Kent · England
External & façade joints in Castle Hill, Kent
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Castle Hill. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Failed seals between different materials
- Damp patches traced to an open external joint
- Plants rooting in failed movement joints
External mastic in Castle Hill, done properly
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. If you’re dealing with joints with sealant missing in places and joints pointed up with cement by mistake, we can put it right, whatever the surface.
Around Castle Hill, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water normally gets in.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Place
- Castle Hill (TN12)
- Region
- Kent
- Cover
- One year on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Castle Hill questions
Will you come out to Castle Hill?
Yes, Castle Hill is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Paddock Wood station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We will tell you what we are using and why.
Where are you based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
What we do, step by step
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours for a handful of joints, longer for a whole elevation and we leave things clean and tidy. Somewhere like Castle Hill needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
- Tell us about any previous sealing or DIY attempts
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Related advice
Surface by surface
Cladding and façade panels
If the façade has a specified sealant, that’s what we use. Send us any details you have about the façade.
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
What we are called out for in Castle Hill
Buildings move more than people expect. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
If you can see any of these, it’s time to have the joints looked at:
- Movement joints with cracked, split or missing sealant
- Rigid filler in a joint that should flex
- Failed sealant between panels on a façade
- Hard, crazed mastic that has stopped moving
If you let a flat or house near Paddock Wood station, outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- Who turns up on the day
- What guarantee comes with the work
- Whether VAT is included
- Whether they’re fully insured
External mastic in Castle Hill: local notes
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. With historic houses such as Scotney Castle (about 4.3 miles south) nearby, there’s older building stock in the area around Castle Hill as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Managing a site like Brenchley and Matfield Church of England Primary School? Then larger buildings have long runs of movement joint that eventually need resealing. For an older house near a landmark such as Parish Church of All Saints, an extension built onto an older house moves differently, and the joint between them takes the strain.
Castle Hill is about 7 miles east of Royal Tunbridge Wells, in Kent. From the centre of Castle Hill to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Castle Hill is one of 922 places in Kent where we work for external mastic. There’s also a page for Crawley, about 26 miles away.
Our applicators cover all of the TN12 postcode area for external mastic and the streets around it. That includes homes and businesses on Crook Road and Pearson's Green Road. Nearby, we also carry out external mastic in Palmer's Green (1 mile south-west), Pearson's Green (1 mile north-east), Mile Oak (1 mile north-west), Horsmonden (1 mile south-east) and Hazel Street (2 miles south). Within a short drive, we also cover Maidstone (9 miles north-east), Sevenoaks (13 miles north-west), Royal Tunbridge Wells (7 miles west), Tonbridge (7 miles north-west), Kings Hill (8 miles north) and Foley Park (10 miles north-east).
What’s near Castle Hill
Locally, jobs take us to homes and businesses close to The Castle Inn and Mascalls School, among other places. The closest station to Castle Hill is Paddock Wood station, roughly 2.2 miles north-west. Well-known places in the area include The Hop Farm Museum (3 miles north) and Tunbridge Wells Hospital (4.7 miles west). The countryside around Castle Hill includes Tudeley Woods RSPB reserve.
Also near Castle Hill
What else we do in Castle Hill
Quotes for external mastic in Castle Hill
Your quote is based on your job. We take into account:
- How many rooms, windows or areas are involved
- When we can work, for business premises
- How much there is to do
- Access and height
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
What we need to know
You don’t need to know the technical terms. It helps if you can tell us:
- What’s wrong with the joints now
- If someone has resealed it before
- The address or postcode of the job
- How we’d reach the joints
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
For landlords 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 go on one quote.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Looking after it afterwards
Aftercare is simple:
- Tell anyone working on the walls about the movement joints
- Act on the first splits you see
- Wash walls gently around the sealant
- Fix overflowing gutters above sealed joints
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
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.