West Sussex · England
External & façade joints in Plummers Plain, West Sussex
Specialist external mastic for Plummers Plain: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Gaps where render, brick and frames meet
- Panel joints letting water in
- Plants rooting in failed movement joints
How we handle external mastic in Plummers Plain
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a matching colour. Common call-outs are for failed seals between different materials and old sealant gone brittle and cracked, on concrete & block, brickwork movement joints and copings & trims.
External sealant needs dry, clean surfaces, so work around Plummers Plain is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- Plummers Plain (RH13)
- Wider area
- West Sussex
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How the job changes by surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant where it can be done safely.
Nearby places to Plummers Plain
What else we do in Plummers Plain
How to look after the new joints
Good habits help new joints last longer. A few tips:
- Keep high-pressure jets off the joints
- Tell anyone working on the walls about the movement joints
- Keep water from gutters off the wall
- Check external joints each spring
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead and let water in behind.
Act while the splits are small. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
DIY versus a professional finish
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.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Landlord and commercial work in Plummers Plain
We also work for property managers and facilities teams. Several sites can go on one quote.
For anyone letting property in or around Plummers Plain, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
The process
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and tidy away. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere like Plummers Plain 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 inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Let us know if you’ve seen damp or leaks
- Tell us if parking is tricky
- Move anything stored near the joints
Getting a quote
We quote each job on its own. Just phone 0345 464 0079 or drop us an email with the details, and photos are welcome.
Advice
When to call us in Plummers Plain
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
If you can see any of these, it’s time to have the joints looked at:
- Movement joints filled with mortar instead of sealant
- Failed sealant between panels on a façade
- Movement joints with cracked, split or missing sealant
- Cracked joints where brick meets render or frames
If you live in an older home near St Mary's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Before you book anyone
- What happens if the job turns out different
- Which sealant they’ll use, and why
- How the joint is cleaned and prepared
- Whether you can choose the colour
What external mastic looks like in Plummers Plain
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. Historic houses like Tyes Place (about 2.9 miles east) are a reminder that the area around Plummers Plain 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.
For site and facilities teams at buildings such as Newells Preparatory School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. If you let a flat or house near Faygate station, split movement joints are easy to miss on a rental until damp shows inside.
Plummers Plain is about 4 miles east of Horsham, in West Sussex. From the centre of Plummers Plain to the outskirts, we cover external mastic for every kind of property. Plummers Plain is one of 371 towns and villages in West Sussex we cover.
All of RH13 is covered for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on Handford Way, Handcross Road and Hammerpond Road or a nearby road, we can help. Neighbouring places we cover for external mastic include Slaugham (1 mile east), Lower Beeding (1 mile south-west), Handcross (2 miles north-east), Mannings Heath (2 miles west) and Crabtree (2 miles south-west). Further out, we also cover Crawley (5 miles north-east), Horsham (4 miles west), Haywards Heath (7 miles south-east), Burgess Hill (8 miles south-east), East Grinstead (11 miles north-east) and Shoreham-by-Sea (14 miles south).
Local landmarks in Plummers Plain
Typical jobs here are in homes near The Wheatsheaf pub, among other places. The closest station to Plummers Plain is Faygate station, about 3.8 miles north. Nearby you will also find Horsham Hospital (4.4 miles north-west). The countryside around Plummers Plain includes Tilgate Lake and Warnham LNR.
Plummers Plain: your questions answered
Can you help a landlord with a rental near Faygate station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover smaller places like Plummers Plain?
Yes. Plummers Plain 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 the sealants smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
When will the joints need doing again?
It varies with how exposed the wall is and how much the joint moves. Look for splits, hardening or edges coming away, and reseal at that point.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
Why is there a gap in my brick wall?
Most straight vertical gaps in brickwork are movement joints. It lets the bricks expand without cracking and needs a flexible seal, not mortar.
What is backing rod for?
We fit closed-cell backing rod wherever the joint depth needs controlling. It controls the depth and stops the sealant bonding to the back so the bead can stretch.
Should I point up the gap in my brickwork?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Quotes for external mastic in Plummers Plain
Your quote is based on your job. We look at:
- Any mould that needs treating
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
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 the work is at height. We take all of that into account in your quote.
Helping us quote
To help us quote quickly, let us know:
- A few pictures by email, if you can
- Whether it’s a home or a business
- If someone has resealed it before
- The address or postcode of the job
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or send us an email.