East Sussex · England
Sand Mastic in Down Street
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Down Street and across East Sussex. Fully insured, ARBOMaster approved and guaranteed for a year.
- Draughts and rain around sash boxes
- Cracked mastic round a front door frame
- Modern sealant on a period surround
Sand mastic in Down Street
Burnt sand mastic is a traditional material blends with stone and brick surrounds. It’s a good fit for period properties, where modern sealant can look out of place. We work on tenement windows, sash and case windows and period & listed homes, and the jobs we see most are old cement repairs round a window that have failed and modern sealant on a period surround.
Somewhere as small as Down Street, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
All our work is covered by a 12-month guarantee, wherever you are in East Sussex.
- Where
- Down Street (TN22)
- Region
- East Sussex
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
Towns and villages near Down Street
What else we do in Down Street
What sand mastic looks like in Down Street
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.
For landlords with property near Uckfield station, older sash windows in a rental need their mastic kept sound to keep the weather out. In the older streets around The Parish Church of St Andrew and St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For site and facilities teams at buildings such as Fletching Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Down Street is about 3 miles north-west of Uckfield, in East Sussex. If you need sand mastic in Down Street, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We are based in Crawley and cover East Sussex, Down Street included. Our area takes in 289 places across East Sussex, large and small. We also work in Crawley, about 13 miles from Down Street.
Work in TN22 is quoted and booked the same way as anywhere else. We also cover the places around Down Street: Maresfield (1 mile east), Budlett's Common (2 miles east), Newick (3 miles south-west), Founthill (3 miles south-west) and Ridgewood (3 miles south-east). We also work in nearby towns such as Seaford (15 miles south), Lewes (9 miles south), Hailsham (13 miles south-east), Crowborough (6 miles north-east), Uckfield (3 miles south-east) and Newhaven (14 miles south).
Around Down Street
In Down Street, that means homes and buildings near West Park and the streets around them. The closest station to Down Street is Uckfield station, roughly 2.6 miles south-east of the centre. Other landmarks nearby include Uckfield Community Hospital (3 miles south-east) and Heaven Farm Museum (2.8 miles north-west). Open spaces near Down Street include Brickfield Meadow.
Why deal with it now?
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic is the like-for-like choice and that can be important for listed homes. Older cottages and farmhouses around Down Street can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Why book with us
- 180+ five-star Google reviews
- ARBOMaster approved applicator
- Old sealant always removed completely
- Domestic, commercial and hotel work
Take a look at what affects the cost or what customers say.
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Inspect the joints round the windows every year or so
- Ask a joiner to look at soft timber first
- Find out about consent before window work on a listed home
- Keep sills and gutters clear so water drains away
Leave the new mastic unpainted, which is the traditional advice. If you’re redecorating, ask us first.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Your questions about sand mastic in Down Street
Is Down Street within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Uckfield station?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
What does sand mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Can sand mastic be painted?
Traditional guidance is not to paint over sand mastic. If you are redecorating the window, ask us first and we will talk you through it.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Which products do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we are using and why.
What happens on the day
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. It normally takes anything from a few hours to a full day, depending on how many windows. In a small place like Down Street, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Clear items away from the joints we’re working on
- Tell us about any previous sealing or DIY attempts
Getting a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few photos by email make the job easier to understand.
Read more
Quotes for sand mastic in Down Street
The price is agreed before any work begins. It’s based on:
- Working hours on commercial sites
- Mould in or behind the old joints
- How many areas need sealing
- Whether the work is at height
Leaving a failed joint usually makes the job bigger, not smaller. If you are unsure, ring 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Helping us quote
There’s no need for technical detail. Just tell us:
- Roughly how big the job is
- What’s wrong with the joints now
- A few pictures by email, if you can
- How we’d reach the joints
For a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear quote before any work starts.
Different surfaces, different methods
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Period and listed homes
Materials matter on listed and conservation-area homes. Sand mastic is often the preferred finish.
When something else is needed
In fairness, there are a few things sealant will not fix:
- Broken panes
- Crumbling stone or brickwork round the window
- Whether work needs listed building consent
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think before booking.
Where we work in Down Street
- Brick reveals
- Tenement windows
- Stone surrounds
- Timber door frames
- Period & listed homes
- Sash and case windows