West Sussex · England
Westhampnett External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Westhampnett, with a one-year guarantee on every job. Call for a quick quote.
- Water getting into walls through failed joints
- Weathered mastic that no longer stretches
- Gaps where render, brick and frames meet
How we handle external mastic in Westhampnett
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the joint does not stand out. If you’re dealing with movement joints with cracked, split or missing sealant and cracked joints where brick meets render or frames, we can help, whatever the surface.
Older homes in small places like Westhampnett may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
Big or small, it’s backed by our one-year guarantee.
- Location
- Westhampnett (PO18)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Aftercare tips
To keep the joints looking good and working properly:
- Get split or bare joints resealed while the damage is small
- Keep movement joints as flexible joints, not mortar
- Tell anyone working on the walls about the movement joints
- Fix overflowing gutters above sealed joints
Do not let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Once a joint cannot move, the wall finds another way, generally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Outside joints around Westhampnett
With historic houses such as Goodwood House (about 1.6 miles north) nearby, there’s older building stock in the area around Westhampnett as well as newer homes. 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, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as The March CofE Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Letting a property close to Chichester station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Westhampnett is about 1 mile north-east of Chichester, in West Sussex. Wherever you are in the PO18 postcode area, our applicators can take on external mastic. Across West Sussex, we cover 371 places, Westhampnett among them. Portsmouth is on our list too, around 14 miles away.
Postcode districts we cover here for external mastic: PO18. Whether your property is on Hill Road, Sears Close and Hamilton Way or anywhere close by, our applicators can take on the job. Nearby, we also carry out external mastic in Maudlin (1 mile east), Shopwyke (1 mile south-east), Westerton (1 mile north-east), Portfield (1 mile south-west) and Strettington (1 mile north-east). Larger places within reach include Bognor Regis (5 miles south-east), Selsey (8 miles south), Littlehampton (10 miles east), Emsworth (8 miles west), Rustington (11 miles east) and Storrington (14 miles east).
Local landmarks in Westhampnett
We work in homes and buildings around The Coach And Horses Public House, Westbourne House School and Chichester High School For Girls and the streets around them. Westhampnett’s nearest station is Chichester station, roughly 1.7 miles south-west of the centre. Other landmarks nearby include Chichester Castle (1.2 miles south-west) and Chichester Centre (0.8 miles west). Open spaces near Westhampnett include Stoke Down and Kingley Vale National Nature Reserve.
Signs you need external mastic in Westhampnett
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
The most common problems we see are:
- Joints pointed up with cement by mistake
- Brick movement joints where the sealant has split
- Hard, crazed mastic that has stopped moving
- Panel joints letting water in
If you live in an older home near The Parish Church of St Peter, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Comparing quotes
- Whether the sealant suits the joint
- What the cure time is
- Who does the work, and how experienced they are
- Is the old sealant removed completely?
What we do, step by step
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take anything from a few hours to several days, depending on the building. Somewhere like Westhampnett 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.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Let us know about stairs, lifts or work at height
- Tell us if parking is tricky
Get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you are ready, phone 0345 464 0079 or drop us an email.
Advice
Why deal with it now?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. Where a wall is exposed, as many are in small places like Westhampnett, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
What you get with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Domestic, commercial and hotel work
- Colour picked to suit the job
- Colour agreed with you before work begins
Take a look at how sealant jobs are priced or what customers say.
Landlords, agents and businesses in Westhampnett
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Also near Westhampnett
Other services in Westhampnett
What the job involves on each surface
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.
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so the movement is taken up.
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The type of sealant required
- How many areas need sealing
- Any working-time requirements on site
- How easy the joints are to reach
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
What we need to know
When you contact us, it’s useful to know:
- Photos by email, if that is easy
- The problem you’ve noticed
- Roughly how big the job is
- Where the property is
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or email us with the details.
Westhampnett questions
Do you cover smaller places like Westhampnett?
Yes. Westhampnett 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.
Can you do external mastic in Westhampnett?
Yes. Our work covers London and the South East, and Westhampnett is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before resealing.
How long does external mastic take?
Most jobs take a few hours to a few days, depending on the length of joint and the access, including the preparation. Your quote will say how long we expect yours to take.
Do I have to be there?
Access is agreed with you when the job is booked. Indoors, that normally means someone at home.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Can new sealant go over the old?
No. We remove every bit of old sealant first.
What’s an expansion joint in brickwork?
Brickwork, render and cladding all move a little, so long walls have planned gaps to take that movement. It’s closed with backing rod and a flexible sealant.