West Sussex · England
External & façade joints in High Cross, West Sussex
We cover High Cross for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Cracked joints where brick meets render or frames
- Old sealant gone brittle and cracked
- Sealant pulling away from one side of the joint
About our external mastic in High Cross
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. We’re often asked to deal with gaps where render, brick and frames meet and old sealant gone brittle and cracked, on concrete & block, render & cladding joints and façade panels.
In a village or hamlet like High Cross, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Whatever the size of the job, you get the same 12-month guarantee.
- Where
- High Cross (BN6)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Quotes for external mastic in High Cross
Call for a quick quote. What matters most is:
- When we can work, for business premises
- How easy the joints are to reach
- Which sealant suits the joint
- Whether there’s mould to deal with
Doing several joints on one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We’ll send you a clear quote for the lot.
Helping us quote
You don’t need to know the technical terms. It helps if you can tell us:
- What’s wrong with the joints now
- The address or postcode of the job
- Any previous sealing or DIY work
- Any access issues, like height or stairs
For external mastic in High Cross, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Questions from High Cross
Can you do external mastic in High Cross?
Yes. Our work covers London and the South East, and High Cross is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
I let a flat near Hassocks station. Can you help?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or email us with the details for a clear quote.
Are you insured?
Yes. We’re fully insured.
What colours does the sealant come in?
We choose a sealant colour to suit the brick, stone or render, so the joint sits quietly in the wall. Exterior sealants come in a good range of colours.
How often do external joints need resealing?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away, and reseal at that point.
Will there be a smell?
Possibly a little. It fades as the sealant cures.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Can I add another job to the visit?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
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 work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. In a small place like High Cross, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Getting ready for the visit
- Move anything stored near the joints
- On commercial sites, let us know about site rules
- Mention any tricky access
Getting a quote
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job, and we’ll take it from there.
Read more
Why deal with it now?
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. A flexible sealant over backing rod is what the joint needs. Around High Cross, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
What you pay reflects the work, not guesswork. That is why we ask a few questions first and agree the price before starting.
What you get with us
- Colour agreed with you before we start
- Fully insured
- Tidy, careful work
- We never seal over old sealant
Take a look at how sealant jobs are priced or what customers say.
Do you need external mastic in High Cross?
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
Most people get in touch when they notice one of these:
- Old sealant gone brittle and cracked
- Failed seals between different materials
- Failed sealant between panels on a façade
- Water getting into walls through failed joints
If you let a flat or house near Hassocks station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Questions to ask before you book
- Which sealant they’ll use, and why
- How the joint is cleaned and prepared
- What guarantee comes with the work
- Whether they seal over old material or remove it
Nearby places to High Cross
Other services in High Cross
Walls and rooflines in High Cross
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as The Parish Church of St Bartholomew, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Managing a site like Albourne CofE Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
High Cross is about 4 miles west of Burgess Hill, in West Sussex. For external mastic in and around High Cross, please call 0345 464 0079 or send us an email for a quick quote. We cover West Sussex from our Crawley base. High Cross is one of 371 towns and villages in West Sussex where we work. We also work in Brighton, about 9 miles from High Cross.
All of BN6 is covered for external mastic, from the main roads to the quietest streets. Neighbouring places we cover for external mastic include Albourne (1 mile south-east), Albourne Green (1 mile south-east), Albourne Street (1 mile south-east), Blackstone (1 mile south-west) and Twineham (2 miles north). Within a short drive, we also cover Crawley (12 miles north), Horsham (10 miles north-west), Worthing (11 miles south-west), Haywards Heath (7 miles north-east), Burgess Hill (4 miles east) and Shoreham-by-Sea (8 miles south).
Around High Cross
For rail, the closest station is Hassocks station, about 3.4 miles east of the centre. Well-known places in the area include The Dene Hospital (2.9 miles north-east) and Clayton Castle (3.9 miles south-east). Open spaces near High Cross include Wolstonbury Hill and Woods Mill.
DIY sealant or a professional job?
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.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Clear growth from the base of walls and joints
- Keep water from gutters off the wall
- Have failed joints looked at early
- Check external joints each spring
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established.