Hampshire · England
Sand mastic for sash & case windows in Baybridge, Hampshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Baybridge and across Hampshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Old sand mastic that has cracked, crumbled or fallen out
- Wind and rain getting in round a sash window
- Tired mastic found when preparing windows for paint
How it works
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take anything from a few hours to a full day, depending on how many windows. Somewhere like Baybridge needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
Getting a quote
For a quote, phone 0345 464 0079 or drop us an email with the location and a short description of the problem. We will give you a clear quote before any work starts.
Related advice
Sand mastic in Baybridge, 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, applied by hand. On period homes, it looks right where silicone wouldn’t. If you’re dealing with mastic dropping out of the joint and tired mastic found when preparing windows for paint, we can put it right.
In a village or hamlet like Baybridge, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Each job carries a 12-month guarantee, large or small.
- Location
- Baybridge (SO21)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
We also work for property managers and facilities teams in Baybridge and across Hampshire. We can quote a run of properties together, and we are fully insured for the work.
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can go on one quote.
Also near Baybridge
What else we do in Baybridge
What we’re called out for in Baybridge
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
Signs it’s time to call us include:
- Tired mastic found when preparing windows for paint
- Open joints round the window box
- Crumbling sand mastic round a window
- Draughts and rain around sash boxes
If you let a flat or house near Shawford station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
What your quote should include
- What preparation is included
- Is the old sealant removed completely?
- What insurance they hold
- How hidden problems are handled
How we quote for sand mastic
Your quote is based on your job. We take into account:
- The amount of work
- How many areas need sealing
- Whether there’s mould to deal with
- How much old sealant there is and how hard it is to remove
Doing several joints on one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. We will give you a clear price for the lot.
Asking for a quote
Before you ask for a quote, have a think about:
- A few pictures by email, if you can
- Whether it’s a home or a business
- What’s wrong with the joints now
- The address or postcode of the job
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
How the job changes by surface
Brick reveals
We rake out the old mastic and pack deep voids before the new mastic goes in.
Period and listed homes
Materials matter on listed and conservation-area homes. Sand mastic is often the preferred finish.
How to look after the new joints
To keep the joints looking good and working properly:
- Plan mastic work ahead of painting
- Do not run silicone over sand mastic
- Look over the window mastic once a year
- Find out about consent before window work on a listed home
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
Windows and doors in Baybridge
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 look after a building such as Owslebury Primary School, the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as Church of St Andrew, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Baybridge is about 5 miles south-east of Winchester, in Hampshire. Jobs in Baybridge get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Our Hampshire coverage runs to 683 places, Baybridge among them. You can also see our page for Southampton, roughly 9 miles from Baybridge.
Every address in SO21 is covered for sand mastic. If you’re just outside Baybridge, we cover Owslebury (1 mile north-west), Owslebury Bottom (1 mile north-west), Hensting (2 miles west), Morestead (2 miles north-west) and Lane End (2 miles north-east). Further out, we also cover Winchester (5 miles north-west), Gosport (14 miles south), Havant (15 miles south-east), Eastleigh (5 miles south-west), Fareham (11 miles south) and Horndean (12 miles south-east).
Near you in Baybridge
In Baybridge, that means homes and buildings near Ship Inn, among other places. For rail, the closest station is Shawford station, about 3.5 miles west of the centre. Well-known places in the area include St John's Rooms And Chapel (4.7 miles north-west) and Bishop's Waltham Museum (3.8 miles south-east). Open spaces near Baybridge include Twyford Down and Hockley Meadows.
Common questions in Baybridge
Do you cover smaller places like Baybridge?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Baybridge for sand mastic?
Yes. Our work covers London and the South East, and Baybridge is part of that. Just call 0345 464 0079 or email us with a few details of the job.
Do you take out the old sealant first?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for listed or conservation-area properties.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints.
Can landlords and businesses book you?
Yes, we do. We work in homes, commercial premises and hotels.
When will the new mastic be hard?
The surface skins quite quickly, then hardens over a longer period. Timing depends on the weather and the joint.
Which products do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
Honest limits
We will always be straight with you, so here’s what new sealant will not do:
- Decisions on consent for listed homes
- Rotten sashes, sills or window boxes (a joiner’s job)
- Sashes that rattle, stick or will not open
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
Where we work in Baybridge
- Timber door frames
- Period & listed homes
- Brick reveals
- Tenement windows
- Stone surrounds
- Sash and case windows