West Sussex · England
Maplehurst External Mastic
We cover Maplehurst for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Water getting into walls through failed joints
- Brick movement joints where the sealant has split
- Failed sealant between panels on a façade
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Look over the joints every year, ideally after winter
- Check the sealant is paintable before painting near it
- Deal with leaking gutters that soak the joints below
- Point out the joints to other trades
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage.
External mastic in Maplehurst
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a matching colour. If you’re dealing with moss and dirt in joints with no sealant left and hard, crazed mastic that has stopped moving, we can put it right, on façade panels, joints between brick and frames and concrete & block alike.
Somewhere as small as Maplehurst, homes and farm buildings often face open ground, 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.
All of our work is guaranteed for twelve months.
- Place
- Maplehurst (RH13)
- Region
- West Sussex
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Common problems we fix in Maplehurst
If plants are growing out of a joint, the sealant has normally failed or was never there. Roots and dirt hold water against the wall and speed up the damage.
Common reasons people contact us are:
- Failed seals between different materials
- Rain getting behind render or cladding at a joint
- Leaking joints around cladding and façade panels
- Old sealant gone brittle and cracked
Schools such as St Andrew's CofE Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Questions to ask before you book
- How the joint is cleaned and prepared
- How long the guarantee is
- Whether they seal over old material or remove it
- When the joint can take water or movement
Honest limits
To be straight with you, some problems need a different trade:
- Cracking across the wall rather than at a joint
- Failed render or damaged cladding panels
- Damp that is not coming from the joint
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Where we work in Maplehurst
- Copings & trims
- Render & cladding joints
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Concrete & block
Places near Maplehurst
Other services in Maplehurst
Maplehurst questions
Do you cover Maplehurst for external mastic?
Yes, Maplehurst is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing.
Do you work for landlords with property near Christs Hospital station?
Yes. We work for landlords and agents as well as homeowners. Just ring 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear price.
Can you do several jobs on one visit?
Yes. Just list everything you need and we will quote it together.
Are you insured?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
How long does external mastic last?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Our work comes with a one-year guarantee.
Do you guarantee your work?
Yes. Each job is guaranteed for twelve months, large or small.
Can a movement joint be filled with mortar?
No. Cement or mortar cannot stretch. Where a joint has been mortared, it can often be raked out and sealed properly.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages.
What happens if it’s left?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost, so the damage spreads beyond the joint. In a small place like Maplehurst, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first.
Why us?
- We’re fully insured
- An ARBOMaster approved applicator
- 4.9 on Google from 180+ five-star reviews
- 20+ years of sealant experience
Outside joints around Maplehurst
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Christs Hospital station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. If you live in an older home near The Parish Church of St Andrew, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Maplehurst is about 4 miles south of Horsham, in West Sussex. For external mastic in and around Maplehurst, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover West Sussex from our Crawley base, Maplehurst included. 371 places in West Sussex are on our list. Crawley is on our list too, about 9 miles from Maplehurst.
Here we cover the RH13 postcode area for external mastic. Streets in the area include Nuthurst Road, Park Lane and Copsale Road, all of which we cover. We also cover Nuthurst (1 mile north), Southwater (2 miles north-west), Tower Hill (4 miles north-west), Brooks Green (4 miles west) and Horsham (4 miles north). Larger places within reach include Crawley (9 miles north-east), Worthing (13 miles south), Haywards Heath (9 miles east), Burgess Hill (9 miles south-east), East Grinstead (15 miles north-east) and Shoreham-by-Sea (12 miles south).
Near you in Maplehurst
The nearest railway station is Christs Hospital station, about 3.8 miles north-west. Well-known places in the area include Horsham Hospital (4.3 miles north) and Christs Hospital School Museum (3.5 miles north-west). The countryside around Maplehurst includes Knepp Wildland.
The process
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and clear up. Most jobs take anything from a few hours to several days, depending on the building. For a village or hamlet like Maplehurst, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Let us know if you’ve seen damp or leaks
- Plan for the work area to be out of bounds to pets and children
- On commercial sites, let us know about site rules
Getting a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved.
Read more
Different surfaces, different methods
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.
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. A primer goes on where the product requires one before sealing.
DIY sealant or a professional job?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.