West Sussex · England
External & façade joints in Broomershill, West Sussex
External mastic in Broomershill from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Water getting into walls through failed joints
- Joints pointed up with cement by mistake
- Brick movement joints where the sealant has split
Do you need external mastic in Broomershill?
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
Common reasons people contact us include:
- Hard, crazed mastic that has stopped moving
- Joints pointed up with cement by mistake
- Sealant pulling away from one side of the joint
- Failed seals between different materials
Schools such as St Mary's Church of England Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Questions to ask before booking
- How the colour is chosen
- How long the guarantee is
- How long to leave it before use
- How much experience the applicator has
External mastic in Broomershill
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. We work on concrete & block, render & cladding joints and joints between brick and frames, and common reasons people get in touch are brick movement joints where the sealant has split and damp patches traced to an open external joint.
Somewhere as small as Broomershill, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
A one-year guarantee comes as standard, so you’re covered after we have gone.
- Where
- Broomershill (RH20)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What external mastic looks like in Broomershill
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Old Place Manor (about 1 mile west) are a reminder that the area around Broomershill has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Homes close to The Parish Church of St Mary include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move. Letting a property close to Pulborough station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Broomershill is about 10 miles south-west of Horsham, in West Sussex. If you need external mastic in Broomershill, please ring 0345 464 0079 or drop us an email for a quick quote. We cover West Sussex from our Crawley base. Broomershill is one of 371 towns and villages in West Sussex where we work. Our Crawley page covers work nearby, about 17 miles away.
Jobs for external mastic in RH20 is quoted and booked the same way as anywhere else. Close by, we work in Codmore Hill (1 mile north-west), Marehill (1 mile south-east), Nutbourne (1 mile south-east), North Heath (1 mile north) and Gay Street (1 mile north-east). Larger places within reach include Horsham (10 miles north-east), Worthing (11 miles south), Bognor Regis (15 miles south-west), Chichester (15 miles south-west), Littlehampton (11 miles south) and Shoreham-by-Sea (13 miles south-east).
Local landmarks in Broomershill
We work in homes and buildings around The Red Lion Public House. The closest station to Broomershill is Pulborough station, about 1.3 miles south-west. Nearby you’ll also find Coates Castle (4.4 miles west) and The Storrington And District Museum (3.8 miles south-east). The countryside around Broomershill includes The Mens.
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
What the job involves on each surface
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible in all weathers.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it. Send us any details you have about the façade.
Broomershill questions
I let a flat near Pulborough station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Is Broomershill in your area for external mastic?
Yes. We work across London and the South East, and Broomershill is part of that. You can phone 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear quote.
Do you guarantee your work?
Yes. There’s a 12-month guarantee on every job.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
What colours does the sealant come in?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best.
Do you seal joints where cladding meets other materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
Can you do several jobs on one visit?
Yes, we can. More than one area can be quoted together.
Can a movement joint be filled with mortar?
No. Cement or mortar can’t stretch and the joint fails. If it has already been filled, we can normally cut it out and reseal it.
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Act on the first splits you see
- Fix overflowing gutters above sealed joints
- Check external joints each spring
- Keep soil, plants and ivy away from the joints
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead.
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 so early resealing is worth it.
Quotes for external mastic in Broomershill
There’s no set price list. What we look at:
- Which sealant suits the joint
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
- Any working-time requirements on site
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and give you a clear price before work begins.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- The problem you’ve noticed
- The type of property
- The rough size of the job
- Where the property is
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
Why act early in Broomershill
Running new sealant over the old bead rarely lasts. New sealant does not bond well to old, weathered sealant, so the old joint is cut out fully first. Around Broomershill, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Broomershill clients choose us
- Experience in homes, commercial sites and hotels
- Trusted Arbo and Everbuild sealants
- ARBOMaster approved applicator
- Full insurance on every job
Take a look at how sealant jobs are priced or what customers say.
The process
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours for a handful of joints, longer for a whole elevation. Somewhere like Broomershill needs a little journey planning: 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 look at every joint and agree a colour to suit the wall.
- 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 sign-in or site rules at work premises
- Tell us about any water getting in
- Clear the area around the work
Get a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will explain what’s involved.