Hampshire · England
Warsash Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Warsash and across Hampshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Draughty sash windows at the surround
- Silicone on a period window that looks wrong
- Mastic worn away on windows facing the weather
About our sand mastic in Warsash
We renew sand mastic around sash windows and doors set in stone or brick. The old mastic is raked out, and new mastic is applied and shaped by hand. We are often asked to deal with window mastic to renew ahead of painting and cement or filler used on old window joints that has cracked, across tenement windows, sash and case windows and period & listed homes.
Houses in smaller places like Warsash can stand more in the open than those in a built-up town, so exposed windows and doors face the weather head on. The mastic around frames on those walls tends to age faster.
A 12-month guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- Warsash (SO31)
- Region
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Windows and doors in Warsash
Warsash is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Church of St Mary, the joint between an old wall and a newer frame is usually the first place rain gets in. For landlords with property near Swanwick station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Warsash is about 4 miles west of Fareham, in Hampshire. Our applicators cover sand mastic for homeowners, landlords and businesses in Warsash and nearby, as part of our work across Hampshire. Across Hampshire, we cover 683 places, Warsash among them. You can also see our page for Southampton, roughly 6 miles from Warsash.
Our applicators cover all of the SO31 postcode area for sand mastic. Sand mastic is available to properties on Church Road, Wild Rose Crescent and Willow Herb Close and the roads around them. We also cover the places around Warsash: Sarisbury Green (1 mile north), Locks Heath (1 mile north-east), Hook (1 mile south-east), Hook Park Estate (1 mile south) and Abshot (1 mile south-east). Within a short drive, we also cover Winchester (14 miles north), Gosport (7 miles south-east), Havant (13 miles east), Eastleigh (8 miles north), Fareham (4 miles east) and Horndean (13 miles east).
What’s near Warsash
Typical jobs here are in homes near Brookfield Community School and Language College, Hamble Common and Jolly Farmer Public House, among other places. The nearest railway station is Swanwick station, roughly 1.6 miles north-east. A little further out are Coldeast (0.9 miles north) and Bursledon Brickworks Industrial Museum (2.1 miles north). Not far away are Holly Hill Woodland Park.
Also in Warsash
How the visit works
Most of a good job is in the preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a single window, longer for several. A visit to Warsash 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.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us if parking is tricky
- Clear items away from the joints we are working on
Get a quote
Want a quote for sand mastic? Please call 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
What we cannot put right
Before you book, it’s worth knowing the limits too:
- Decayed frames that need repair
- Cracked or broken glass
- Masonry that needs repairing
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Surfaces we seal
- Sash and case windows
- Brick reveals
- Stone surrounds
- Tenement windows
- Timber door frames
- Period & listed homes
Your questions about sand mastic in Warsash
Do you work for landlords with property near Swanwick station?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Does the coastal weather in Warsash affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are normally the first to need attention.
Is the work guaranteed?
There’s a 12-month guarantee on every job, sand mastic included.
Is it messy?
Tidy work is part of the job. Nearby surfaces are protected.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Do you offer different sealant colours?
We help you choose a colour that suits. The choice depends on the product the joint needs.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Common problems we fix in Warsash
Water gets into small cracks in the mastic and loosens it further. Windows facing the weather tend to go first.
If you can see any of these, it’s time to have the joints looked at:
- Mastic worn away on windows facing the weather
- Mastic round period door frames that has failed
- Crumbling sand mastic round a window
- Gaps between timber frames and stone or brick
Managing a site like Hook-With-Warsash Church of England Academy? Then the mastic around its windows and doors needs looking after like any other building’s.
Before you book anyone
- Whether all the old sealant comes out first
- Whether they’re fully insured
- How hidden problems are handled
- Which colour the sealant will be
Leave it or put it right?
Not every filler suits an old window surround. Sand mastic matches what was there and that can be important for listed homes. Around Warsash, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts.
Why choose Mr Mastic in Warsash
- A 12-month guarantee on all work
- Tidy, careful work
- Homes, businesses and hotels
- Sanitary silicone with an anti-fungal additive in wet areas
See what affects the cost and what customers say.
What affects the quote in Warsash
There’s no set price list, because jobs vary so much. What we look at:
- The number of rooms or windows
- Whether there’s mould to deal with
- Any working-time requirements on site
- How easy the joints are to reach
Leaving a failed joint generally makes the job bigger, not smaller. If you are not sure whether it needs doing, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Helping us quote
What to tell us when you ask for a quote:
- How we’d reach the joints
- Whether it’s a home or a business
- Any previous sealing or DIY work
- A few photos by email, if you can
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before work begins.