East Sussex · England
External Mastic in Ashburnham
Specialist external mastic for Ashburnham: careful preparation, the right product and tidy work. Call for a quick quote.
- Water getting into walls through failed joints
- Sealant pulling away from one side of the joint
- Rigid filler in a joint that should flex
Ashburnham questions
I let a flat near Battle station. Can you help?
Yes. We work for landlords and agents as well as homeowners. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover smaller places like Ashburnham?
Yes. Ashburnham is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you guarantee your work?
Yes, always. Each job is guaranteed for twelve months, large or small.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. Indoors, that generally means someone at home.
Do you work at height?
Each building is different. Send us photos and a rough idea of the height, and we’ll confirm what access is needed.
How often do external joints need resealing?
It varies with how exposed the wall is and how much the joint moves. Look for splits, hardening or edges coming away.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
External mastic for homes and businesses in Ashburnham
For buildings in Ashburnham, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. We work on render & cladding joints, brickwork movement joints and façade panels, and the jobs we see most are sealant pulling away from one side of the joint and water getting into walls through failed joints.
Somewhere as small as Ashburnham, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Ashburnham (TN33)
- Region
- East Sussex
- Cover
- One year on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
How we quote for external mastic
Every job gets its own quote. This is what makes a difference:
- How easy the joints are to reach
- How many rooms, windows or areas are involved
- The size of the job
- The old material and how stubborn it is
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
What to tell us for a quote
Before you ask for a quote, have a think about:
- If someone has resealed it before
- Where the property is
- Photos by email, if that’s easy
- Whether it’s a home or a business
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details and send pictures if you have them.
Work for landlords, hotels and businesses
If you manage several properties in or around Ashburnham, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Walls and rooflines in Ashburnham
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For landlords with property near Battle station, outside joints that have cracked can let damp into a rental, so check them between lets.
Ashburnham is about 5 miles north-west of Bexhill-on-Sea, in East Sussex. Homes, rented property, offices and hotels in Ashburnham can book us for external mastic. The work is guaranteed for a year. Ashburnham is one of 289 places in East Sussex we cover. You can also see our page for Brighton, roughly 24 miles from Ashburnham.
Work in TN33 is quoted and booked the same way as anywhere else. If you need external mastic at a property on Church Road and The Forge or anywhere close by, we can help. Neighbouring places we cover for external mastic include Brownbread Street (1 mile west), The Pound (1 mile south), Bodle Street Green (2 miles west), Wood's Corner (3 miles north-west) and Dallington (3 miles north-west). Within a short drive, we also cover Eastbourne (10 miles south-west), Hastings (8 miles east), Bexhill-on-Sea (5 miles south-east), Hailsham (7 miles south-west), Crowborough (14 miles north-west) and St Leonards (8 miles south-east).
Local landmarks in Ashburnham
Typical jobs here are in homes near Ashburnham Park and The Ash Tree Inn and the streets around them. The closest station to Ashburnham is Battle station, about 4.4 miles east. Nearby you will also find Old Castle (3.1 miles north-west) and Battle Museum of Local History (3.9 miles east). Green spaces nearby include Senlac Hill.
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Deal with leaking gutters that soak the joints below
- Show decorators and builders where the movement joints are
- Ask before painting over external sealant
- Make sure movement joints aren’t pointed over
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Act while the splits are small. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
How the visit works
When we arrive, we start by going over the job with you, so you know exactly what we’re doing. We protect the surfaces around the joints before work begins. The work usually takes anything from a few hours to several days, depending on the building. Somewhere as small as Ashburnham, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Tell us about any water getting in
- Clear items away from the joints we’re working on
Get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you are ready, ring 0345 464 0079 or send us an email.
Advice
Different surfaces, different methods
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. The sealant is chosen with that in mind.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that is happened, we rake it out and reseal it properly where it can be done safely.
Also near Ashburnham
Other services in Ashburnham
When to call us in Ashburnham
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and make things worse.
The most common problems we see are:
- Weathered mastic that no longer stretches
- Water getting into walls through failed joints
- Panel joints letting water in
- Cracked joints where brick meets render or frames
In the older streets around Parish Church of St Peter, an extension built onto an older house moves differently, and the joint between them takes the strain.
What to look for in a quote
- What preparation is included
- The length of the guarantee
- When the joint can take water or movement
- Who turns up on the day