East Sussex · England
Jarvis Brook External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for householders, landlords and businesses in Jarvis Brook. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Sealant pulling away from one side of the joint
- Old sealant gone brittle and cracked
- Joints pointed up with cement by mistake
About our external mastic in Jarvis Brook
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. We work on copings & trims, brickwork movement joints and render & cladding joints, and common reasons people get in touch are rain getting behind render or cladding at a joint and failed seals between different materials.
In a village or hamlet like Jarvis Brook, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
All of our work is guaranteed for twelve months.
- Where
- Jarvis Brook (TN6)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
If you manage several properties in or around Jarvis Brook, several properties can be quoted together. Just tell us the addresses and what each one needs.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Outside joints around Jarvis Brook
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. With historic houses such as Groombridge Place (about 4.7 miles north) nearby, there’s older building stock in the area around Jarvis Brook 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.
In the older streets around St Michael & All Angels, the joints between older walls, newer extensions and the roofline need a sealant that can move. If you let a flat or house near Crowborough station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Jarvis Brook is about 1 mile east of Crowborough, in East Sussex. We carry out external mastic for householders, landlords and businesses in Jarvis Brook and the surrounding area, as part of our work across East Sussex. Our East Sussex coverage runs to 289 places, Jarvis Brook among them. We also work in Crawley, about 17 miles from Jarvis Brook.
Every address in TN6 is within our area for external mastic. If you need external mastic at a property on Western Road, Tubwell Lane and Osborne Road or a nearby road, we can help. Nearby, we also carry out external mastic in Crowborough (1 mile west), Steel Cross (1 mile north), Boarshead (1 mile north), Sweethaws (2 miles south-west) and Marden's Hill (3 miles north-west). Within a short drive, we also cover Lewes (14 miles south-west), Hailsham (13 miles south), Uckfield (7 miles south-west), South Malling (14 miles south-west), Heathfield (6 miles south-east) and Southover (15 miles south-west).
Landmarks near Jarvis Brook
We work in homes and buildings around Beacon Academy. There’s a railway station in Jarvis Brook itself: Crowborough station. Well-known places in the area include Crowborough War Memorial Hospital (1.3 miles west). The countryside around Jarvis Brook includes Crowborough Country Park.
Jarvis Brook: your questions answered
Can you help a landlord with a rental near Crowborough station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
Is Jarvis Brook within the area you cover?
Yes. Jarvis Brook 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.
Do you use backing rod?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back, so the joint can move.
Is it OK to seal over old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
How long does the job take?
A typical job takes anything from a few hours to several days, depending on the building, including the preparation. Your quote will say how long we expect yours to take.
When will the joints need doing again?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
How much does external mastic cost in Jarvis Brook?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
Honest limits
Before booking, it’s worth knowing the limits:
- Render that’s blown, hollow or coming away
- Cracks in the bricks or render themselves, away from the joints
- Rising or penetrating damp from elsewhere in the wall
If you are not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer.
Where we work in Jarvis Brook
- Concrete & block
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Façade panels
Quotes for external mastic in Jarvis Brook
Every job gets its own quote. These are the things that affect it:
- Any working-time requirements on site
- The number of rooms or windows
- Any mould that needs treating
- How easy the joints are to reach
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Helping us quote
When you call or email, it’s useful to know:
- Photos by email, if that’s easy
- How many joints, rooms or windows are involved
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Places near Jarvis Brook
More services for Jarvis Brook
What the job involves on each surface
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. Priming is done where the sealant calls for it.
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.
The process
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the building. For a village or hamlet like Jarvis Brook, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
- Let us know about parking restrictions
How to get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and send you a clear quote before any work starts.
Advice
Do you need external mastic in Jarvis Brook?
Sometimes a movement joint was filled with mortar or a rigid filler by mistake. The joint can’t move, so the wall cracks somewhere else instead.
Look out for these signs:
- Weathered mastic that no longer stretches
- Sealant that has lost its bond to the brick or render
- Failed seals between different materials
- Panel joints letting water in
Schools such as Jarvis Brook Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Before you book anyone
- The length of the guarantee
- Are they insured?
- Whether they seal over old material or remove it
- Who does the work, and how experienced they are