Hampshire · England
Sand mastic for sash & case windows in Ashurst, Hampshire
Window and door surrounds in Ashurst need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Open joints round the window box
- Old cement repairs round a window that have failed
- Crumbling sand mastic round a window
Sand mastic for homes and businesses in Ashurst
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from 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 draughty sash windows at the surround and silicone on a period window that looks wrong, we can put it right.
Around Ashurst, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Ashurst (SO40)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What the job involves on each surface
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we’ll confirm what’s needed.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Places near Ashurst
Other services in Ashurst
Ashurst questions
Can you help a landlord with a rental near Ashurst New Forest station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Do you cover smaller places like Ashurst?
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.
Should I check with the council before work on a listed or conservation-area home?
It’s best to ask your local planning authority first. Like-for-like sand mastic is often the preferred finish, but they decide.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
What is sand mastic?
Sand plus a binder based on linseed oil. It’s built up in the joint by hand and finished to sit neatly against the masonry.
How much does sand mastic cost in Ashurst?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before work begins.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
Will it make a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Inspect the joints round the windows every year or so
- Go gently near the mastic when preparing windows
- Do not paint over the new mastic
- Don’t run silicone over sand mastic
Do not touch or press the mastic while it hardens. It skins over quickly but needs longer to fully harden.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
Why act early in Ashurst
Filling over old, loose mastic doesn’t last. We remove the loose material first so the new mastic stays put. Where a wall is exposed, as many are in small places like Ashurst, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or drop us an email and we will talk you through it.
Why choose Mr Mastic in Ashurst
- Over 20 years’ experience
- Tidy, careful work
- Old sealant always removed completely
- Experience in homes, commercial sites and hotels
Take a look at how sealant jobs are priced or our reviews.
Landlords, agents and businesses in Ashurst
We work for landlords and agents as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
Housing providers, facilities teams and property managers book us too in Ashurst and across Hampshire. We can quote a run of properties together, and we are fully insured.
When to call us in Ashurst
Previous repairs in cement or silicone often trap water or crack away. They don’t move with the timber and we normally remove them.
Look out for these signs:
- Draughty sash windows at the surround
- Weathered mastic on the most exposed windows
- Window mastic to renew ahead of painting
- Silicone on a period window that looks wrong
For landlords with property near Ashurst New Forest station, any sash windows need sound mastic to keep draughts and rain out.
Comparing quotes
- What preparation is included
- Is VAT in the price?
- What insurance they hold
- How much experience the applicator has
What happens on the day
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours per window, depending on the condition of the joints. Somewhere as small as Ashurst, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Let us know about parking restrictions
- Clear items away from the joints we’re working on
- Plan for the work area to be out of bounds to pets and children
How to get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or drop us an email.
Read more
What sand mastic looks like in Ashurst
Ashurst is within about 3 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Historic houses like Southampton Tudor House and Garden (about 4.8 miles east) are a reminder that the area around Ashurst has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Managing a site like Foxhills Infant School? Then its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near Colbury Christ Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Ashurst is about 2 miles south of Totton, in Hampshire. From the centre of Ashurst to the outskirts, sand mastic is available for homes and businesses alike. Our area takes in 683 places across Hampshire. We also work in Southampton, about 6 miles from Ashurst.
Postcode districts we cover here for sand mastic: SO40. Whether your property is on Ash Grove, Cecil Avenue and Dene Road or anywhere close by, we can help. Neighbouring places we cover for sand mastic include Colbury (1 mile east), Lyndhurst (3 miles south-west), Emery Down (4 miles south-west), Balmerlawn (5 miles south) and Brockenhurst (6 miles south-west). We also work in nearby towns such as Winchester (14 miles north-east), Eastleigh (9 miles north-east), Fareham (14 miles east), Chandler's Ford (8 miles north-east), Hedge End (9 miles east) and Lymington (10 miles south).
Around Ashurst
In Ashurst, that means homes and buildings near Hounsdown School and The Forest Inn and the streets around them. For rail, the closest station is Ashurst New Forest station, about 0.7 miles south-west of the centre. A little further out are Ashurst Hospital (0.6 miles south-west) and National Dairy Museum (0.5 miles south-east). Open spaces near Ashurst include Testwood Lakes.