West Sussex · England
Sand Mastic in Newtimber
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Newtimber, with a one-year guarantee on every job. Call for a quick quote.
- Cracked mastic round a front door frame
- Draughty sash windows at the surround
- Old sand mastic that has cracked, crumbled or fallen out
Sand mastic in Newtimber
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. Renewing it closes the gap and tidies the surround. If you are dealing with window mastic to renew ahead of painting and patchy fillers round a sash window, we can put it right.
Around Newtimber, 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.
A 12-month guarantee comes as standard.
- Where
- Newtimber (BN6)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the quote in Newtimber
Some jobs are bigger than they look, and some smaller. The main factors:
- Any mould that needs treating
- How easy the joints are to reach
- How many areas need sealing
- The amount of work
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- Any access issues, like height or stairs
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
- What the problem is, such as mould, gaps, leaks or cracking
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved.
Different surfaces, different methods
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. Sand mastic is shaped by hand to suit.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
How to look after the new joints
So the new joints stay in good condition:
- Go gently near the mastic when preparing windows
- Inspect the joints round the windows every year or so
- Keep modern sealant off the mastic
- Sort the mastic before the decorators arrive
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
How the visit works
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. It normally takes anything from a few hours to a full day, depending on how many windows. Somewhere like Newtimber needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Before we arrive
- Move anything stored near the joints
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
Get a quote
Need a quote? Please ring 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.
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Your questions about sand mastic in Newtimber
Do you work for landlords with property near Hassocks station?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
Is Newtimber within the area you cover?
Yes, Newtimber is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can I paint the new mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
What do you put in the joint?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Are you insured?
Yes, we’re fully insured for every job we do.
How long does sand mastic take to go off?
Not straight away. It skins first and hardens fully later and we will give you an idea for your job.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
Frames and glazing around Newtimber
Historic houses like Portslade Manor (about 4.6 miles south) are a reminder that the area around Newtimber 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. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Hassocks station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Newtimber is about 5 miles south-west of Burgess Hill, in West Sussex. Newtimber gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Newtimber is one of 371 places in West Sussex where we work for sand mastic. Our Brighton page covers work nearby (6 miles or so).
Every address in BN6 is covered for sand mastic. Nearby, we also carry out sand mastic in Clayton (2 miles east), Hurstpierpoint (2 miles north), Hurst Wickham (2 miles north-east), Hassocks (2 miles north-east) and Keymer (3 miles north-east). Larger places within reach include Crawley (14 miles north), Horsham (12 miles north-west), Worthing (11 miles south-west), Haywards Heath (8 miles north-east), Burgess Hill (5 miles north-east) and Shoreham-by-Sea (6 miles south-west).
Around Newtimber
For rail, the closest station is Hassocks station, roughly 2.4 miles north-east of the centre. Other landmarks nearby include The Dene Hospital (4.2 miles north) and The Budding Foundation Museum of Gardening (2.1 miles north-east). Open spaces near Newtimber include Woods Mill and Wolstonbury Hill.
Landlord and commercial work in Newtimber
Letting agents and landlords in Newtimber can book us as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
Towns and villages near Newtimber
Also in Newtimber
Do you need sand mastic in Newtimber?
Age is the main cause. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
Most people get in touch after spotting one of these:
- Gaps round a timber door in stone or brick
- Mastic worn away on windows facing the weather
- Gaps where the frame meets the masonry
- Cement or filler used on old window joints that has cracked
For an older house near a landmark such as The Parish Church of St John Evangelist, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- Whether they’re fully insured
- How the surfaces are prepared before sealing
- Whether they seal over old material or remove it
- Which sealant they’ll use, and why
What sealant work cannot fix
We’d rather tell you now than do work that won’t last, so these are the limits:
- Decisions on consent for listed homes
- Cracked or broken glass
- Timber that has rotted
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Newtimber
- Stone surrounds
- Brick reveals
- Tenement windows
- Sash and case windows
- Period & listed homes
- Timber door frames