Hampshire · England
Newfound Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Newfound, with a 12-month guarantee on every job. Call for a quick quote.
- Silicone on a period window that looks wrong
- Cracked mastic round a front door frame
- Tired mastic found when preparing windows for paint
Sand mastic in Newfound
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. We rake it out and renew it and tidies the surround. We work on stone surrounds, period & listed homes and brick reveals, and common reasons people get in touch are a silicone bead on a sash window that spoils the look and failed mastic on an exposed elevation.
Outdoor sealant needs dry, clean surfaces, so work on frames around Newfound is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Your job is guaranteed for a year, as with all our work.
- Where
- Newfound (RG23)
- Region
- Hampshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What we do, step by step
You do not need to clear the whole room or building before we come, just the space around the work. We protect the rest, and the work takes a few hours for a single window, longer for several for a typical job. Somewhere as small as Newfound, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Tell us if parking is tricky
- On commercial sites, let us know about site rules
- Let us know about stairs, lifts or work at height
Getting a quote
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Advice
Common problems we fix in Newfound
Sand mastic slowly weathers. It dries out, cracks and loses its grip on the stone or timber.
The most common problems we see are:
- Old cement repairs round a window that have failed
- Window mastic to renew ahead of painting
- Silicone on a period window that looks wrong
- Cracked mastic round a front door frame
For site and facilities teams at buildings such as Oakley Infant School, the mastic around its windows and doors needs looking after like any other building’s.
Before you book anyone
- What product goes in the joint
- Whether you can choose the colour
- Who turns up on the day
- How long to leave it before use
Questions from Newfound
Do you cover Newfound for sand mastic?
Yes. We work across London and the South East, and Newfound is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
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 drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Where is Mr Mastic based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
What do you need from me for a quote?
Tell us what needs doing and where, with pictures by email if possible. If we need more, we will ask.
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.
Do you offer different sealant colours?
We help you choose a colour that suits, from white and clear to greys and other shades. The choice depends on the product the joint needs.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Frames and glazing around Newfound
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like The Vyne (about 4.8 miles north-east) are a reminder that the area around Newfound has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
For landlords with property near Basingstoke station, cracked sand mastic around sash windows lets in the draughts tenants complain about. If you live in an older home near St John's, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Newfound is about 3 miles west of Basingstoke, in Hampshire. For sand mastic in and around Newfound, please ring 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover Hampshire, Newfound included. Newfound is one of 683 towns and villages in Hampshire where we work. You can also see our page for Reading, about 15 miles away.
Work in RG23 works the same way as everywhere else we cover. Sand mastic is available to properties on Fox Lane, Dellfield and Foxmoor Close and the roads around them. Other places close to Newfound include Oakley (1 mile south-west), Worting (1 mile east), Buckskin (1 mile east), Kempshott (2 miles south-east) and Ibworth (2 miles north-west). Larger places within reach include Basingstoke (3 miles east), Winchester (15 miles south-west), Fleet (14 miles east), Andover (14 miles west), Alton (11 miles south-east) and Yateley (15 miles east).
Near you in Newfound
Typical jobs here are in homes near The Fox pub and Bishop Challoner Catholic Secondary School and the streets around them. The nearest railway station is Basingstoke station, roughly 3.5 miles east of the centre. Well-known places in the area include The Malls (3.5 miles east) and Willis Museum (3.5 miles east). Green spaces nearby include Daneshill Park Woods and Farleigh Hill.
How the job changes by surface
Period and listed homes
A traditional finish suits a period property.
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
What we can’t put right
It helps to know what we can’t do too:
- Timber that has rotted
- Sashes that need overhauling
- Crumbling stone or brickwork round the window
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
Joints and surfaces we work on
- Sash and case windows
- Timber door frames
- Period & listed homes
- Brick reveals
- Stone surrounds
- Tenement windows
Aftercare tips
So the new joints stay in good condition:
- Keep sills and gutters clear so water drains away
- Get any rot dealt with first
- Leave the new mastic unpainted
- Keep modern sealant off the mastic
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall so early renewal protects both.
Nearby places to Newfound
What else we do in Newfound
What happens if it’s left?
If you’re redecorating, renew the mastic first. Paint over cracked mastic won’t stop the gaps and traditional guidance is to leave the new mastic unpainted. Around Newfound, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Why Newfound clients choose us
- Neat joints and a tidy finish
- We never seal over old sealant
- Approved under the ARBOMaster scheme
- Anti-fungal sanitary silicone in wet areas
Take a look at our cost guide and what customers say.