West Sussex · England
Balls Cross External Mastic
External mastic across Balls Cross and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Damp patches traced to an open external joint
- Hard, crazed mastic that has stopped moving
- Sealant that has lost its bond to the brick or render
How we handle external mastic in Balls Cross
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. If you’re dealing with leaking joints around cladding and façade panels and joints with sealant missing in places, we can put it right, on joints between brick and frames, brickwork movement joints and façade panels alike.
In a village or hamlet like Balls 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.
You get a one-year guarantee, the same in Balls Cross as everywhere else we work.
- Where
- Balls Cross (GU28)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
The process
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes anything from a few hours to several days, depending on the building, depending on how much there is to do. For a village or hamlet like Balls Cross, the journey is planned in advance: let us know about lanes, gates and parking. 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.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Move anything stored near the joints
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
Getting a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Related advice
Balls Cross questions
Can you do external mastic in Balls Cross?
Yes, Balls Cross is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
What guarantee comes with external mastic in Balls Cross?
Every job comes with our 12-month guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or send us an email.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
What is backing rod for?
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.
Is it OK to fill a movement joint with cement?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
What affects the quote in Balls Cross
We don’t publish a price list, because jobs vary so much. The quote depends on:
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
- Whether the work is at height
- The number and length of the joints
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- The problem you’ve noticed
- Any access issues, like height or stairs
- Photos by email, if that is easy
- If it’s domestic, commercial or a hotel
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you’re ready, ring 0345 464 0079 or send us an email.
Also near Balls Cross
What else we do in Balls Cross
What the job involves on each surface
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. We prime where the product needs it.
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.
When something else is needed
It helps to know what we cannot do too:
- Render that’s blown, hollow or coming away
- Cracking across the wall rather than at a joint
- Damp that is not coming from the joint
If in doubt, call 0345 464 0079 or send us an email and we will say what we think before booking.
Surfaces we seal
- Copings & trims
- Façade panels
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
Why it’s worth doing now in Balls Cross
Running new sealant over the old bead rarely lasts. The new layer can’t bond properly to old, weathered material, so the old joint is cut out fully first. Around Balls Cross, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why us?
- Anti-fungal silicone where joints get wet
- We agree the colour with you first
- Old sealant always removed completely
- Experience in homes, commercial sites and hotels
Take a look at what affects the cost and customer reviews.
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Keep high-pressure jets off the joints
- Keep soil, plants and ivy away from the joints
- Make sure movement joints are not pointed over
- Leave the joints unpainted unless we’ve said otherwise
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Act while the splits are small. Then it’s a straightforward cut-out and reseal.
Landlords, agents and businesses in Balls Cross
We also work for property managers and facilities teams in Balls Cross and across West Sussex. We can quote a run of properties together, and we are fully insured.
Landlords and letting agents in Balls Cross can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
External mastic in Balls Cross: local notes
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 Petworth House (about 2.9 miles south) are a reminder that the area around Balls Cross has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
In the older streets around Holy Trinity Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Around Balls Cross, as everywhere, external mastic is only as good as the preparation behind it.
Balls Cross is about 12 miles west of Horsham, in West Sussex. For external mastic in and around Balls Cross, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We’re based in Crawley and cover West Sussex, Balls Cross included. Our area takes in 371 places across West Sussex. For nearby work, see our Crawley page.
Here we cover the GU28 postcode area for external mastic. Other places close to Balls Cross include Kirdford (2 miles east), Mackerel's Common (2 miles north-east), Plaistow (3 miles north-east), Ifold (4 miles north-east) and Wisborough Green (4 miles east). We also work in nearby towns such as Horsham (12 miles east), Chichester (15 miles south-west), Littlehampton (15 miles south), Rustington (15 miles south), Storrington (10 miles south-east) and Billingshurst (6 miles east).
What’s near Balls Cross
A little further out are Lodsworth Castle (4.7 miles south-west). Green spaces nearby include The Mens and Shillinglee Lake.