East Sussex · England
South Malling External Mastic
Professional external mastic in and around South Malling, with every bit of old sealant taken out first and a 12-month guarantee.
- Damp patches traced to an open external joint
- Cracked joints where brick meets render or frames
- Panel joints letting water in
What affects the quote in South Malling
Some jobs are bigger than they look, and some smaller. The main factors:
- How easy the joints are to reach
- Any mould that needs treating
- How many areas need sealing
- The size of the job
What it costs depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before work begins, so you know where you stand.
Helping us quote
You do not need to know the technical terms. Just tell us:
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
- Photos by email, if that is easy
- If someone has resealed it before
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, phone 0345 464 0079 or send us an email.
External mastic in South Malling, done properly
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two. We work on render & cladding joints, joints between brick and frames and brickwork movement joints, and common reasons people get in touch are joints pointed up with cement by mistake and damp patches traced to an open external joint.
Homes around South Malling range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
A one-year guarantee comes as standard.
- Location
- South Malling (BN7, BN8)
- Region
- East Sussex
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What else we do in South Malling
Signs you need external mastic in South Malling
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
These are the problems we are asked about most:
- Panel joints letting water in
- Brick movement joints where the sealant has split
- Gaps where render, brick and frames meet
- Sealant pulling away from one side of the joint
If you let a flat or house near Lewes station, split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- Whether all the old sealant comes out first
- How the colour is chosen
- How much experience the applicator has
- What guarantee comes with the work
How it works
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours to a few days, depending on the length of joint and the access. In a smaller place like South Malling, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Mention any tricky access
- Mention any sign-in or site rules at work premises
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
We do not publish a price list. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or drop us an email.
Advice
Walls and rooflines in South Malling
With historic houses such as Anne of Cleves House (about 0.8 miles south-west) nearby, there’s older building stock in the area around South Malling as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. 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.
For an older house near a landmark such as Church of St Michael, old and new materials meet at the roofline and walls, which is where sealant earns its keep. If you look after a building such as South Malling CofE Primary and Nursery School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
South Malling is about 1 mile north-east of Lewes, in East Sussex. If you need external mastic in South Malling, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover East Sussex from our Crawley base. South Malling is one of 289 towns and villages in East Sussex we cover for external mastic. There’s also a page for Brighton, roughly 7 miles from South Malling.
Every address in BN7 and BN8 is within our area for external mastic, from the main roads to the quietest streets. You will find streets such as Lee Road, New Road and Mill Road, and we cover them all. South Malling sits on or near the A26 and A2029. If you are just outside South Malling, we cover Lewes (1 mile south-west), Cliffe (1 mile south-east), Southover (1 mile south), Hamsey (1 mile north) and Offham (1 mile north-west). We also work in nearby towns such as Eastbourne (14 miles south-east), Seaford (8 miles south-east), Hailsham (11 miles east), Crowborough (14 miles north-east), Uckfield (7 miles north-east) and Newhaven (6 miles south).
Local landmarks in South Malling
Locally, jobs take us to homes and businesses close to Elephant and Castle pub, Priory School and Railway Land, among other places. The nearest railway station is Lewes station, roughly 0.7 miles south of the centre. A little further out are Lewes Victoria Hospital (0.8 miles south-west) and Lewes Castle (0.5 miles south-west). Green spaces nearby include Malling Down and Cliffe Hill.
Why act early in South Malling
Water gets in through a failed movement joint and can run behind render or cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. Homes in smaller places like South Malling can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
What you get with us
- A choice of colours where the product allows
- A 12-month guarantee on all work
- We’re fully insured
- Quality sealants from Arbo and Everbuild
Take a look at what affects the cost and customer reviews.
Should I try it myself first?
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.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
South Malling: your questions answered
Is South Malling within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you cover South Malling for external mastic?
Yes, South Malling is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first.
Is there a guarantee?
Yes. Every job comes with a 12-month guarantee.
What’s an expansion joint in brickwork?
A vertical gap in a long brick wall is usually a movement joint. It gives the wall room to move, and it should be sealed with a flexible sealant.
How often do external joints need resealing?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and renew it when it starts to fail.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
What we can’t put right
Some problems need a builder, plumber or other trade rather than us:
- Walls that need new movement joints cut into them
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Failed render or damaged cladding panels
If you’re not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
What we seal
- Render & cladding joints
- Façade panels
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block