West Sussex · England
External Mastic in Hambrook
We cover Hambrook for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Water getting into walls through failed joints
- Cracked joints where brick meets render or frames
- Rigid filler in a joint that should flex
Signs you need external mastic in Hambrook
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Any of these means the joints need attention:
- Old sealant gone brittle and cracked
- Brick movement joints where the sealant has split
- Joints where the bead has come unstuck
- Movement joints filled with mortar instead of sealant
Managing a site like Chidham Parochial Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- What the quote includes, VAT included or not
- What product goes in the joint
- Who turns up on the day
- Whether you can choose the colour
How we handle external mastic in Hambrook
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the line blends in. Typical jobs include weeds or debris growing in open joints and joints with sealant missing in places, on façade panels, joints between brick and frames and render & cladding joints.
Around Hambrook, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
Big or small, you get the same one-year guarantee.
- Location
- Hambrook (PO18)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Walls and rooflines in Hambrook
Hambrook is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to St Wilfrid's Church and Hall include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. For landlords with property near Nutbourne station, outside joints that have cracked can let damp into a rental, so check them between lets.
Hambrook is about 5 miles west of Chichester, in West Sussex. Jobs in Hambrook get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 371 towns and villages across West Sussex. Portsmouth is on our list too, around 9 miles away.
We cover every part of PO18 for external mastic. Streets in the area include Kingfisher Close, Dragonfly Grove and Pipistrelle Way. Neighbouring places we cover for external mastic include Nutbourne (1 mile south), Funtington (1 mile north-east), West Ashling (1 mile east), Chidham (1 mile south) and Racton (2 miles north). Within a short drive, we also cover Bognor Regis (10 miles south-east), Chichester (5 miles east), Selsey (9 miles south-east), Emsworth (3 miles west), Portfield (5 miles east) and Yapton (12 miles east).
Around Hambrook
Around Hambrook, our work takes us to homes and buildings near Bourne Community College, among other places. For rail, the closest station is Nutbourne station, about 0.6 miles south. A little further out are Havant War Memorial Hospital (4.7 miles west) and Emsworth Museum (2.5 miles west). For a walk, there’s Nutborne Marshes and Stoke Down.
The process
We keep the work tidy and contained to the joints we’re treating. The job generally takes a few hours for a handful of joints, longer for a whole elevation, and we tell you how long to leave it before we go. In a small place like Hambrook, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- 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
- Move anything stored near the joints
- Mention any sign-in or site rules at work premises
- Let us know about earlier repairs to the joints
Ask for a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or email us.
Related advice
Also near Hambrook
What else we do in Hambrook
How the job changes by surface
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joints work hard every day. The sealant is chosen with that in mind.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
How we quote for external mastic
Every job gets its own quote. This is what makes a difference:
- When we can work, for business premises
- Access and height
- The type of sealant required
- How much old sealant there is and how hard it is to remove
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we will explain what it covers.
What to tell us for a quote
To make quoting easier, let us know:
- If it’s domestic, commercial or a hotel
- How many joints, rooms or windows are involved
- The problem you’ve noticed
- Where the property is
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or send us an email with the details and send pictures if you have them.
DIY sealant or a professional job?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Check external joints each spring
- Fix overflowing gutters above sealed joints
- Get split or bare joints resealed while the damage is small
- Keep high-pressure jets off the joints
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
Hambrook: your questions answered
Do you cover smaller places like Hambrook?
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.
Does living near the coast affect external mastic in Hambrook?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
Is there any odour?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status.
How long will you be here?
A typical job takes a few hours to a few days, depending on the length of joint and the access, including preparation and clearing up. Your quote will say how long we expect yours to take.
What information do you need?
A short description and the location. We will ask anything else we need to know.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Does someone need to be in?
Access is agreed with you when the job is booked. Indoors, that generally means someone at home.
What sealant work cannot fix
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Walls that need new movement joints cut into them
- Movement that is more than a sealant joint can take
- Cracking across the wall rather than at a joint
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
Where we work in Hambrook
- Render & cladding joints
- Façade panels
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames