Surrey · England
Sand mastic for sash & case windows in Newdigate, Surrey
Sand mastic across Newdigate and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Window mastic to renew ahead of painting
- Modern sealant on a period surround
- Gaps round a timber door in stone or brick
What the job involves on each surface
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. It’s renewed by hand.
Stone surrounds
The stone is treated with care when the old mastic comes out.
About our sand mastic in Newdigate
Sand mastic suits most period window surrounds. Newer frames usually get a flexible sealant instead, and we will talk through which suits your home. If you have tired mastic found when preparing windows for paint and open joints round the window box, we can help, whatever the surface.
Around Newdigate, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Newdigate (RH5)
- Region
- Surrey
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Newdigate
Also in Newdigate
Signs you need sand mastic in Newdigate
Shallow joints are a common cause. A thin layer doesn’t hold well, which is why we pack deep voids first and get the depth right.
It’s worth asking for a quote if you see:
- Wind and rain getting in round a sash window
- Window mastic to renew ahead of painting
- Modern sealant on a period surround
- Crumbling sand mastic round a window
In the older streets around Church of St Peter, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What to look for in a quote
- Whether they seal over old material or remove it
- What happens if the job turns out different
- Who does the work, and how experienced they are
- Whether the sealant suits the joint
Common questions in Newdigate
Do you cover Newdigate for sand mastic?
Yes, Newdigate is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we will give you a clear quote.
Do you work for landlords with property near Holmwood station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
When will the new mastic be hard?
It takes a while. It skins first and hardens fully later, and we’ll tell you what to expect.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
What do you need from me for a quote?
A short description and the location, with photos by email if possible. We will ask anything else we need to know.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Is sand mastic better than silicone for my windows?
Sand mastic usually suits period timber windows best. On modern frames, we’d normally use a flexible sealant, and we will explain why.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
DIY sealant or a professional job?
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.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
What happens on the day
Before we leave, we go over the finished joints with you. The visit itself generally takes a few hours per window, depending on the condition of the joints, depending on the amount of work. For a village or hamlet like Newdigate, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- 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 is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Keep pets and children clear of the area while we work
- Let us know about stairs, lifts or work at height
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Advice
What affects the quote in Newdigate
Every job gets its own quote. This is what makes a difference:
- Any working-time requirements on site
- Which sealant suits the joint
- Mould in or behind the old joints
- The old material and how stubborn it is
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Pictures of the joints, sent by email
- The rough size of the job
- What’s wrong with the joints now
- Where the job is, and your postcode
Want a quote for sand mastic? Please phone 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and give you a clear quote before we start.
When something else is needed
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Broken panes
- Whether work needs listed building consent
- Sashes that need overhauling
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Where we work in Newdigate
- Period & listed homes
- Timber door frames
- Tenement windows
- Sash and case windows
- Brick reveals
- Stone surrounds
Windows and doors in Newdigate
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For landlords with property near Holmwood station, cracked sand mastic around sash windows lets in the draughts tenants complain about. For site and facilities teams at buildings such as Newdigate CofE Endowed Aided Infant School, larger buildings have plenty of frames, and the mastic around each one ages.
Newdigate is about 5 miles south of Dorking, in Surrey. We carry out sand mastic for homeowners, landlords and businesses in Newdigate, as part of our work across Surrey. Newdigate is one of 395 towns and villages in Surrey we cover. For nearby work, see our Crawley page (6 miles or so).
Here we cover the RH5 postcode area for sand mastic. Local streets include Church Road, Underhill Road and Village Street, all of which we cover. If you’re just outside Newdigate, we cover Cudworth (1 mile east), Parkgate (1 mile north-east), Shellwood Cross (2 miles north), Russ Hill (2 miles south-east) and Nalderswood (3 miles north-east). Further out, we also cover Guildford (14 miles north-west), Epsom (12 miles north), Horley (5 miles east), Redhill (7 miles north-east), Ewell (13 miles north) and Reigate (6 miles north-east).
Near you in Newdigate
Typical jobs here are in homes near Six Bells pub and Newdigate Brickworks, among other places. The nearest railway station is Holmwood station, roughly 1.7 miles north-west. Well-known places in the area include Langley Green Hospital (4.9 miles south-east) and Betchworth Castle (4.9 miles north). For a walk, there’s Leith Hill and Vann Lake.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Renew mastic before redecorating the windows
- Do not run silicone over sand mastic
- Get any rot dealt with first
- Ask us before painting near the mastic
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger.