Hampshire · England
Sand mastic for sash & case windows in Old Basing, Hampshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Old Basing and across Hampshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Modern sealant on a period surround
- Patchy fillers round a sash window
- Draughts and rain around sash boxes
What happens if it’s left?
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic suits the building and finishes neatly against the masonry. Homes in smaller places like Old Basing can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- Anti-fungal sanitary silicone in wet areas
- Rated 4.9 stars on Google
- Neat joints and a tidy finish
- Any old sealant cut out fully, not covered over
See what affects the cost and customer reviews.
Sand mastic in Old Basing, done properly
We renew sand mastic around sash windows and doors in stone and brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. If you have old sand mastic that has cracked, crumbled or fallen out and cement or filler used on old window joints that has cracked, we can help.
Homes around Old Basing range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Old Basing (RG24)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Old Basing
Do you cover smaller places like Old Basing?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Old Basing in your area for sand mastic?
Yes, Old Basing is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and let us know what needs doing, and we’ll send you a clear quote.
How long does sand mastic take to harden?
Not right away. It skins first and hardens fully later and we’ll give you an idea for your job.
Are you insured?
Yes. We are fully insured.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
What does sand mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and you will get one quote.
Signs you need sand mastic in Old Basing
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows.
If you can see any of these, it’s time to have the joints looked at:
- Weathered mastic on the most exposed windows
- Old sand mastic that has cracked, crumbled or fallen out
- Draughts and rain around sash boxes
- Patchy fillers round a sash window
If you let a flat or house near Basingstoke station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
What your quote should include
- What preparation is included
- What happens if they find a problem under the old sealant
- What the quote includes, VAT included or not
- The length of the guarantee
How the visit works
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it usually takes anything from a few hours to a full day, depending on how many windows. In a smaller place like Old Basing, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
How to prepare
- On commercial sites, let us know about site rules
- Mention any tricky access
- Clear the area around the work
Getting a quote
Want a quote for sand mastic? Please call 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Read more
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Towns and villages near Old Basing
Other services in Old Basing
What affects the cost of sand mastic
We do not publish a price list, because jobs vary so much. What we look at:
- The product the joint needs
- Any mould that needs treating
- How many areas need sealing
- When we can work, for business premises
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, phone 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What to tell us for a quote
What to tell us when you ask for a quote:
- A few photos by email, if you can
- How we’d reach the joints
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work.
What sand mastic looks like in Old Basing
With historic houses such as The Vyne (about 3.3 miles north-west) nearby, there’s older building stock in the area around Old Basing as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Old Basing Infant School, its window and door frames need their mastic kept sound, just like a home’s. In the older streets around Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Old Basing is about 3 miles east of Basingstoke, in Hampshire. Our applicators cover sand mastic for homeowners, landlords and businesses in Old Basing and nearby. Old Basing is one of 683 places in Hampshire where we work for sand mastic. We also work in Reading, around 13 miles away.
Postcode districts we cover here for sand mastic: RG24. If you need sand mastic at a property on The Street, London Road and Paulet Place or anywhere close by, our applicators can take on the job. We also cover Lychpit (1 mile west), Mapledurwell (1 mile east), Andwell (1 mile east), Water End (2 miles east) and Chineham (2 miles north). Within a short drive, we also cover Basingstoke (3 miles west), Farnborough (12 miles east), Fleet (9 miles east), Aldershot (12 miles east), Alton (9 miles south) and Yateley (10 miles north-east).
Around Old Basing
Around Old Basing, our work takes us to homes and buildings near The Costello School, Eastrop Park and The Crown Public House and the streets around them. The closest station to Old Basing is Basingstoke station, about 2 miles west. Nearby you will also find Festival Place (1.9 miles west) and Basing House (under half a mile west). For a walk, there’s Farleigh Hill and The Mill Field.
How the job changes by surface
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We work on single windows or whole elevations.
Stone surrounds
Old stone surrounds are often uneven, so the gap isn’t the same all the way round. We shape it by hand to follow the stone.
Aftercare tips
Good habits help new joints last longer. A few tips:
- Plan mastic work ahead of painting
- Get any rot dealt with first
- Don’t paint over the new mastic
- Keep sills and gutters clear so water drains away
Leave the new mastic alone while it firms up. It forms a skin fairly soon but needs longer to fully harden.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger as more mastic falls out.