East Sussex · England
Sand Mastic in Upper Wellingham
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Upper Wellingham and across East Sussex. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Weathered mastic on the most exposed windows
- Mastic that needs renewing before redecorating
- Mastic round period door frames that has failed
Sand mastic in Upper Wellingham
Old sand mastic cracks, crumbles and falls out over time, leaving gaps round the window. We rake it out and renew it so the surround looks right again. Typical jobs include old cement repairs round a window that have failed and mastic dropping out of the joint, on period & listed homes, sash and case windows and tenement windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Upper Wellingham is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Big or small, it’s backed by our one-year guarantee.
- Where
- Upper Wellingham (BN8)
- Wider area
- East Sussex
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work cannot fix
We will always be straight with you, so here’s what new sealant will not do:
- Crumbling stone or brickwork round the window
- Cracked or broken glass
- Rotten sashes, sills or window boxes (a joiner’s job)
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Joints and surfaces we work on
- Timber door frames
- Tenement windows
- Brick reveals
- Sash and case windows
- Stone surrounds
- Period & listed homes
What happens if it’s left?
An open joint round the frame lets weather in. Water can get to the frame and the masonry so renewing it early protects the window. Around Upper Wellingham, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why choose Mr Mastic in Upper Wellingham
- Every job guaranteed for a year
- An ARBOMaster approved applicator
- We never seal over old sealant
- Anti-fungal silicone where joints get wet
Read what affects the cost and customer reviews.
How we quote for sand mastic
For a quick quote, just ask. The main things that affect it are:
- How much old sealant there is and how hard it is to remove
- The amount of work
- Access and height
- Mould in or behind the old joints
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first and agree the price before starting.
What to tell us for a quote
To help us quote quickly, please include:
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
- Where the property is
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you are ready, ring 0345 464 0079 or email us.
What the job involves on each surface
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We can do one window or several.
What sand mastic looks like in Upper Wellingham
Historic houses like Glyndebourne (about 2.2 miles south-east) are a reminder that the area around Upper Wellingham 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 is traditional sand mastic. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Cooksbridge station, cracked sand mastic around sash windows lets in the draughts tenants complain about. In the older streets around The Parish Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Schools such as Ringmer Community College and Sixth Form are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Upper Wellingham is about 2 miles north-east of Lewes, in East Sussex. Across the BN8 area, we can carry out sand mastic at your property. Across East Sussex, we cover 289 places, and Upper Wellingham is one of them. You can also see our page for Brighton, roughly 9 miles from Upper Wellingham.
Every address in BN8 is within our area for sand mastic, from the main roads to the quietest streets. We also cover the places around Upper Wellingham: Barcombe Mills (1 mile north), Norlington (1 mile south-east), Barcombe (1 mile north-west), Barcombe Cross (2 miles north-west) and Broyle Side (2 miles east). Larger places within reach include Eastbourne (14 miles south-east), Seaford (9 miles south), Hailsham (10 miles east), Crowborough (12 miles north-east), Uckfield (5 miles north-east) and Newhaven (8 miles south).
What’s near Upper Wellingham
We work in homes and buildings around The Cock Inn, among other places. The closest station to Upper Wellingham is Cooksbridge station, roughly 2.1 miles west. A little further out are Lewes Castle (2.6 miles south-west) and Lewes Victoria Hospital (2.8 miles south-west). The countryside around Upper Wellingham includes Malling Down and Cliffe Hill.
Questions from Upper Wellingham
I let a flat near Cooksbridge station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Is Upper Wellingham within the area you cover?
Yes. Upper Wellingham is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you replace silicone on a period window with sand mastic?
Normally, yes. With the silicone removed and the joint cleaned, sand mastic is applied by hand.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
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.
Will there be a smell?
There can be a smell while the sealant cures. Opening a window helps.
Aftercare tips
A little care helps the new joints last. We recommend:
- Renew mastic before redecorating the windows
- Keep sills and gutters clear so water drains away
- Avoid heavy scraping on the mastic joint
- Do not paint over the new mastic
Leave the new mastic unpainted, which is the traditional advice. Ask us before any decorating around it.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
What we do, step by step
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. It normally takes anything from a few hours to a full day, depending on how many windows. Somewhere as small as Upper Wellingham, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- 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.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Tell us about any water getting in
- Keep children and pets away from the work area
- For indoor joints, keep the area dry beforehand if you can
Get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Related advice
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For landlords and businesses
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured for the work.
If you manage several properties in or around Upper Wellingham, several properties can be quoted together. Send us the addresses and the work at each.