Hampshire · England
Sand mastic for sash & case windows in Lyndhurst, Hampshire
Sand mastic across Lyndhurst and nearby, with old sealant always removed completely.
- Draughts and rain around sash boxes
- Gaps round a timber door in stone or brick
- Old sand mastic that has cracked, crumbled or fallen out
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Sand mastic in Lyndhurst, done properly
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. 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. Typical jobs include draughty sash windows at the surround and open joints round the window box, on sash and case windows, timber door frames and period & listed homes.
In a smaller place like Lyndhurst, some walls face open ground and catch the full force of the weather. That’s hard on the mastic around frames and sills.
There’s a 12-month guarantee on every job.
- Where
- Lyndhurst (SO43)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What affects the cost of sand mastic
The price is agreed before any work begins. It’s based on:
- Working hours on commercial sites
- Whether the work is at height
- The size of the job
- Whether old sealant or filler has to be cut out
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
What we need to know
You don’t need to know the technical terms. It helps if you can tell us:
- Where the property is
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
- Any access issues, like height or stairs
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
How it works
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the job takes a few hours for a single window, longer for several for a typical job. A visit to Lyndhurst is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- Let us know about stairs, lifts or work at height
- Where the joints are inside, avoid wetting them before we arrive
- Clear the area around the work
Ask for a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. When it suits you, phone 0345 464 0079 or email us.
Related advice
What sealant work can’t fix
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Cracked or broken glass
- Sash cords, weights and draught-proofing of the sashes
- Crumbling stone or brickwork round the window
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer before booking.
What we seal
- Stone surrounds
- Sash and case windows
- Brick reveals
- Tenement windows
- Period & listed homes
- Timber door frames
Nearby places to Lyndhurst
Other services in Lyndhurst
Signs you need sand mastic in Lyndhurst
Paint, silicone or cement used over old mastic causes problems. They do not move with the timber, and they usually need raking out.
These are the problems we’re asked about most:
- Tired mastic found when preparing windows for paint
- Draughty sash windows at the surround
- Gaps round a timber door in stone or brick
- Weathered mastic on the most exposed windows
For landlords with property near Ashurst New Forest station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Questions to ask before you book
- What insurance they hold
- What the quote includes, VAT included or not
- How long to leave it before use
- Who turns up on the day
Landlord and commercial work in Lyndhurst
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
How the job changes by surface
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. We rake it out and renew it.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
Windows and doors in Lyndhurst
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Homes close to Church of Our Lady and St Edward include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. Schools such as St Michael and All Angels CofE Infant School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Lyndhurst is about 4 miles south-west of Totton, in Hampshire. Anywhere in SO43, we can carry out sand mastic at your property. Lyndhurst is one of 683 towns and villages in Hampshire where we work for sand mastic. Our Southampton page covers work nearby, about 9 miles away.
Jobs for sand mastic in SO43 is quoted and booked the same way as anywhere else. Whether your property is on High Street, King's Close and Empress Road or anywhere close by, our applicators can take on the job. Neighbouring places we cover for sand mastic include Emery Down (1 mile west), Ashurst (3 miles north-east), Balmerlawn (3 miles south), Colbury (4 miles north-east) and Brockenhurst (4 miles south). Larger places within reach include Eastleigh (12 miles north-east), Totton (4 miles north-east), Chandler's Ford (11 miles north-east), Hedge End (12 miles east), Lymington (8 miles south) and Romsey (9 miles north-east).
Around Lyndhurst
Locally, jobs take us to homes and businesses close to Fox And Hounds Public House, among other places. Lyndhurst’s nearest station is Ashurst New Forest station, roughly 2.4 miles north-east of the centre. A little further out are Ashurst Hospital (2.6 miles north-east) and National Dairy Museum (3.4 miles north-east). The countryside around Lyndhurst includes Copythorne Common.
Lyndhurst: your questions answered
Do you work for landlords with property near Ashurst New Forest station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Is Lyndhurst in your area for sand mastic?
Yes. We work across London and the South East, and Lyndhurst is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we will send you a clear quote.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic can sit properly.
Which products do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Which is right for my windows, sand mastic or modern sealant?
That depends on your windows. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
Can I add another job to the visit?
Yes. More than one area can go on one quote.
How do I get a quote for sand mastic in Lyndhurst?
It depends on the job, so we quote each one individually. For a quick quote, ring 0345 464 0079 or drop us an email and tell us what needs doing and where.
Where do you work from?
We’re based in Crawley, and we cover South East England, London and all of Scotland.