East Sussex · England
External Mastic in Hadlow Down
We cover Hadlow Down for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Leaking joints around cladding and façade panels
- Brick movement joints where the sealant has split
- Hard, crazed mastic that has stopped moving
External mastic for homes and businesses in Hadlow Down
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We strip the joint back and start again. If you’re dealing with plants rooting in failed movement joints and old sealant gone brittle and cracked, we can help.
Outside joints can only be sealed when they’re dry, so work in Hadlow Down is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
We stand behind the work with a one-year guarantee.
- Location
- Hadlow Down (TN22)
- Wider area
- East Sussex
- Cover
- One year on every job
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
External mastic in Hadlow Down: local notes
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Homes close to St Mark's Church include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. Rented homes near Buxted station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Hadlow Down is about 4 miles south of Crowborough, in East Sussex. Wherever you are in the TN22 postcode area, we can carry out external mastic at your property. We cover 289 towns and villages across East Sussex, large and small. For nearby work, see our Crawley page, about 18 miles away.
Our applicators cover all of TN22 for external mastic. Whether your property is on Waghorns Lane, School Lane and St Marks Field or anywhere close by, we can help. We also cover Etchingwood (2 miles south-west), Buxted (2 miles west), Potter's Green (2 miles south-west), Blackboys (2 miles south) and Framfield (3 miles south-west). Further out, we also cover Eastbourne (15 miles south), Lewes (11 miles south-west), Hailsham (10 miles south), Crowborough (4 miles north), Uckfield (4 miles south-west) and Newhaven (15 miles south).
Local landmarks in Hadlow Down
The closest station to Hadlow Down is Buxted station, about 2.1 miles west. Nearby you will also find Crowborough War Memorial Hospital (3.8 miles north) and Tickerage Castle (2.3 miles south-west). For a walk, there’s Selwyns Wood.
Why it’s worth doing now in Hadlow Down
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly once. In a small place like Hadlow Down, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
Why book with us
- Trusted Arbo and Everbuild sealants
- Tidy, careful work
- ARBOMaster approved applicator
- A 12-month guarantee on all work
Take a look at how sealant jobs are priced or customer reviews.
What happens on the day
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the job takes a few hours for a handful of joints, longer for a whole elevation for a typical job. In a small place like Hadlow Down, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Mention if the joints have been sealed before
- Clear the area around the work
- Keep pets and children clear of the area while we work
Getting a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Advice
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Fix overflowing gutters above sealed joints
- Get split or bare joints resealed while the damage is small
- Clear growth from the base of walls and joints
- Leave the joints unpainted unless we’ve said otherwise
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
Hadlow Down: your questions answered
Can you help a landlord with a rental near Buxted 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 will send you a clear quote.
Do you cover smaller places like Hadlow Down?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you use backing rod?
That’s backing rod, a closed-cell foam. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you when we finish.
Can a movement joint be filled with mortar?
No. A mortar-filled joint cannot move, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Why is there a gap in my brick wall?
Walls move with heat, cold and moisture, so long walls have planned gaps to take that movement. It’s closed with backing rod and a flexible sealant.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Places near Hadlow Down
Other services in Hadlow Down
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Cracking across the wall rather than at a joint
- Cutting new joints into brickwork, which is building work rather than sealant work
- Rising or penetrating damp from elsewhere in the wall
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
Joints and surfaces we work on
- Concrete & block
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
What we are called out for in Hadlow Down
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
Keep an eye out for any of the following:
- Sealant pulling away from one side of the joint
- Movement joints filled with mortar instead of sealant
- Gaps where render, brick and frames meet
- Leaking joints around cladding and façade panels
If you look after a building such as St Mark's Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- Whether the sealant suits the joint
- Which colour the sealant will be
- What the quote includes, VAT included or not
- How the joint is cleaned and prepared
Landlords, agents and businesses in Hadlow Down
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Surface by surface
Cladding and façade panels
Cladding and façade panels are generally separated by sealed joints. We reseal them with a sealant suited to the panel material.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.