Hampshire · England
Sand Mastic in Southrope
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Southrope and across Hampshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Weathered mastic on the most exposed windows
- Gaps between timber frames and stone or brick
- Tired mastic found when preparing windows for paint
About our sand mastic in Southrope
A silicone bead around a sash window can look out of place and does not suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. If you are dealing with mastic dropping out of the joint and silicone on a period window that looks wrong, we can put it right.
Homes in small places like Southrope often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Southrope (RG25)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Southrope homes and the weather
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Hall Place (about 3.1 miles south) are a reminder that the area around Southrope has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Letting a property close to Alton station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Southrope is about 4 miles north-west of Alton, in Hampshire. From the centre of Southrope to the outskirts, we cover sand mastic for every kind of property. Across Hampshire, we cover 683 places, Southrope among them. There’s also a page for Reading, about 17 miles away.
Postcode districts we cover here for sand mastic: RG25. Streets in the area include King Johns Lane, Back Lane and Hockleys Lane, all of which we cover. Neighbouring places we cover for sand mastic include Bagmore (1 mile west), Burkham (2 miles south-west), Shalden Green (2 miles south-east), Shalden (2 miles south-east) and Bentworth (3 miles south). We also work in nearby towns such as Basingstoke (5 miles north-west), Winchester (15 miles south-west), Farnborough (14 miles north-east), Fleet (10 miles north-east), Aldershot (13 miles east) and Alton (4 miles south-east).
Local landmarks in Southrope
The nearest railway station is Alton station, roughly 4.5 miles south-east. Well-known places in the area include Gliding Heritage Centre (1.2 miles south-east) and Basing House (4.9 miles north). Not far away are Holybourne Hill.
What we are called out for in Southrope
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint.
The problems people normally mention when they call are:
- Mastic worn away on windows facing the weather
- Mastic that needs renewing before redecorating
- Gaps round a timber door in stone or brick
- Crumbling sand mastic round a window
For an older house near a landmark such as Church of St. Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What your quote should include
- How hidden problems are handled
- What product goes in the joint
- How long the guarantee is
- How the colour is chosen
How we quote for sand mastic
You’ll get a clear quote before work begins. It takes into account:
- Any mould that needs treating
- Whether the work is at height
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- Where the property is
- Access, such as stairs, a lift or height
- The rough size of the job
- What’s wrong with the joints now
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or drop us an email.
DIY versus a professional finish
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.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Questions from Southrope
Is Southrope in your area for sand mastic?
Yes, Southrope is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or email us with a few details of the job, and we will give you a clear quote.
I let a flat near Alton station. Can you help?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear price.
Can I paint the new mastic?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
Are you fully insured?
Yes. We’re fully insured.
How long does sand mastic take?
Typically it takes anything from a few hours to a full day, depending on how many windows. Bigger jobs take longer.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will explain our choice.
Is there any odour?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Where are you based?
We work from Crawley. Our applicators cover Southrope, along with the rest of our area.
Surface by surface
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
The process
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and clear up. It usually takes anything from a few hours to a full day, depending on how many windows. In a small place like Southrope, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Before we arrive
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
If you’re in Southrope and need sand mastic, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
Other services in Southrope
Why act early in Southrope
An open joint round the frame lets weather in. Water can get to the frame and the masonry so renewing it early protects the window. Where a wall is exposed, as many are in small places like Southrope, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
What you get with us
- Trusted Arbo and Everbuild sealants
- Anti-fungal sanitary silicone in wet areas
- More than 20 years in sealant work
- Homes, businesses and hotels
Take a look at how sealant jobs are priced or what customers say.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. Our tips:
- Ask a joiner to look at soft timber first
- Sort the mastic before the decorators arrive
- Avoid patching sand mastic with silicone
- Leave the new mastic unpainted
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.