West Sussex · England
Eastergate External Mastic
External mastic across Eastergate and nearby, with old sealant always removed completely and a 12-month guarantee.
- Sealant pulling away from one side of the joint
- Old sealant gone brittle and cracked
- Failed seals between different materials
About our external mastic in Eastergate
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. Common call-outs are for failed seals between different materials and moss and dirt in joints with no sealant left, across copings & trims, façade panels and joints between brick and frames.
Somewhere as small as Eastergate, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or send us an email.
- Where
- Eastergate (PO20)
- Wider area
- West Sussex
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Signs you need external mastic in Eastergate
Using the wrong sealant is another common reason. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
If you can see any of these, it’s time to have the joints looked at:
- Moss and dirt in joints with no sealant left
- Water getting into walls through failed joints
- Movement joints filled with mortar instead of sealant
- Gaps where render, brick and frames meet
For site and facilities teams at buildings such as Eastergate CofE Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Before you book anyone
- What insurance they hold
- What product goes in the joint
- How long the guarantee is
- Who does the work, and how experienced they are
The process
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Eastergate needs a little journey planning: 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.
- 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Mention if the joints have been sealed before
- Move anything stored near the joints
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you’re ready, ring 0345 464 0079 or send us an email.
Related advice
FAQs for Eastergate
Is Eastergate within the area you cover?
Yes. Eastergate is within the area we cover, which takes in towns, villages and rural addresses. 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 work for landlords with property near Barnham station?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned.
Will there be a smell?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used before we leave.
Do I have to be there?
If the work is inside, we need someone to let us in. Once we have agreed the job, you don’t need to watch us work.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses.
What does external mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before any work starts.
Why act early in Eastergate
Sealing over the top of old mastic doesn’t hold for long. New sealant doesn’t bond well to old, weathered sealant, so we always take the old sealant out. Older cottages and farmhouses around Eastergate can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first and give you a clear price before work begins.
Why Eastergate customers choose us
- We are fully insured
- Experience in homes, commercial sites and hotels
- You choose the colour before work begins
- 12-month guarantee on every job
Read what affects the cost and our reviews.
Eastergate buildings and the weather
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Goodwood House (about 4.2 miles north-west) nearby, there’s older building stock in the area around Eastergate as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Homes close to St George's Church include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain. For landlords with property near Barnham station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Eastergate is about 4 miles north of Bognor Regis, in West Sussex. Eastergate gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Across West Sussex, we cover 371 places, and Eastergate is one of them. For nearby work, see our Portsmouth page.
Our applicators cover all of the PO20 postcode area for external mastic. Streets in the area include St Georges Walk, Highview Road and Critchmere Drive, all of which we cover. Other places close to Eastergate include Westergate (1 mile west), Nyton (1 mile west), West Barnham (1 mile south-east), Fontwell (1 mile north) and Barnham (1 mile south-east). We also work in nearby towns such as Worthing (11 miles east), Bognor Regis (4 miles south), Chichester (5 miles west), Selsey (9 miles south-west), Littlehampton (6 miles east) and Lancing (15 miles east).
What’s near Eastergate
Locally, jobs take us to homes and businesses close to Ormiston Six Villages Academy and the streets around them. For rail, the closest station is Barnham station, roughly 1 mile south-east. Well-known places in the area include Bognor Regis War Memorial Hospital (3.4 miles south) and Tote Copse Castle (1.5 miles west). Green spaces nearby include WWT Arundel.
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Cracked brickwork or render that needs a builder or plasterer
- Adding movement joints to masonry that has none
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer before booking.
Where we work in Eastergate
- Copings & trims
- Brickwork movement joints
- Façade panels
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
What affects the quote in Eastergate
For a quick quote, just ask. The main things that affect it are:
- The type of sealant required
- The size of the job
- Mould in or behind the old joints
- The old material and how stubborn it is
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 we need extra access for height. We take all of that into account in your quote.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- The rough size of the job
- Pictures of the joints, sent by email
- How we’d reach the joints
- The type of property
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will take it from there.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Act on the first splits you see
- Make sure movement joints aren’t pointed over
- Tell anyone working on the walls about the movement joints
- Walk round the building once a year and look at the joints
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
Towns and villages near Eastergate
More services for Eastergate
Different surfaces, different methods
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.