East Sussex · England
Sand mastic for sash & case windows in Wilmington, East Sussex
Sand mastic for Wilmington and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Weathered mastic on the most exposed windows
- A silicone bead on a sash window that spoils the look
- Draughty sash windows at the surround
What affects the quote in Wilmington
Call for a quick quote. The main things that affect it are:
- The size of the job
- Whether there’s mould to deal with
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Helping us quote
To make quoting easier, let us know:
- A few photos by email, if you can
- If someone has resealed it before
- Roughly how big the job is
- The type of property
Every job is quoted individually. Just call 0345 464 0079 or send us an email with the details, and pictures are welcome.
Sand mastic in Wilmington, done properly
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. We work on period & listed homes, tenement windows and sash and case windows, and the jobs we see most are failed mastic on an exposed elevation and cement or filler used on old window joints that has cracked.
Outdoor sealant needs dry, clean surfaces, so work on frames around Wilmington is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
We stand behind the work with a 12-month guarantee, so you are covered after we have gone.
- Where
- Wilmington (BN26)
- Region
- East Sussex
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What we’re called out for in Wilmington
Age is the main cause. Even well-laid mastic needs renewing in time and how long it lasts depends on the weather it faces.
People generally contact us after spotting one of these:
- Open joints round the window box
- Mastic round period door frames that has failed
- Patchy fillers round a sash window
- Window mastic to renew ahead of painting
Schools such as Willingdon Community School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before booking
- The length of the guarantee
- Is VAT in the price?
- What happens if the job turns out different
- Are they insured?
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can go on one quote.
If you manage several properties in or around Wilmington, several properties can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
What the job involves on each surface
Period and listed homes
On a listed home or in a conservation area, the right material matters. Like-for-like sand mastic is usually favoured.
Sash and case windows
On a sash window, the mastic joint shows on the outside, so a neat, even finish matters.
FAQs for Wilmington
Is Wilmington in your area for sand mastic?
Yes, Wilmington is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
I let a flat near Berwick (Sussex) station. Can you help?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first.
Can you replace silicone on a period window with sand mastic?
In most cases. We remove the silicone and clean the joint before the sand mastic goes 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.
What is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s applied by hand and shaped to suit the surround.
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.
What should I tell you?
Let us know what needs doing and where. We will ask anything else we need to know.
Can I do it myself?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Why it’s worth doing now in Wilmington
Cement-based fillers and modern sealants don’t always suit a period surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. Around Wilmington, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why book with us
- Anti-fungal silicone where joints get wet
- Full insurance on every job
- Experience in homes, commercial sites and hotels
- Neat joints and a tidy finish
Read our cost guide and our reviews.
Wilmington homes and the weather
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Alfriston Clergy House (about 1.9 miles south-west) nearby, there’s older building stock in the area around Wilmington as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to Berwick (Sussex) station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. In the older streets around St Mary and St Peter's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Wilmington is about 4 miles south-west of Hailsham, in East Sussex. From the centre of Wilmington to the outskirts, we cover sand mastic for every kind of property. 289 places in East Sussex are on our list, from the larger towns to small villages. There’s also a page for Brighton, roughly 14 miles from Wilmington.
Here we cover the BN26 postcode area for sand mastic. If you need sand mastic at a property on The Street and Ades Field or a nearby road, our applicators can take on the job. Nearby, we also carry out sand mastic in Milton Street (1 mile south-west), Winton (2 miles west), Arlington (2 miles north), Berwick (2 miles north-west) and Lullington (2 miles south-west). Further out, we also cover Eastbourne (5 miles south-east), Bexhill-on-Sea (12 miles east), Seaford (5 miles south-west), Lewes (9 miles north-west), Hailsham (4 miles north-east) and Uckfield (11 miles north).
What’s near Wilmington
Typical jobs here are in homes near The Sussex Ox pub and the streets around them. Wilmington’s nearest station is Berwick (Sussex) station, roughly 1.8 miles north-west of the centre. A little further out are Agricultural Museum (less than half a mile south) and Burlough Castle (1 mile west). Open spaces near Wilmington include Combe Hill.
Towns and villages near Wilmington
Also in Wilmington
How it works
When we arrive, we start by going over the job with you, so you know exactly what we are doing. We protect the surfaces around the joints before any work begins. The work usually takes a few hours for a single window, longer for several. Somewhere as small as Wilmington, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
How to prepare
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
- Clear the area around the work
How to get a quote
For sand mastic in Wilmington, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before we start.