Hampshire · England
Sand mastic for sash & case windows in Kempshott, Hampshire
Window and door surrounds in Kempshott need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Mastic worn away on windows facing the weather
- Crumbling sand mastic round a window
- Open joints round the window box
Sand mastic in Kempshott: local notes
Historic houses like The Vyne (about 4.9 miles north-east) are a reminder that the area around Kempshott has older buildings as well as new. 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. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near Saint Mark's Church, the joint between an old wall and a newer frame is normally the first place rain gets in. Letting a property close to Basingstoke station? Then any sash windows need sound mastic to keep draughts and rain out. If you look after a building such as Kempshott Junior School, larger buildings have plenty of frames, and the mastic around each one ages.
Kempshott is about 2 miles south-west of Basingstoke, in Hampshire. If you need sand mastic in Kempshott, please phone 0345 464 0079 or send us an email for a quick quote. We cover Hampshire from our Crawley base. Our area takes in 683 places across Hampshire. There’s also a page for Reading, roughly 16 miles from Kempshott.
We cover every part of RG22 and RG23 for sand mastic and the streets around it. Whether your property is on Roman Road, Aster Road and Osprey Road or anywhere close by, our applicators can take on the job. We also cover Buckskin (1 mile north), Hatch Warren (1 mile south-east), Worting (1 mile north), Brighton Hill (1 mile east) and South Ham (2 miles north-east). Larger places within reach include Winchester (15 miles south-west), Fleet (13 miles east), Andover (15 miles west), Alton (10 miles south-east), Yateley (15 miles north-east) and Tadley (8 miles north).
Near you in Kempshott
In Kempshott, that means homes and buildings near Brighton Hill Community School and Coppice Spring School and the streets around them. The nearest railway station is Basingstoke station, roughly 2.8 miles north-east of the centre. Well-known places in the area include Willis Museum (2.6 miles north-east) and The Malls (2.8 miles north-east). Not far away are Daneshill Park Woods and Farleigh Hill.
Sand mastic in Kempshott, done properly
Fresh sand mastic forms a skin quite soon but full hardening takes longer. Traditional guidance is not to paint over it, so ask us before you decorate. We work on period & listed homes, tenement windows and sash and case windows, and people most often call us about a silicone bead on a sash window that spoils the look and weathered mastic on the most exposed windows.
In a smaller place like Kempshott, some walls face open ground and catch the full force of the weather. That’s hard on the mastic around frames and sills.
Your job is guaranteed for a year, as with all our work.
- Location
- Kempshott (RG22, RG23)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in Kempshott
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic matches what was there and that can be important for listed homes. In a smaller place like Kempshott, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Doing several joints on one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. We will give you a clear price for the lot.
Why book with us
- More than 20 years in sealant work
- Trusted Arbo and Everbuild sealants
- Approved under the ARBOMaster scheme
- Tidy, careful work
Read our cost guide and customer reviews.
What the job involves on each surface
Tenement and terrace windows
Windows above ground floor need the right access. Let us know the floor and we’ll confirm access.
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
How to look after the new joints
A little care helps the new joints last. We recommend:
- Ask us before painting near the mastic
- Don’t run silicone over sand mastic
- Ask the planning authority about consent for listed or conservation-area homes
- Go gently near the mastic when preparing windows
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
DIY versus a professional finish
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Places near Kempshott
More services for Kempshott
What we can’t put right
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Sashes that need overhauling
- Decayed frames that need repair
- Planning or listed building consent (your local planning authority decides)
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Tenement windows
- Period & listed homes
- Stone surrounds
- Timber door frames
- Sash and case windows
- Brick reveals
Kempshott questions
Do you cover Kempshott for sand mastic?
Yes, Kempshott is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
I let a flat near Basingstoke station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Is it OK to seal over old sealant?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
Is consent needed for window work on a listed home?
Your local planning authority is the one to ask. They decide whether consent is needed for work to your windows.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is normally more efficient.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
How long does the job take?
It depends on the size of the job, but as a guide it takes a few hours for a single window, longer for several. We will tell you when we quote.
Landlords, agents and businesses in Kempshott
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
The process
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the job takes anything from a few hours to a full day, depending on how many windows for a typical job. For a job in Kempshott, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- 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.
Before we arrive
- Mention any parking rules near the property
- Try not to wet indoor joints just before the visit
- Mention any tricky access
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.