West Sussex · England
Steyning Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Steyning. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Draughty sash windows at the surround
- Cement or filler used on old window joints that has cracked
- Cracked mastic round a front door frame
Sand mastic in Steyning
Traditional burnt sand mastic blends with stone and brick surrounds. It’s a good fit for period properties where a modern sealant bead would stand out. We work on stone surrounds, period & listed homes and timber door frames, and common reasons people get in touch are gaps where the frame meets the masonry and cracked mastic round a front door frame.
In smaller places like Steyning, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
We stand behind the work with a one-year guarantee.
- Location
- Steyning (BN44)
- Region
- West Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Quotes for sand mastic in Steyning
The quote reflects the job in front of us. We take into account:
- When we can work, for business premises
- The old material and how stubborn it is
- Which sealant suits the joint
- Any mould that needs treating
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What to tell us for a quote
When you contact us, these details help:
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
- A few photos by email, if you can
- Roughly how big the job is
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that’s easy.
Sand mastic in Steyning: local notes
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as Steyning CofE Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Steyning is about 4 miles north-west of Shoreham-by-Sea, in West Sussex. Jobs in Steyning get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Steyning is one of 371 places in West Sussex we cover for sand mastic. For nearby work, see our Brighton page.
All of BN44 is within our area for sand mastic, from the main roads to the quietest streets. If you need sand mastic at a property on High Street, Market Field and Dog Lane or a nearby road, we can help. Close by, we work in Bramber (1 mile east), Botolphs (1 mile south-east), Upper Beeding (1 mile east), Sompting (4 miles south) and Findon Valley (4 miles south-west). Larger places within reach include Horsham (12 miles north), Worthing (5 miles south-west), Haywards Heath (13 miles north-east), Burgess Hill (10 miles north-east), Littlehampton (10 miles south-west) and Shoreham-by-Sea (4 miles south-east).
Near you in Steyning
Around Steyning, our work takes us to homes and buildings near The Model Bakery The Norfolk Arms and Steyning Grammar School and the streets around them. Steyning’s nearest station is Lancing station, roughly 4.1 miles south of the centre. A little further out are Steyning Museum (within half a mile north) and Southlands Hospital (4.4 miles south-east). Green spaces nearby include Woods Mill and Chanctonbury Hill.
Steyning: your questions answered
Do you cover smaller places like Steyning?
Yes. Steyning is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Steyning for sand mastic?
Yes. We work across London and the South East, and Steyning is part of that. Just call 0345 464 0079 or email us with a few details of the job.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
What guarantee comes with the work?
You get our one-year guarantee to all our work.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
I rent my home. Can I book you?
Yes. Check with your landlord; we can send the quote to them too.
Is sand mastic better than silicone for my windows?
Sand mastic normally suits period timber windows best. On modern frames, we’d normally use a flexible sealant, and we’ll explain why.
What exactly is sand mastic?
Sand plus a binder based on linseed oil. It’s applied by hand and finished to sit neatly against the masonry.
Towns and villages near Steyning
What else we do in Steyning
What we’re called out for in Steyning
Shallow joints are a common cause. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
Look out for any of the following:
- Mastic that needs renewing before redecorating
- Crumbling sand mastic round a window
- Gaps round a timber door in stone or brick
- Mastic worn away on windows facing the weather
For landlords with property near Lancing station, any sash windows need sound mastic to keep draughts and rain out.
Questions to ask before booking
- Who does the work, and how experienced they are
- What happens if they find a problem under the old sealant
- How long the guarantee is
- What product goes in the joint
What happens if it’s left?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. Around Steyning, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
What you get with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Any old sealant cut out fully, not covered over
- 20+ years of sealant experience
- Neat joints and a tidy finish
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Have rotten timber repaired before new mastic goes in
- Clear gutters so water doesn’t pour onto the windows
- Don’t run silicone over sand mastic
- Sort the mastic before the decorators arrive
Don’t run silicone over the new mastic. If you see a crack, ask us to take a look rather than patching it.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
What sealant work can’t fix
Before booking, it’s worth knowing the limits too:
- Decisions on consent for listed homes
- Broken panes
- Masonry that needs repairing
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before you book.
Where we work in Steyning
- Stone surrounds
- Timber door frames
- Brick reveals
- Period & listed homes
- Sash and case windows
- Tenement windows
The process
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes anything from a few hours to a full day, depending on how many windows. Parking around Steyning is generally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Keep children and pets away from the work area
- Tell us about any water getting in
- Mention any parking rules near the property
How to get a quote
Want a quote for sand mastic? Please phone 0345 464 0079 or email us with a few details. We will explain what we’d do and send you a clear quote before any work starts.
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Landlords, agents and businesses in Steyning
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.