Hampshire · England
Sand Mastic in Upham
Our applicators work in Upham on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- A silicone bead on a sash window that spoils the look
- Gaps round a timber door in stone or brick
- Draughts and rain around sash boxes
Questions from Upham
Is Upham in your area for sand mastic?
Yes. Our work covers London and the South East, and Upham is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Do you work for landlords with property near Hedge End station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little.
Are you insured?
Yes. Full insurance covers our work.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
When will the new mastic be hard?
Not straight away. The skin forms first, and the full set comes later and we’ll give you an idea for your job.
Is it OK to seal over old sealant?
No, it won’t 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.
About our sand mastic in Upham
Sand mastic skins over fairly quickly but full hardening takes longer. Traditional guidance is not to paint over it and we will advise if you’re redecorating. We are often asked to deal with gaps round a timber door in stone or brick and mastic dropping out of the joint, on brick reveals, stone surrounds and timber door frames.
In a village or hamlet like Upham, 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.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Upham (SO32)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the cost of sand mastic
Call for a quick quote. What matters most is:
- How many areas need sealing
- Which sealant suits the joint
- Whether the work is at height
- Any working-time requirements on site
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, ring 0345 464 0079 or email us for an honest opinion and a quote.
What we need to know
When you call or email, these details help:
- Where the property is
- Access, such as stairs, a lift or height
- Whether it’s a home or a business
- Pictures of the joints, sent by email
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you are ready, phone 0345 464 0079 or send us an email.
For landlords and businesses
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured for the work.
For anyone letting property in or around Upham, several properties can be quoted together. Just tell us the addresses and what each one needs.
Keeping the joints in good condition
Looking after new joints is easy:
- Renew mastic before redecorating the windows
- Find out about consent before window work on a listed home
- Have rotten timber repaired before new mastic goes in
- Leave the new mastic unpainted
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens as more mastic falls out.
What happens on the day
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take a few hours for a single window, longer for several. Somewhere like Upham needs a little journey planning: let us know about lanes, gates and parking. 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.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Let us know if you’ve seen damp or leaks
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
We do not publish a 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.
Advice
What the job involves on each surface
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Can I do it myself?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Signs you need sand mastic in Upham
Water gets into small cracks in the mastic and loosens it further. Windows facing the weather tend to go first.
Common reasons people contact us include:
- Cracked mastic round a front door frame
- Patchy fillers round a sash window
- Open joints round the window box
- A silicone bead on a sash window that spoils the look
Managing a site like Upham Church of England Aided Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- Which colour the sealant will be
- What product goes in the joint
- What the cure time is
- Whether all the old sealant comes out first
What else we do in Upham
Frames and glazing around Upham
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Hedge End station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about. Homes close to Church of St Mary include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Upham is about 5 miles east of Eastleigh, in Hampshire. From the centre of Upham to the outskirts, sand mastic is available for homes and businesses alike. Across Hampshire, we cover 683 places, and Upham is one of them. For nearby work, see our Southampton page.
We cover every part of SO32 for sand mastic. You will find streets such as Church Street, Shoe Lane and Widlers Lane, all of which we cover. Other places close to Upham include Ashton (1 mile south-east), Lower Upham (1 mile south-west), Wintershill (2 miles south-west), Durley Street (2 miles south-west) and Bishop's Waltham (2 miles south-east). Larger places within reach include Winchester (6 miles north-west), Gosport (13 miles south), Havant (14 miles south-east), Eastleigh (5 miles west), Fareham (9 miles south) and Horndean (11 miles south-east).
Around Upham
Around Upham, our work takes us to homes and buildings near Brushmakers Arms, among other places. For rail, the closest station is Hedge End station, roughly 4.4 miles south-west. Well-known places in the area include Moorgreen Hospital (5.4 miles south-west) and Bishop's Waltham Museum (2.1 miles south). Not far away are Bishops Waltham Branch LNR and Beacon Hill.