West Sussex · England
South Ambersham External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for householders, landlords and businesses in South Ambersham. Fully insured, ARBOMaster approved and guaranteed for a year.
- Sealant that has lost its bond to the brick or render
- Joints with sealant missing in places
- Failed sealant between panels on a façade
South Ambersham: your questions answered
What guarantee comes with external mastic in South Ambersham?
Every job comes with our one-year guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Can you do external mastic in South Ambersham?
Yes, South Ambersham is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
When will the joints need doing again?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few pictures.
How long does external mastic take?
It depends on the size of the job, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We will give you a better idea when we quote.
How long before the joint can be used?
It depends on the product and the temperature. We tell you how long to leave it before we go.
Can landlords and businesses book you?
Yes, we do. Domestic, commercial and hotel work are all part of what we do, and we are fully insured.
Should I point up the gap in my brickwork?
No. Rigid materials can’t move with the wall. If it has already been filled, we can generally cut it out and reseal it.
How we handle external mastic in South Ambersham
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We strip the joint back and start again. If you have sealant pulling away from one side of the joint and weathered mastic that no longer stretches, we can help, on concrete & block, render & cladding joints and façade panels alike.
In a village or hamlet like South Ambersham, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- South Ambersham (GU29)
- Region
- West Sussex
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Quotes for external mastic in South Ambersham
Every job gets its own quote. These are the things that affect it:
- How many rooms, windows or areas are involved
- Access and height
- The product the joint needs
- Mould in or behind the old joints
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Call for a quick quote and we will go through it with you.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- How we’d reach the joints
- What’s wrong with the joints now
- Where the job is, and your postcode
- The type of property
Need a quote? Please call 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.
Different surfaces, different methods
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best in all weathers.
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. A primer goes on where the product requires one before sealing.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Fix overflowing gutters above sealed joints
- Keep movement joints as flexible joints, not mortar
- Walk round the building once a year and look at the joints
- Check the sealant is paintable before painting near it
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
What external mastic looks like in South Ambersham
Historic houses like Cowdray House (about 1.7 miles north-west) are a reminder that the area around South Ambersham has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Midhurst Rother College? Then larger buildings have long runs of movement joint that eventually need resealing.
South Ambersham is about 10 miles north of Chichester, in West Sussex. Homes, rented property, offices and hotels in South Ambersham can book us for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. South Ambersham is one of 371 towns and villages in West Sussex where we work for external mastic. For nearby work, see our Portsmouth page (20 miles or so).
Our applicators cover all of the GU29 postcode area for external mastic. Close by, we work in Selham (1 mile east), Graffham (2 miles south), River (2 miles north-east), Upperton (3 miles north-east) and Tillington (3 miles east). We also work in nearby towns such as Bognor Regis (13 miles south), Chichester (10 miles south), Littlehampton (14 miles south-east), Emsworth (14 miles south-west), Rustington (14 miles south-east) and Storrington (11 miles east).
Near you in South Ambersham
Well-known places in the area include Midhurst Community Hospital (2 miles north-west) and Lodsworth Castle (1.1 miles east). Open spaces near South Ambersham include Graffham Common and Levin Down.
Nearby places to South Ambersham
Also in South Ambersham
Landlords, agents and businesses in South Ambersham
For anyone letting property in or around South Ambersham, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
What sealant work can’t fix
A few problems are outside what sealant work can do:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Walls that need new movement joints cut into them
- Render that is blown, hollow or coming away
If you’re not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
Where we work in South Ambersham
- Joints between brick and frames
- Brickwork movement joints
- Façade panels
- Concrete & block
- Copings & trims
- Render & cladding joints
The process
You do not need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the job takes a few hours to a few days, depending on the length of joint and the access in most cases. In a small place like South Ambersham, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- 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.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
Get a quote
For external mastic in South Ambersham, phone 0345 464 0079 or email us. Tell us what the problem is and where, and we will agree the price before any work begins.
Advice
Do you need external mastic in South Ambersham?
Some movement joints have been pointed up with mortar. The joint cannot move, so the wall cracks somewhere else instead.
These are the problems we are asked about most:
- Movement joints filled with mortar instead of sealant
- Moss and dirt in joints with no sealant left
- Panel joints letting water in
- Cracked joints where brick meets render or frames
If you live in an older home near Church of St James, an extension built onto an older house moves differently, and the joint between them takes the strain.
Questions to ask before booking
- Are they insured?
- What guarantee comes with the work
- What happens if the job turns out different
- How the surfaces are prepared before sealing