West Sussex · England
Sand mastic for sash & case windows in Shopwyke, West Sussex
Sand mastic for Shopwyke, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Gaps where the frame meets the masonry
- A silicone bead on a sash window that spoils the look
- Cement or filler used on old window joints that has cracked
Frames and glazing around Shopwyke
Historic houses like Goodwood House (about 2.1 miles north) are a reminder that the area around Shopwyke has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
If you look after a building such as Westbourne House School, its window and door frames need their mastic kept sound, just like a home’s. Rented homes near Chichester station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Shopwyke is about 2 miles east of Chichester, in West Sussex. Wherever you are in the PO20 postcode area, we cover sand mastic for homes and businesses. Our area takes in 371 places across West Sussex, from the larger towns to small villages. We also work in Portsmouth, around 15 miles away.
We work across PO20 for sand mastic and the streets around it. We cover properties on Coach Road and Drayton Lane and the roads around them. We also cover the places around Shopwyke: Maudlin (1 mile north), Westhampnett (1 mile north-west), Oving (1 mile east), Portfield (1 mile west) and Strettington (1 mile north). Further out, we also cover Worthing (15 miles east), Bognor Regis (4 miles south-east), Selsey (8 miles south), Littlehampton (9 miles east), Emsworth (9 miles west) and Rustington (10 miles east).
What’s near Shopwyke
Locally, jobs take us to homes and businesses close to The Coach And Horses Public House, The March CofE Primary School and Chichester High School For Girls, among other places. The nearest railway station is Chichester station, roughly 1.9 miles west of the centre. Nearby you’ll also find Chichester Castle (1.5 miles west) and St Richard's Hospital (1.3 miles west). For a walk, there’s Stoke Down.
How we handle sand mastic in Shopwyke
We work across Shopwyke renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. Common call-outs are for a silicone bead on a sash window that spoils the look and mastic worn away on windows facing the weather, on brick reveals, tenement windows and period & listed homes.
In a village or hamlet like Shopwyke, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
You’re covered for a year from the day we finish. If anything is not right with it, phone 0345 464 0079 or send us an email.
- Where
- Shopwyke (PO20)
- Region
- West Sussex
- Cover
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How the job changes by surface
Timber door frames
Round a period front door, sand mastic gives the right look.
Sash and case windows
A sash window’s box frame sits in the masonry opening. The gap round it is pointed with sand mastic.
Also near Shopwyke
What else we do in Shopwyke
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Common problems we fix in Shopwyke
Rain on the window surround works into any crack and pushes it out. Exposed elevations usually fail first.
Signs it’s time to call us include:
- Mastic dropping out of the joint
- Failed mastic on an exposed elevation
- Tired mastic found when preparing windows for paint
- Modern sealant on a period surround
If you live in an older home near The Parish Church of St Peter, the joint between an old wall and a newer frame is usually the first place rain gets in.
What your quote should include
- How much experience the applicator has
- Is the old sealant removed completely?
- Are they insured?
- How the surfaces are prepared before sealing
The process
Good joint work is mostly preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a single window, longer for several. Somewhere as small as Shopwyke, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- 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.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Tell us about any previous sealing or DIY attempts
- Let us know about parking restrictions
Getting a quote
Every job is quoted individually. Just phone 0345 464 0079 or drop us an email with the details.
Related advice
Your questions about sand mastic in Shopwyke
Do you cover Shopwyke for sand mastic?
Yes, Shopwyke is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing.
Do you work for landlords with property near Chichester station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Are you insured?
Yes. We are fully insured.
Is the work guaranteed?
Our one-year guarantee covers every job.
What sealant 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.
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.
Is it possible to take out silicone and use sand mastic instead?
Generally, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
Will there be a smell?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
What happens if it’s left?
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic is the like-for-like choice and that can be important for listed homes. Around Shopwyke, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
What you get with us
- 20+ years of sealant experience
- Homes, businesses and hotels
- Full insurance on every job
- 180+ five-star Google reviews
See our cost guide or our reviews.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Inspect the joints round the windows every year or so
- Avoid heavy scraping on the mastic joint
- Do not run silicone over sand mastic
- Make sure water runs off the sill
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
Honest limits
To be straight with you, there are a few things sealant will not fix:
- Crumbling stone or brickwork round the window
- Decayed frames that need repair
- Sashes that need overhauling
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before you book.
Where we work in Shopwyke
- Sash and case windows
- Tenement windows
- Period & listed homes
- Timber door frames
- Brick reveals
- Stone surrounds