listed building consent
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Sash and case windows
- Timber door frames
- Stone surrounds
- Brick reveals
- Tenement windows
- Period & listed homes
What sand mastic looks like in Wiston
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near All Saints Church, the joint between an old wall and a newer frame is usually the first place rain gets in. In and around Wiston, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Wiston is about 6 miles north of Worthing, in West Sussex. We provide sand mastic to homeowners, landlords and businesses in Wiston and nearby, as part of our work across West Sussex. We cover 371 towns and villages across West Sussex, from the larger towns to small villages. You can also see our page for Brighton, roughly 12 miles from Wiston.
Here we cover the BN44 postcode area for sand mastic. Sand mastic is available to properties on Hole Street, Water Lane and Spithandle Lane. Neighbouring places we cover for sand mastic include Ashington (1 mile north-west), Ashurst (2 miles north-east), Dial Post (3 miles north), Partridge Green (4 miles north-east) and Broomer's Corner (4 miles north). Within a short drive, we also cover Horsham (11 miles north), Worthing (6 miles south), Haywards Heath (13 miles north-east), Burgess Hill (11 miles east), Littlehampton (10 miles south-west) and Shoreham-by-Sea (7 miles south-east).
Landmarks near Wiston
Nearby you’ll also find Steyning Museum (2.8 miles south-east). The countryside around Wiston includes Chanctonbury Hill and Knepp Wildland.
Also in Wiston
What we do, step by step
All our tools and materials come with us in the van. Once we have agreed what’s being done, the area is protected and the work begins. It normally takes anything from a few hours to a full day, depending on how many windows. Somewhere as small as Wiston, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- 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.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Tell us about any water getting in
- Clear the area around the work
- Let us know about stairs, lifts or work at height
How to get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work.
Related advice
For landlords and businesses
In hotels, rooms out of use cost money, 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.
We work for letting agents and landlords as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
What happens if it’s left?
If you’re redecorating, renew the mastic first. Paint over cracked mastic won’t stop the gaps and traditional guidance is to leave the new mastic unpainted. In a small place like Wiston, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, ring 0345 464 0079 or email us for an honest opinion and a quote.
What you get with us
- We never seal over old sealant
- Every job guaranteed for a year
- We are fully insured
- Arbo and Everbuild products
How we quote for sand mastic
For a quick quote, just ask. What matters most is:
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- Access and height
- The product the joint needs
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
If you’re in Wiston and need sand mastic, call 0345 464 0079 or email us. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
Common questions in Wiston
Is sand mastic in Wiston guaranteed?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Is Wiston within the area you cover?
Yes, Wiston is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
What does sand mastic cost?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before we start.
I’m a tenant. Can you help?
Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.
Is consent needed for window work on a listed home?
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.
Can new sealant go over the old?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Can I paint the new mastic?
Traditional guidance is not to paint over sand mastic. If you are redecorating the window, ask us first and we will talk you through it.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.