West Sussex · England
Emsworth External Mastic
External mastic for Emsworth, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Rigid filler in a joint that should flex
- Plants rooting in failed movement joints
- Failed sealant between panels on a façade
External mastic in Emsworth
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where mortar or filler would crack. If you have rain getting behind render or cladding at a joint and moss and dirt in joints with no sealant left, we can put it right, whatever the surface.
Houses in smaller places like Emsworth can stand more in the open than those in a built-up town, so exposed walls and rooflines take more wind-driven rain. Joints on those sides are normally the first to go.
Whatever the size of the job, you get the same one-year guarantee in Emsworth and across West Sussex.
- Where
- Emsworth (PO10)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Walls and rooflines in Emsworth
Emsworth 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. Historic houses like Warblington Castle (about 1.3 miles west) are a reminder that the area around Emsworth has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
If you look after a building such as St James Church of England Controlled Primary School, its movement joints, gutters and trims need looking after like any other building’s. Letting a property close to Emsworth station? Then split movement joints are easy to miss on a rental until damp shows inside.
Emsworth is about 2 miles east of Havant, in West Sussex. We carry out external mastic for householders, landlords and businesses in Emsworth and the surrounding area, as part of our work across West Sussex. Emsworth is one of 371 places in West Sussex we cover for external mastic. Our Portsmouth page covers work nearby.
Jobs for external mastic in PO10 is quoted and booked the same way as anywhere else. Whether your property is on High Street, Beacon Square and Seagull Lane or a nearby road, we can help. With the A27 and A259 close by, Emsworth is easy for our applicators to reach. Other places close to Emsworth include Lumley (1 mile east), Westbourne (1 mile north-east), Denvilles (1 mile west), Southbourne (1 mile east) and Warblington (2 miles south-west). Within a short drive, we also cover Bognor Regis (12 miles east), Chichester (7 miles east), Selsey (10 miles south-east), Portfield (8 miles east), Yapton (14 miles east) and East Wittering (7 miles south-east).
Local landmarks in Emsworth
Typical jobs here are in homes near The Kings Arms, Eames Farm and Bourne Community College, among other places. Emsworth has its own railway station: Emsworth station. Well-known places in the area include Havant War Memorial Hospital (2.2 miles west) and Emsworth Museum (under half a mile south). Not far away are Brook Meadow (Emsworth).
Common questions in Emsworth
Do you work for landlords with property near Emsworth station?
Yes. We work for landlords and agents as well as homeowners. You can call 0345 464 0079 or email us with the details for a clear quote.
Will you come out to Emsworth?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
What information do you need?
Let us know what needs doing and where, plus photos if you have them. If we need more, we will ask.
Why is there a gap in my brick wall?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Will there be a smell?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
Landlords, agents and businesses in Emsworth
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Avoid pressure-washing directly into sealant joints
- Make sure movement joints are not pointed over
- Get split or bare joints resealed while the damage is small
- Do not let climbing plants root in the sealant
Only paint over the joint if we have confirmed the sealant can take paint. Many exterior sealants aren’t designed to be painted.
A joint that has stopped moving pushes the movement elsewhere, usually as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
How we quote for external mastic
We don’t publish a price list. What we look at:
- Whether old sealant or filler has to be cut out
- Access and height
- Any working-time requirements on site
- The size of the job
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Whether it has been sealed before
- How many joints, rooms or windows are involved
- Photos by email, if that’s easy
- What the problem is, such as mould, gaps, leaks or cracking
We don’t publish a price list. Instead, we give you a clear quote for your job. To get started, phone 0345 464 0079 or send us an email.
Signs you need external mastic in Emsworth
If plants are growing out of a joint, the sealant has normally failed or was never there. Dirt and roots then trap moisture in the joint and speed up the damage.
Keep an eye out for these signs:
- Damp patches traced to an open external joint
- Cracked joints where brick meets render or frames
- Movement joints filled with mortar instead of sealant
- Movement joints with cracked, split or missing sealant
If you live in an older home near Church of St James, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What to look for in a quote
- Is the old sealant removed completely?
- How hidden problems are handled
- What product goes in the joint
- How long to leave it before use
What we do, step by step
The work is kept neat and contained to the area we’re working on. The job usually takes anything from a few hours to several days, depending on the building. A visit to Emsworth is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Let us know about parking restrictions
- Clear items away from the joints we are working on
- Keep children and pets away from the work area
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that’s easy.
Read more
Nearby places to Emsworth
Other services in Emsworth
Different surfaces, different methods
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.