West Sussex · England
Sand mastic for sash & case windows in Sidlesham, West Sussex
Sand mastic across Sidlesham and nearby, with every bit of old sealant taken out first.
- Draughty sash windows at the surround
- Gaps where the frame meets the masonry
- Patchy fillers round a sash window
Frames and glazing around Sidlesham
Sidlesham is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. 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.
Managing a site like Sidlesham Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Chichester station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Sidlesham is about 3 miles north of Selsey, in West Sussex. If you need sand mastic in Sidlesham, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We’re based in Crawley and cover West Sussex. Sidlesham is one of 371 towns and villages in West Sussex where we work for sand mastic. We also work in Portsmouth, about 13 miles from Sidlesham.
Here we cover the PO20 postcode area for sand mastic. That includes homes and businesses on Rookery Lane, Selsey Road and Manhood Lane and the roads around them. Sidlesham is on the B2145, so it’s easy for us to get to with everything needed for sand mastic. We also cover Keynor Estate (1 mile south-west), Street End (1 mile north), Sidlesham Common (1 mile north), Fisher (2 miles north-east) and Church Norton (2 miles south). Larger places within reach include Bognor Regis (4 miles east), Chichester (4 miles north), Selsey (3 miles south), Littlehampton (11 miles east), Emsworth (8 miles north-west) and Rustington (12 miles east).
Local landmarks in Sidlesham
For rail, the closest station is Chichester station, roughly 3.9 miles north. Other landmarks nearby include St Richard's Hospital (4.7 miles north) and Chichester Castle (4.4 miles north).
How we handle sand mastic in Sidlesham
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. We rake it out and renew it and tidies the surround. We are often asked to deal with failed mastic on an exposed elevation and crumbling sand mastic round a window, on sash and case windows, timber door frames and period & listed homes.
Mastic can only go onto a dry, clean joint, so window work in Sidlesham is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or drop us an email.
- Where
- Sidlesham (PO20)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Also near Sidlesham
What else we do in Sidlesham
How the visit works
At the end, we look at the finished work together and tell you how long to leave it. The visit itself normally takes a few hours for a single window, longer for several, depending on the amount of work. Somewhere like Sidlesham needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
- Keep pets and children clear of the area while we work
Getting a quote
We quote each job on its own. Just phone 0345 464 0079 or drop us an email with the details.
Advice
Why act early in Sidlesham
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic suits the building and blends with the stone or brick. In a small place like Sidlesham, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Why us?
- 20+ years of sealant experience
- Every job guaranteed for a year
- Fully insured
- Quality sealants from Arbo and Everbuild
Take a look at how sealant jobs are priced and customer reviews.
Your questions about sand mastic in Sidlesham
Do you cover smaller places like Sidlesham?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Does living near the coast affect sand mastic in Sidlesham?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Can you quote for more than one area?
Yes. Several rooms, windows or areas can go on one quote.
Is there any odour?
Sometimes, a little. It fades as the sealant cures.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Can tenants book the work?
Yes, but check with your landlord or agent first. Landlords are often happy for the work to be arranged.
Can you seal over the old sealant?
No, it will not last. It can look neat for a few weeks, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Landlords, agents and businesses in Sidlesham
We work for landlords and letting agents as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
Quotes for sand mastic in Sidlesham
There’s no set price list, because no two jobs are the same. What we look at:
- The amount of work
- Working hours on commercial sites
- The type of sealant required
- Whether old sealant or filler has to be cut out
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will explain what it covers.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- The rough size of the job
- Any previous sealing or DIY work
- What’s wrong with the joints now
- Whether it’s a home or a business
Getting a quote is simple: let us know what needs doing and where and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
When to call us in Sidlesham
Rain on the window surround works into any crack and loosens it further. Exposed elevations normally fail first.
It’s worth asking for a quote if you see:
- Failed mastic on an exposed elevation
- Old cement repairs round a window that have failed
- Gaps where the frame meets the masonry
- Tired mastic found when preparing windows for paint
Homes close to St Mary Our Lady Sidlesham include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
Before booking anyone
- What insurance they hold
- Whether all the old sealant comes out first
- What the quote includes, VAT included or not
- Who turns up on the day
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Keep modern sealant off the mastic
- Clear gutters so water does not pour onto the windows
- Take care around the mastic when scraping paint
- Do not paint over the new mastic
Do not run silicone over the new mastic. If anything cracks, get it looked at before trying a quick fix.
Sound mastic protects the frame. Once it fails, water can sit against the timber, which can lead to rot.