West Sussex · England
External Mastic in Old Shoreham
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Old Shoreham and across West Sussex. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Hard, crazed mastic that has stopped moving
- Joints where the bead has come unstuck
- Joints with sealant missing in places
External mastic in Old Shoreham, done properly
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. If you are dealing with moss and dirt in joints with no sealant left and leaking joints around cladding and façade panels, we can put it right, on brickwork movement joints, copings & trims and façade panels alike.
External sealant needs dry, clean surfaces, so work around Old Shoreham is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Big or small, it’s backed by our 12-month guarantee in Old Shoreham and across West Sussex.
- Where
- Old Shoreham (BN43)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Keep soil, plants and ivy away from the joints
- Tell anyone working on the walls about the movement joints
- Make sure movement joints are not pointed over
- Wash walls gently around the sealant
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead over time.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
Old Shoreham questions
Do you work for landlords with property near Shoreham-By-Sea station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Does living near the coast affect external mastic in Old Shoreham?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
How long does external mastic take?
Typically it takes a few hours for a handful of joints, longer for a whole elevation. Larger jobs naturally take longer, and we’ll tell you how long to expect.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
What we do, step by step
There isn’t much for you to do on the day. Point us to the joints and we’ll get on with it. The job generally takes a few hours to a few days, depending on the length of joint and the access, including the tidy-up. Somewhere as small as Old Shoreham, access is often the only tricky part. 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.
- Every bit of old sealant and any mortar or debris is cut out.
- 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.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- For business premises, tell us about site rules or sign-in
- Let us know about parking restrictions
Getting 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 is easy.
Read more
What we are called out for in Old Shoreham
Sometimes a movement joint was filled with mortar or a rigid filler. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
The problems people usually mention when they call are:
- Movement joints with cracked, split or missing sealant
- Moss and dirt in joints with no sealant left
- Rain getting behind render or cladding at a joint
- Leaking joints around cladding and façade panels
For an older house near a landmark such as St Nicolas' Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What to look for in a quote
- Which colour the sealant will be
- Whether VAT is included
- When the joint can take water or movement
- What preparation is included
External mastic in Old Shoreham: local notes
Old Shoreham is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. With historic houses such as Portslade Manor (about 3.1 miles east) nearby, there’s older building stock in the area around Old Shoreham as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Schools such as Swiss Gardens Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. For landlords with property near Shoreham-By-Sea station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Old Shoreham is about 1 mile west of Shoreham-by-Sea, in West Sussex. Homes, rented property, offices and hotels in Old Shoreham is covered for external mastic, old or new, large or small. The work is guaranteed for a year. We cover 371 towns and villages across West Sussex. For nearby work, see our Brighton page, about 7 miles away.
Here we cover the BN43 postcode area for external mastic. Close by, we work in Shoreham-by-Sea (1 mile east), Adur (1 mile north), Kingston by Sea (2 miles east), Southwick (2 miles east) and Castle Town (3 miles north). We also work in nearby towns such as Worthing (5 miles west), Haywards Heath (14 miles north-east), Burgess Hill (11 miles north-east), Littlehampton (11 miles west), Rustington (10 miles west) and Storrington (9 miles north-west).
Near you in Old Shoreham
Typical jobs here are in homes near The Sir Robert Woodard Academy and The Amsterdam pub. For rail, the closest station is Shoreham-By-Sea station, about 0.7 miles east. Nearby you’ll also find Southlands Hospital (1.4 miles east) and Old Castle (4.6 miles west). Green spaces nearby include Lancing Ring and Adur Estuary RSPB Reserve.
What affects the quote in Old Shoreham
We quote each job individually. This is what makes a difference:
- When we can work, for business premises
- How many rooms, windows or areas are involved
- The number and length of the joints
- Whether the work is at height
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
What we need to know
Photos help, but a description is a good start. Please mention:
- Access, such as stairs, a lift or height
- The type of property
- Where the property is
- A few photos by email, if you can
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you are ready, call 0345 464 0079 or send us an email.
Towns and villages near Old Shoreham
Other services in Old Shoreham
Landlords, agents and businesses in Old Shoreham
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
Leave it or put it right?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. Older cottages and farmhouses around Old Shoreham can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why us?
- Colour picked to suit the job
- An ARBOMaster approved applicator
- Fully insured
- Quality sealants from Arbo and Everbuild
See our cost guide or customer reviews.