West Sussex · England
Sand Mastic in Walberton
Specialist sand mastic for Walberton: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Patchy fillers round a sash window
- Weathered mastic on the most exposed windows
- Open joints round the window box
About our sand mastic in Walberton
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. Typical jobs include old sand mastic that has cracked, crumbled or fallen out and tired mastic found when preparing windows for paint, on stone surrounds, timber door frames and sash and case windows.
Mastic can only go onto a dry, clean joint, so window work in Walberton is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Walberton (BN18)
- Region
- West Sussex
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
For landlords and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
For anyone letting property in or around Walberton, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
Nearby places to Walberton
More services for Walberton
Windows and doors in Walberton
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.
Managing a site like Walberton and Binsted CofE Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Barnham station, any sash windows need sound mastic to keep draughts and rain out. In the older streets around St Mary's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Walberton is about 5 miles north-west of Littlehampton, in West Sussex. Walberton gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. 371 places in West Sussex are on our list, large and small. We also work in Portsmouth, around 20 miles away.
We cover every part of BN18 for sand mastic. Local streets include The Street, Maple Road and Prime Close, and we cover them all. We also cover the places around Walberton: Avisford (1 mile north-east), Binsted (1 mile east), Slindon Common (1 mile north), West Barnham (1 mile south-west) and Barnham (1 mile south-west). Further out, we also cover Worthing (10 miles east), Bognor Regis (5 miles south-west), Chichester (7 miles west), Selsey (11 miles south-west), Littlehampton (5 miles south-east) and Shoreham-by-Sea (15 miles east).
Around Walberton
In Walberton, that means homes and buildings near St Philip Howard Catholic High School. The closest station to Walberton is Barnham station, roughly 1.3 miles south-west of the centre. Well-known places in the area include Arundel and District Hospital (2.5 miles east) and Arundel Castle (3 miles east). Open spaces near Walberton include WWT Arundel and Bignor Hill.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Make sure water runs off the sill
- Have rotten timber repaired before new mastic goes in
- Check the mastic when you check the paintwork
- Take care around the mastic when scraping paint
Leave the new mastic alone while it firms up. It forms a skin fairly soon, but takes longer to harden fully.
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 happens if it’s left?
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and finishes neatly against the masonry. Older cottages and farmhouses around Walberton can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why choose Mr Mastic in Walberton
- An ARBOMaster approved applicator
- Sanitary silicone with an anti-fungal additive in wet areas
- One-year guarantee on every job
- Tidy, careful work
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the 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.
What happens on the day
There’s no need to move everything out, only the area right around the joints. We protect the rest, and the job takes a few hours for a single window, longer for several for a typical job. Somewhere like Walberton 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.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
How to prepare
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
How to get a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Related advice
What we can’t put right
Some problems need a builder, plumber or other trade rather than us:
- Damaged stone surrounds
- Sashes that need overhauling
- Decisions on consent for listed homes
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Tenement windows
- Timber door frames
- Sash and case windows
- Brick reveals
- Period & listed homes
- Stone surrounds
What affects the cost of sand mastic
Every job gets its own quote. These are the things that affect it:
- How easy the joints are to reach
- How many rooms, windows or areas are involved
- Whether old sealant or filler has to be cut out
- The type of sealant required
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we will go through it with you.
Asking for a quote
Before you ask for a quote, have a think about:
- Where the job is, and your postcode
- What’s wrong with the joints now
- How we’d reach the joints
- Whether it’s a home or a business
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
Walberton questions
Will you come out to Walberton?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Barnham station?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we will talk you through it.
What does sand mastic cost?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or send us an email and tell us what needs doing and where.
Can you match the sealant colour?
We help you choose a colour that suits. The choice depends on the product the joint needs.
Is it OK to seal over old sealant?
No. The old sealant always comes out first.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before resealing.
How long does sand mastic take to harden?
The surface skins quite quickly, then hardens over a longer period. Timing depends on the weather and the joint.