Hampshire · England
South Warnborough Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in South Warnborough, with a 12-month guarantee on every job. Ask us for a quote.
- Draughty sash windows at the surround
- A silicone bead on a sash window that spoils the look
- Cracked mastic round a front door frame
About our sand mastic in South Warnborough
Across South Warnborough, we renew sand mastic around sash and case windows. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. If you’re dealing with cracked mastic round a front door frame and old sand mastic that has cracked, crumbled or fallen out, we can help.
Mastic can only go onto a dry, clean joint, so window work in South Warnborough is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Each job carries a 12-month guarantee, whatever its size.
- Where
- South Warnborough (RG29)
- Region
- Hampshire
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Why deal with it now?
Replacing sash windows is a big decision for a period home and on a listed home, consent may be needed. Where the frames are in good order, new mastic seals the surround. Where a wall is exposed, as many are in small places like South Warnborough, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
What you get with us
- More than 20 years in sealant work
- 4.9 on Google from 180+ five-star reviews
- Old sealant always removed completely
- Arbo and Everbuild products
See how sealant jobs are priced and our reviews.
Places near South Warnborough
Other services in South Warnborough
What we do, step by step
The work is kept neat and contained to the joints we are treating. Expect the work to take anything from a few hours to a full day, depending on how many windows. Somewhere as small as South Warnborough, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- 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
- Let us know about earlier repairs to the joints
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
Get a quote
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before work begins.
Related advice
How to look after the new joints
After the cure time, these simple habits help:
- Clear gutters so water does not pour onto the windows
- Go gently near the mastic when preparing windows
- Find out about consent before window work on a listed home
- Keep modern sealant off the mastic
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Frames and glazing around South Warnborough
The South East is one of 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 Robert May's School, the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Hook station, older sash windows in a rental need their mastic kept sound to keep the weather out.
South Warnborough is about 5 miles north of Alton, in Hampshire. From the centre of South Warnborough to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 683 places in Hampshire are on our list, from the larger towns to small villages. You can also see our page for Reading, roughly 16 miles from South Warnborough.
We cover every part of the RG29 postcode area for sand mastic. That includes homes and businesses on Gaston Lane, Tigwells Field and Alton Road and the roads around them. We also cover the places around South Warnborough: Long Sutton (1 mile east), Bidden (1 mile north-west), Little Hoddington (1 mile north-west), Well (2 miles east) and Greywell (3 miles north). Larger places within reach include Basingstoke (7 miles north-west), Farnborough (10 miles north-east), Fleet (7 miles north-east), Aldershot (9 miles east), Alton (5 miles south) and Petersfield (15 miles south).
Around South Warnborough
The nearest railway station is Hook station, roughly 3.9 miles north of the centre. Nearby you will also find Odiham Castle (2.7 miles north) and Gliding Heritage Centre (3.5 miles south-west). Not far away are Holybourne Hill and Dogmersfield Lake.
South Warnborough: your questions answered
Do you cover smaller places like South Warnborough?
Yes. South Warnborough is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for landlords with property near Hook station?
Yes, we work for landlords and letting agents. You can phone 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.
Is consent needed for window work on a listed home?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for listed or conservation-area properties.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or email us.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.
What exactly is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It’s made with sand and a linseed-oil-based binder.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
What sealant do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Do you need sand mastic in South Warnborough?
Paint, silicone or cement used over old mastic causes problems. They don’t move with the timber and we normally remove them.
Most people get in touch after spotting one of these:
- Gaps between timber frames and stone or brick
- Modern sealant on a period surround
- Draughty sash windows at the surround
- Old sand mastic that has cracked, crumbled or fallen out
For an older house near a landmark such as Church of St Andrew, the joint between an old wall and a newer frame is generally the first place rain gets in.
What your quote should include
- Is VAT in the price?
- How the colour is chosen
- How hidden problems are handled
- When the joint can take water or movement
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Different surfaces, different methods
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
Brick reveals
Sand mastic is also used where timber frames meet brick. It suits older brickwork.
Landlords, agents and businesses in South Warnborough
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.