West Sussex · England
External & façade joints in Elmer, West Sussex
Movement joints in Elmer need attention? We cut out the old, prepare the joints and apply the right sealant.
- Moss and dirt in joints with no sealant left
- Joints where the bead has come unstuck
- Old sealant gone brittle and cracked
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
How we handle external mastic in Elmer
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. We work on brickwork movement joints, façade panels and copings & trims, and the jobs we see most are panel joints letting water in and sealant pulling away from one side of the joint.
Around Elmer, garages, outbuildings and extensions all add to the joints on the outside of a home. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Elmer (PO22)
- Region
- West Sussex
- Cover
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Elmer
Does living near the coast affect external mastic in Elmer?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
Will you come out to Elmer?
Yes. Elmer is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
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’ll get a clear quote before we start.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Do you use backing rod?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Do you need external mastic in Elmer?
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
Signs it’s time to call us include:
- Panel joints letting water in
- Weeds or debris growing in open joints
- Sealant pulling away from one side of the joint
- Weathered mastic that no longer stretches
Letting a property close to Ford station? Then split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- Who does the work, and how experienced they are
- Whether the sealant suits the joint
- The length of the guarantee
- What insurance they hold
What external mastic looks like in Elmer
Elmer is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as St Nicholas Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For site and facilities teams at buildings such as Bishop Tufnell CofE Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Elmer is about 3 miles east of Bognor Regis, in West Sussex. Wherever you are in the PO22 postcode area, we can carry out external mastic at your property. We cover 371 towns and villages across West Sussex, large and small. We also work in Portsmouth, about 20 miles from Elmer.
Every address in PO22 is within our area for external mastic, from the main roads to the quietest streets. That includes homes and businesses on Elmer Road, Ancton Lane and East Avenue. Neighbouring places we cover for external mastic include Middleton-on-Sea (1 mile west), Bilsham (1 mile north), Atherington (1 mile north-east), Flansham (2 miles north-west) and Horsemere Green (2 miles north-east). We also work in nearby towns such as Worthing (9 miles east), Bognor Regis (3 miles west), Chichester (8 miles north-west), Selsey (9 miles south-west), Littlehampton (4 miles east) and Shoreham-by-Sea (15 miles east).
Around Elmer
Locally, jobs take us to homes and businesses close to Felpham Community College, among other places. Elmer’s nearest station is Ford station, about 2.9 miles north-east. Other landmarks nearby include Bognor Regis Museum (3.1 miles west) and Bognor Regis War Memorial Hospital (2.9 miles west).
Work for landlords, hotels and businesses
If you manage several properties in or around Elmer, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
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.
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Tell anyone working on the walls about the movement joints
- Do not let climbing plants root in the sealant
- Deal with leaking gutters that soak the joints below
- Avoid pressure-washing directly into sealant joints
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
When something else is needed
A few problems are outside what sealant work can do:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracked brickwork or render that needs a builder or plasterer
- Structural movement, which needs a surveyor or engineer
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
What we seal
- Façade panels
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
More services for Elmer
How the visit works
When we arrive, we look over the joints with you first, so you know exactly what we’re doing. Surfaces next to the work are protected before any work begins. Most jobs take anything from a few hours to several days, depending on the building. In a smaller place like Elmer, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Mention any tricky access
- Let us know about earlier repairs to the joints
- Try not to wet indoor joints just before the visit
How to get a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work.
Read more
Surface by surface
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. Priming is done where the sealant calls for it.