Hampshire · England
Sherborne St John Sand Mastic
Professional sand mastic in and around Sherborne St John, with every bit of old sealant taken out first.
- Gaps where the frame meets the masonry
- Cracked mastic round a front door frame
- Tired mastic found when preparing windows for paint
Sand mastic in Sherborne St John, done properly
A silicone bead around a sash window can look out of place and isn’t always the right material. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. Typical jobs include mastic worn away on windows facing the weather and old cement repairs round a window that have failed, on sash and case windows, stone surrounds and period & listed homes.
Somewhere as small as Sherborne St John, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
You’re covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Where
- Sherborne St John (RG24)
- Wider area
- Hampshire
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
A few problems are outside what sealant work can do:
- Cracked or broken glass
- Masonry that needs repairing
- Decayed frames that need repair
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
Surfaces we seal
- Timber door frames
- Sash and case windows
- Period & listed homes
- Brick reveals
- Stone surrounds
- Tenement windows
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Avoid heavy scraping on the mastic joint
- Get any rot dealt with first
- Don’t run silicone over sand mastic
- Inspect the joints round the windows every year or so
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
DIY versus a professional finish
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
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 does not work out, we can still put it right.
Places near Sherborne St John
Other services in Sherborne St John
What affects the cost of sand mastic
The quote reflects the job in front of us. We look at:
- Whether there’s mould to deal with
- The old material and how stubborn it is
- Whether the work is at height
- How much there is to do
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 email us for an honest opinion and a quote.
What to tell us for a quote
To make quoting easier, let us know:
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
- Any previous sealing or DIY work
- Roughly how big the job is
We don’t publish a price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Frames and glazing around Sherborne St John
With historic houses such as The Vyne (about 1.2 miles north-east) nearby, there’s older building stock in the area around Sherborne St John as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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. Andrew, the joint between an old wall and a newer frame is normally the first place rain gets in. Rented homes near Basingstoke station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. Schools such as Sherborne St John Church of England Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Sherborne St John is about 2 miles north of Basingstoke, in Hampshire. We carry out sand mastic for homes and businesses in Sherborne St John and the surrounding area. Sherborne St John is one of 683 towns and villages in Hampshire where we work for sand mastic. We also work in Reading, about 12 miles from Sherborne St John.
Postcode districts we cover here for sand mastic: RG24. You’ll find streets such as Cranes Road, Bourne Field and Church Path, and we cover them all. We also cover Rooksdown (1 mile south-west), Winklebury (2 miles south), Basingstoke (2 miles south), Worting (3 miles south-west) and South Ham (3 miles south). Larger places within reach include Farnborough (15 miles east), Fleet (12 miles east), Aldershot (15 miles east), Alton (12 miles south-east), Yateley (12 miles east) and Tadley (4 miles north).
What’s near Sherborne St John
Locally, jobs take us to homes and businesses close to Everest Community Academy, among other places. The closest station to Sherborne St John is Basingstoke station, about 2.1 miles south-east of the centre. Other landmarks nearby include Basing House (3.1 miles south-east) and Basingstoke and North Hampshire Hospital (1.1 miles south). For a walk, there’s Daneshill Park Woods.
Questions from Sherborne St John
Is Sherborne St John in your area for sand mastic?
Yes, Sherborne St John is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear price.
Is Sherborne St John within the area you cover?
Yes, Sherborne St John is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you work for landlords and businesses?
Yes. We work for homeowners, landlords, letting agents, businesses and hotels.
I’m a tenant. Can you help?
We’re happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Can you quote for more than one area?
Yes. Several rooms, windows or areas can go on one quote.
How long does sand mastic take to go off?
It takes a while. The skin forms first, and the full set comes later and we’ll give you an idea for your job.
How long will you be here?
That depends on how much there is to do, but most jobs take a few hours for a single window, longer for several. We’ll tell you when we quote.
Are you fully insured?
Yes. We are fully insured for every job we do.
Landlords, agents and businesses in Sherborne St John
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
How it works
We keep the work tidy and contained to the area we are working on. Expect the work to take a few hours for a single window, longer for several. For a village or hamlet like Sherborne St John, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- Let us know about parking restrictions
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
Get a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will take it from there.
Related advice
Different surfaces, different methods
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We can do one window or several.