Hampshire · England
Sand mastic for sash & case windows in Gosport, Hampshire
Specialist sand mastic for Gosport: careful preparation, the right product and tidy work. Call for a quick quote.
- Modern sealant on a period surround
- Tired mastic found when preparing windows for paint
- Mastic dropping out of the joint
About our sand mastic in Gosport
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It suits period and listed homes, where modern sealant can look out of place. We work on period & listed homes, brick reveals and tenement windows, and people most often call us about modern sealant on a period surround and draughts and rain around sash boxes.
Somewhere as small as Gosport, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
You get a 12-month guarantee, the same in Gosport as everywhere else we work.
- Where
- Gosport (SO51)
- Region
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
The process
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and clear up. It generally takes a few hours for a single window, longer for several. For a village or hamlet like Gosport, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
Before we arrive
- Mention any sign-in or site rules at work premises
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
Get 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, ring 0345 464 0079 or drop us an email.
Advice
Towns and villages near Gosport
More services for Gosport
What we are called out for in Gosport
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows.
Signs it’s time to call us include:
- A silicone bead on a sash window that spoils the look
- Window mastic to renew ahead of painting
- Mastic worn away on windows facing the weather
- Draughts and rain around sash boxes
If you let a flat or house near Chandlers Ford station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Comparing quotes
- Is the old sealant removed completely?
- When the joint can take water or movement
- Who does the work, and how experienced they are
- How the surfaces are prepared before sealing
Can I do it myself?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
FAQs for Gosport
Do you work for landlords with property near Chandlers Ford station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
Do you cover smaller places like Gosport?
Yes. Gosport is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
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.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and we will quote it together.
What guarantee comes with the work?
There’s a 12-month guarantee on every job.
Do I need to be at home?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Is sand mastic better than silicone for my windows?
We’ll talk it through with you. Period homes often look best with sand mastic, and modern sealants suit newer frames.
What affects the cost of sand mastic
We quote each job individually. These are the things that affect it:
- How many areas need sealing
- The number and length of the joints
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or email us.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- Access, such as stairs, a lift or height
- Roughly how big the job is
- A few photos by email, if you can
- Where the property is
There’s no standard price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or email us.
Sand mastic in Gosport: local notes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as Church of St Mark, the joint between an old wall and a newer frame is generally the first place rain gets in. For site and facilities teams at buildings such as Ampfield Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Gosport is about 2 miles east of Romsey, in Hampshire. We provide sand mastic to homes and businesses in Gosport and nearby. Our Hampshire coverage runs to 683 places, Gosport among them. We also work in Southampton, around 6 miles away.
Here we cover the SO51 postcode area for sand mastic. Close by, we work in Ampfield (1 mile north-east), Crampmoor (1 mile west), Knapp (1 mile north-east), Broadgate (1 mile east) and Lower Slackstead (2 miles north). We also work in nearby towns such as Winchester (6 miles north-east), Eastleigh (5 miles south-east), Fareham (15 miles south-east), Andover (14 miles north), Totton (7 miles south-west) and Hedge End (8 miles south-east).
Near you in Gosport
We work in homes and buildings around White Horse Public House and The Mountbatten School. The nearest railway station is Chandlers Ford station, roughly 2.6 miles south-east. Nearby you’ll also find King Johns House (2.9 miles west) and Romsey Community Hospital (2.2 miles west). Not far away are Emer Bog and Baddesley Common.
Landlord and commercial work in Gosport
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Housing providers, facilities teams and property managers book us too in Gosport and across Hampshire. We can quote a run of properties together, and we’re fully insured for the work.
What the job involves on each surface
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We work on single windows or whole elevations.
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
What sealant work cannot fix
We will always be straight with you, so here’s what sealant cannot fix:
- Sash cords, weights and draught-proofing of the sashes
- Masonry that needs repairing
- Broken panes
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Brick reveals
- Tenement windows
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Timber door frames