West Sussex · England
Nuthurst External Mastic
External mastic in Nuthurst from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Sealant that has lost its bond to the brick or render
- Cracked joints where brick meets render or frames
- Hard, crazed mastic that has stopped moving
External mastic in Nuthurst
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We strip the joint back and start again. We work on façade panels, copings & trims and concrete & block, and people most often call us about movement joints with cracked, split or missing sealant and gaps where render, brick and frames meet.
External sealant needs dry, clean surfaces, so work around Nuthurst is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
You are covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or email us.
- Place
- Nuthurst (RH13)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
Water gets in through a failed movement joint, behind render and cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. Where a wall is exposed, as many are in small places like Nuthurst, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
Why book with us
- ARBOMaster approved applicator
- Sanitary silicone with an anti-fungal additive in wet areas
- A choice of colours where the product allows
- Domestic, commercial and hotel work
Take a look at our cost guide and customer reviews.
Landlord and commercial work in Nuthurst
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Common questions in Nuthurst
Do you work for landlords with property near Horsham station?
Yes. We work for landlords and letting agents as well as homeowners. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you cover Nuthurst for external mastic?
Yes, Nuthurst 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, and we’ll send you a clear quote.
Is it OK to fill a movement joint with cement?
No, not where the gap is a movement joint. Pointing it stops it working, and the wall may crack nearby. A flexible sealant is the right fill.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
How often do external joints need resealing?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
Do you remove the old sealant?
Yes, every time. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Is there any odour?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
What is a movement joint?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
What we do, step by step
We keep the work tidy and contained to the joints we are treating. The job usually takes anything from a few hours to several days, depending on the building, and we tell you how long to leave it before we go. Somewhere as small as Nuthurst, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Tell us about any water getting in
- Mention if the joints have been sealed before
- Let us know about parking restrictions
Get a quote
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand.
Advice
Nearby places to Nuthurst
Also in Nuthurst
Surface by surface
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant if the joint can be cleared.
What sealant work can’t fix
In fairness, some problems need a different trade:
- Structural movement, which needs a surveyor or engineer
- Failed render or damaged cladding panels
- Walls that need new movement joints cut into them
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Where we work in Nuthurst
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Copings & trims
What we are called out for in Nuthurst
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it can’t stretch and rips as the joint opens.
People generally contact us after spotting one of these:
- Failed sealant between panels on a façade
- Joints where the bead has come unstuck
- Moss and dirt in joints with no sealant left
- Hard, crazed mastic that has stopped moving
For landlords with property near Horsham station, outside joints that have cracked can let damp into a rental, so check them between lets.
Questions to ask before booking
- How the colour is chosen
- The length of the guarantee
- Is VAT in the price?
- Who turns up on the day
External mastic in Nuthurst: local notes
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.
For site and facilities teams at buildings such as St Andrew's CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing. For an older house near a landmark such as The Parish Church of St Andrew, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Nuthurst is about 3 miles south of Horsham, in West Sussex. Homes, rented property, offices and hotels in Nuthurst is covered for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Across West Sussex, we cover 371 places, and Nuthurst is one of them. You can also see our page for Crawley, about 8 miles away.
Work in RH13 is quoted and booked the same way as anywhere else. Nearby, we also carry out external mastic in Maplehurst (1 mile south), Southwater (2 miles west), Tower Hill (3 miles north-west), Horsham (3 miles north) and Brooks Green (4 miles west). Within a short drive, we also cover Crawley (8 miles north-east), Worthing (14 miles south), Haywards Heath (9 miles east), Burgess Hill (9 miles south-east), East Grinstead (15 miles north-east) and Shoreham-by-Sea (13 miles south).
Local landmarks in Nuthurst
Around Nuthurst, our work takes us to homes and buildings near Leonardslee. The nearest railway station is Horsham station, roughly 3.1 miles north. A little further out are Christs Hospital School Museum (3.1 miles north-west) and Horsham Hospital (3.4 miles north). For a walk, there’s Knepp Wildland.
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.