East Sussex · England
External Mastic in Northease
Specialist external mastic for Northease: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Rain getting behind render or cladding at a joint
- Sealant pulling away from one side of the joint
- Panel joints letting water in
How we handle external mastic in Northease
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. Common call-outs are for old sealant gone brittle and cracked and failed seals between different materials, on render & cladding joints, concrete & block and joints between brick and frames.
Older homes in small places like Northease may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water generally gets in, and they need the right sealant at the right depth.
Your job is guaranteed for a year, as with all our work.
- Location
- Northease (BN7)
- Region
- East Sussex
- Cover
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Northease buildings and the weather
Historic houses like Monk's House (about 0.7 miles east) are a reminder that the area around Northease has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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 site and facilities teams at buildings such as Priory School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Letting a property close to Southease station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. Homes close to St Peter's Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Northease is about 3 miles south of Lewes, in East Sussex. Homes, rented property, offices and hotels in Northease can book us for external mastic. The work is guaranteed for a year. Our East Sussex coverage runs to 289 places, Northease among them. You can also see our page for Brighton, about 6 miles away.
Postcode districts we cover here for external mastic: BN7. We also cover Rodmell (1 mile south-east), Iford (1 mile north-west), Kingston near Lewes (2 miles north-west), Southover (2 miles north) and Cliffe (2 miles north). We also work in nearby towns such as Eastbourne (13 miles east), Seaford (6 miles south-east), Hailsham (11 miles east), Uckfield (10 miles north-east), Newhaven (4 miles south-east) and Peacehaven (3 miles south).
What’s near Northease
We work in homes and buildings around Lewes and Laughton Levels. For rail, the closest station is Southease station, roughly 1.4 miles south-east of the centre. Nearby you’ll also find Lewes Castle (2.2 miles north) and Lewes Victoria Hospital (2.4 miles north). The countryside around Northease includes Southerham Farm and Itford Hill.
More services for Northease
Can I do it myself?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
What we do, step by step
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. Once we have agreed what’s being done, the area is protected and the work begins. It normally takes anything from a few hours to several days, depending on the building. For a village or hamlet like Northease, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
- Let us know about parking restrictions
Ask for a quote
If you’re in Northease and need external mastic, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Related advice
Surface by surface
Copings and trims
A failed coping joint lets water into the top of the wall. Resealing them is a small job that protects a lot.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
When something else is needed
Sealant is not the answer to every problem, and we will tell you before we start. Sealant won’t put right:
- Render that’s blown, hollow or coming away
- Cracks in the bricks or render themselves, away from the joints
- Adding movement joints to masonry that has none
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
What we seal
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
- Façade panels
- Brickwork movement joints
- Copings & trims
Why deal with it now?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That protects surfaces like brick, render and concrete. A stiffer product can damage the joint edge as it fails. Older cottages and farmhouses around Northease can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why book with us
- Over 20 years’ experience
- A sealant colour to suit the surroundings
- Experience in homes, commercial sites and hotels
- Anti-fungal sanitary silicone in wet areas
See what affects the cost and our reviews.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Check external joints each spring
- Deal with leaking gutters that soak the joints below
- Check the sealant is paintable before painting near it
- Tell anyone working on the walls about the movement joints
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
How we quote for external mastic
The quote reflects the job in front of us. We take into account:
- Mould in or behind the old joints
- The number and length of the joints
- Working hours on commercial sites
- Whether old sealant or filler has to be cut out
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
What to tell us for a quote
When you call or email, it’s useful to know:
- The problem you’ve noticed
- If someone has resealed it before
- Photos by email, if that is easy
- Roughly how big the job is
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Common questions in Northease
Do you cover smaller places like Northease?
Yes, Northease is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Southease station?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
Can you seal joints between render and window frames?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. The colour is chosen to suit.
What is backing rod for?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding, so the joint can move.
Can you do several jobs on one visit?
Yes. Just list everything you need.
How long does the job take?
As a guide, most jobs take a few hours for a handful of joints, longer for a whole elevation. Bigger jobs take longer, and we’ll tell you how long to expect.