West Sussex · England
Cross Gate Sand Mastic
Sand mastic across Cross Gate and nearby, with every bit of old sealant taken out first and a one-year guarantee.
- Draughts and rain around sash boxes
- Open joints round the window box
- Window mastic to renew ahead of painting
Sand mastic for homes and businesses in Cross Gate
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 tenement windows, timber door frames and period & listed homes, and people most often call us about mastic dropping out of the joint and weathered mastic on the most exposed windows.
Homes in small places like Cross Gate often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Whatever the size of the job, it’s backed by our one-year guarantee in Cross Gate and across West Sussex.
- Where
- Cross Gate (BN18)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Sand mastic in Cross Gate: local notes
With historic houses such as Parham House (about 1.1 miles east) nearby, there’s older building stock in the area around Cross Gate as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Amberley station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. For an older house near a landmark such as The Parish Church of St Michael and All Angels, the joint between an old wall and a newer frame is generally the first place rain gets in.
Cross Gate is about 7 miles north of Littlehampton, in West Sussex. Our applicators cover sand mastic for homeowners, landlords and businesses in Cross Gate, as part of our work across West Sussex. Across West Sussex, we cover 371 places, Cross Gate among them. For nearby work, see our Brighton page, about 18 miles away.
Every address in BN18 is covered for sand mastic. Other places close to Cross Gate include Rackham (1 mile east), Amberley (1 mile south-west), Bury (2 miles west), Coldwaltham (2 miles north-west) and Watersfield (2 miles north-west). Within a short drive, we also cover Horsham (14 miles north-east), Worthing (8 miles south-east), Bognor Regis (11 miles south-west), Chichester (12 miles south-west), Littlehampton (7 miles south) and Shoreham-by-Sea (12 miles south-east).
Around Cross Gate
We work in homes and buildings around Parham Park. For rail, the closest station is Amberley station, roughly 1.5 miles south-west of the centre. Other landmarks nearby include Amberley Museum (1.4 miles south-west) and Amberley Castle (1 mile west). Not far away are Bignor Hill and Amberley Wild Brooks.
How we quote for sand mastic
We quote each job individually. These are the things that affect it:
- The number and length of the joints
- The type of sealant required
- How easy the joints are to reach
- Whether old sealant or filler has to be cut out
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- Photos by email, if that is easy
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
- Any previous sealing or DIY work
If you are in Cross Gate and need sand mastic, ring 0345 464 0079 or email us. Tell us what the problem is and where, and we will agree the price before any work begins.
Honest limits
A few problems are outside what sealant work can do:
- Sashes that need overhauling
- Broken panes
- Masonry that needs repairing
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Where we work in Cross Gate
- Period & listed homes
- Brick reveals
- Tenement windows
- Sash and case windows
- Stone surrounds
- Timber door frames
Leave it or put it right?
If you are redecorating, renew the mastic first. Painting over failed mastic does not seal it, and the new mastic is traditionally left unpainted. Older cottages and farmhouses around Cross Gate can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why book with us
- One-year guarantee on every job
- ARBOMaster approved applicator
- 180+ five-star Google reviews
- Quality sealants from Arbo and Everbuild
Take a look at our cost guide or our reviews.
Common questions in Cross Gate
Do you work for landlords with property near Amberley station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Will you come out to Cross Gate?
Yes, Cross Gate is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Where is Mr Mastic based?
We work from Crawley. We cover Cross Gate and the rest of West Sussex.
How long will you be here?
Typically it takes a few hours per window, depending on the condition of the joints. Larger jobs naturally take longer, and we’ll say how long yours will take.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
How long does sand mastic take to harden?
It takes a while. The skin forms first, and the full set comes later and we will give you an idea for your job.
Do you guarantee sand mastic work?
All our work has a one-year guarantee, and we are fully insured.
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.
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Find out about consent before window work on a listed home
- Leave the new mastic unpainted
- Sort the mastic before the decorators arrive
- Avoid patching sand mastic with silicone
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Signs you need sand mastic in Cross Gate
Age is the main cause. Even well-laid mastic needs renewing in time, depending on exposure and upkeep.
Signs it’s time to call us include:
- Gaps where the frame meets the masonry
- Mastic worn away on windows facing the weather
- Old cement repairs round a window that have failed
- Window mastic to renew ahead of painting
Schools such as Amberley CofE Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- What the quote includes, VAT included or not
- Which colour the sealant will be
- What happens if they find a problem under the old sealant
- The length of the guarantee
How the visit works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes anything from a few hours to a full day, depending on how many windows. In a small place like Cross Gate, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
- Move anything stored near the joints
Ask for a quote
Every job is quoted individually, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details.
Advice
Towns and villages near Cross Gate
More services for Cross Gate
Work for landlords, hotels and businesses
We also work for property managers and facilities teams. We can quote a run of properties together.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.