West Sussex · England
Sand mastic for sash & case windows in Ditchling, West Sussex
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Ditchling. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic that needs renewing before redecorating
- Cracked mastic round a front door frame
- Mastic dropping out of the joint
When to call us in Ditchling
Sand mastic slowly weathers. It hardens, cracks and starts to come away from the frame or the masonry.
Any of these means the joints need attention:
- Open joints round the window box
- Mastic dropping out of the joint
- Cement or filler used on old window joints that has cracked
- Weathered mastic on the most exposed windows
Homes close to Ditchling Unitarian Chapel include some older properties, and 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
- Are they insured?
- How hidden problems are handled
- Which sealant they’ll use, and why
- How much experience the applicator has
Sand mastic in Ditchling
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. We work on sash and case windows, period & listed homes and tenement windows, and common reasons people get in touch are gaps round a timber door in stone or brick and mastic dropping out of the joint.
Around Ditchling, 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.
Big or small, it’s backed by our one-year guarantee in Ditchling and across West Sussex.
- Location
- Ditchling (BN6)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of sand mastic
You’ll get a clear quote before any work starts. It takes into account:
- The number and length of the joints
- The old material and how stubborn it is
- How many rooms, windows or areas are involved
- Access and height
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Call for a quick quote and we’ll go through it with you.
Helping us quote
To help us quote quickly, let us know:
- Whether it has been sealed before
- Roughly how big the job is
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
Every job is quoted individually, so start by telling us what you need. Simply phone 0345 464 0079 or drop us an email and describe the job and send photos if you have them.
Different surfaces, different methods
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Tenement and terrace windows
Windows above ground floor need the right access. Let us know the floor and we will confirm access.
Ditchling questions
Do you work for landlords with property near Hassocks station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Can you do sand mastic in Ditchling?
Yes, Ditchling is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Where do you work from?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
How long does sand mastic take to go off?
The surface skins quite quickly, then hardens over a longer period. The weather and joint depth both affect it.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we’ll talk you through it.
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. We use products from Arbo and Everbuild.
Do you remove the old sealant?
Yes, always, and completely. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Ask the planning authority about consent for listed or conservation-area homes
- Make sure water runs off the sill
- Get any rot dealt with first
- Plan mastic work ahead of painting
Leave the new mastic unpainted, as traditional guidance advises. If you’re redecorating, ask us first.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Leave it or put it right?
If you are redecorating, renew the mastic first. Painting over failed mastic does not seal it, and the new mastic is traditionally left unpainted. Around Ditchling, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
Why choose Mr Mastic in Ditchling
- We are fully insured
- Experience in homes, commercial sites and hotels
- 20+ years of sealant experience
- Tidy, careful work
Take a look at how sealant jobs are priced and our reviews.
The process
We keep the work tidy and contained to the joints we are treating, so you can carry on as normal. The job normally takes a few hours per window, depending on the condition of the joints, and we tell you how long to leave it before we go. Somewhere as small as Ditchling, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
- Tell us about any previous sealing or DIY attempts
How to get a quote
If you are in Ditchling and need sand mastic, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Related advice
Places near Ditchling
Also in Ditchling
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Ditchling homes and the weather
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Hassocks station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Managing a site like Ditchling (St Margaret's) Church of England Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Ditchling is about 3 miles south of Burgess Hill, in West Sussex. Anywhere in BN6, we cover sand mastic for homes and businesses. Across West Sussex, we cover 371 places, Ditchling among them. For nearby work, see our Brighton page (6 miles or so).
We work across the BN6 postcode area for sand mastic. Whether your property is on High Street, The Twitten and Charlton Gardens or a nearby road, we can help. Close by, we work in Keymer (1 mile west), Westmeston (1 mile south), Hassocks (1 mile west), Clayton (2 miles south-west) and Hurst Wickham (2 miles north-west). Further out, we also cover Crawley (14 miles north), Horsham (13 miles north-west), Worthing (14 miles south-west), Haywards Heath (5 miles north), East Grinstead (15 miles north) and Shoreham-by-Sea (9 miles south-west).
Landmarks near Ditchling
We work in homes and buildings around Downlands Community School and The Bull Hotel and the streets around them. Ditchling’s nearest station is Hassocks station, roughly 1.4 miles west. Nearby you will also find Ditchling Museum of Art + Craft (within half a mile west) and The Dene Hospital (3.8 miles north-west). Green spaces nearby include Ditchling Beacon and Bedelands Farm Nature Reserve.