West Sussex · England
Sand mastic for sash & case windows in Upperton, West Sussex
Sand mastic for Upperton and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Draughts and rain around sash boxes
- Old sand mastic that has cracked, crumbled or fallen out
- Silicone on a period window that looks wrong
About our sand mastic in Upperton
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. If you’re dealing with mastic worn away on windows facing the weather and cement or filler used on old window joints that has cracked, we can help, whatever the surface.
Homes in small places like Upperton often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- Upperton (GU28)
- Region
- West Sussex
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How the job changes by surface
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
Also near Upperton
Also in Upperton
When something else is needed
It helps to know what we cannot do too:
- Whether work needs listed building consent
- Sash cords, weights and draught-proofing of the sashes
- Decayed frames that need repair
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly.
What we seal
- Tenement windows
- Sash and case windows
- Stone surrounds
- Brick reveals
- Period & listed homes
- Timber door frames
What affects the quote in Upperton
Some jobs are bigger than they look, and some smaller. The main factors:
- How easy the joints are to reach
- Mould in or behind the old joints
- Which sealant suits the joint
- The number and length of the joints
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- The address or postcode of the job
- The type of property
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or send us an email.
What we do, step by step
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the job takes a few hours for a single window, longer for several for a typical job. In a small place like Upperton, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- Mention any sign-in or site rules at work premises
- Mention if the joints have been sealed before
- Let us know about stairs, lifts or work at height
Get a quote
We quote each job on its own, so the first step is telling us about yours. Just ring 0345 464 0079 or drop us an email with the details.
Advice
Your questions about sand mastic in Upperton
Is sand mastic in Upperton guaranteed?
All our work, in Upperton and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Is Upperton within the area you cover?
Yes. Upperton is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Can tenants book the work?
Of course. Ask your landlord first, and we can send them the quote if that helps.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we’re using and why.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Are you insured?
Yes. We’re fully insured.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Take care around the mastic when scraping paint
- Renew mastic before redecorating the windows
- Ask us before painting near the mastic
- Keep sills and gutters clear so water drains away
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, 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.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
What sand mastic looks like in Upperton
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Petworth House (about 1.2 miles south-east) nearby, there’s older building stock in the area around Upperton 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’s traditional sand mastic.
In and around Upperton, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint. If you live in an older home near The Parish Church of All Hallows, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Upperton is about 12 miles north-east of Chichester, in West Sussex. Homes, rented property, offices and hotels in Upperton can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Upperton is one of 371 towns and villages in West Sussex where we work. Our Crawley page covers work nearby, about 21 miles away.
We cover every part of GU28 for sand mastic. Other places close to Upperton include Tillington (1 mile south-east), Hampers Green (1 mile east), River (1 mile west), Petworth (1 mile south-east) and Rotherbridge (2 miles south). We also work in nearby towns such as Horsham (14 miles east), Bognor Regis (14 miles south), Chichester (12 miles south-west), Littlehampton (14 miles south), Rustington (14 miles south-east) and Storrington (10 miles south-east).
Local landmarks in Upperton
Well-known places in the area include Midhurst Community Hospital (4.3 miles west) and Coultershaw Heritage Site (2.2 miles south). The countryside around Upperton includes Graffham Common and Blackdown.
Why deal with it now?
If you are redecorating, renew the mastic first. Paint over cracked mastic won’t stop the gaps and traditional guidance is to leave the new mastic unpainted. Around Upperton, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, ring 0345 464 0079 or email us for an honest opinion and a quote.
Why Upperton clients choose us
- Tidy, careful work
- Arbo and Everbuild products
- Full insurance on every job
- A 12-month guarantee on all work
See our cost guide or what customers say.