West Sussex · England
External Mastic in West Hoathly
Professional external mastic in and around West Hoathly, with old sealant always removed completely and a one-year guarantee.
- Hard, crazed mastic that has stopped moving
- Sealant pulling away from one side of the joint
- Rain getting behind render or cladding at a joint
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
External mastic in West Hoathly
Low-level joints can generally be done from the ground. For joints higher up, give us some details of the building and we will confirm what access is needed. We work on façade panels, copings & trims and render & cladding joints, and people most often call us about joints where the bead has come unstuck and joints pointed up with cement by mistake.
Older homes in small places like West Hoathly may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in.
Your job is guaranteed for a year, as with all our work.
- Place
- West Hoathly (RH19)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a handful of joints, longer for a whole elevation. Somewhere like West Hoathly needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Mention any leaks or damp you’ve noticed
- Let us know about parking restrictions
- Mention if the joints have been sealed before
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, ring 0345 464 0079 or email us.
Advice
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Ask before painting over external sealant
- Keep high-pressure jets off the joints
- Never let anyone fill a movement joint with mortar
- Point out the joints to other trades
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Once a joint cannot move, the wall finds another way, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Also near West Hoathly
Other services in West Hoathly
FAQs for West Hoathly
Is West Hoathly within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near East Grinstead station?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Are you fully insured?
Yes, we’re fully insured for every job we do.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
How much does external mastic cost in West Hoathly?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before any work starts.
Is it OK to fill a movement joint with cement?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose, and the wall may crack nearby. We’ll reseal it with a flexible sealant.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
How long will you be here?
As a guide, most jobs take anything from a few hours to several days, depending on the building. Bigger jobs take longer, and we will tell you how long to expect.
What affects the cost of external mastic
The price is agreed before any work begins. It takes into account:
- When we can work, for business premises
- The product the joint needs
- How much old sealant there is and how hard it is to remove
- Access and height
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We’ll send you a clear quote for the lot.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Any access issues, like height or stairs
- Whether it’s a home or a business
- Any previous sealing or DIY work
- Pictures of the joints, sent by email
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
Do you need external mastic in West Hoathly?
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, and it tears off the sides.
The problems people generally mention when they call are:
- Joints pointed up with cement by mistake
- Weeds or debris growing in open joints
- Old sealant gone brittle and cracked
- Leaking joints around cladding and façade panels
For site and facilities teams at buildings such as West Hoathly CofE Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Comparing quotes
- How hidden problems are handled
- The length of the guarantee
- What product goes in the joint
- Is VAT in the price?
West Hoathly buildings and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Priest House (about 0.2 miles south-west) are a reminder that the area around West Hoathly 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 St Margaret's Church, the joints between older walls, newer extensions and the roofline need a sealant that can move. Letting a property close to East Grinstead station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
West Hoathly is about 4 miles south-west of East Grinstead, in West Sussex. Jobs in West Hoathly get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 371 places across West Sussex, from the larger towns to small villages. Crawley is on our list too, about 6 miles from West Hoathly.
All of RH19 is covered for external mastic. If you need external mastic at a property on Hilltop Road, Sandy Lane and North Lane or anywhere close by, our applicators can take on the job. We also cover the places around West Hoathly: Sharpthorne (1 mile east), Selsfield Common (1 mile north-west), Highbrook (2 miles south), Little London (2 miles south-west) and Ardingly (2 miles south-west). Larger places within reach include Crawley (6 miles west), Horsham (12 miles west), Haywards Heath (6 miles south), Burgess Hill (9 miles south), East Grinstead (4 miles north-east) and Broadfield (7 miles west).
Near you in West Hoathly
Around West Hoathly, our work takes us to homes and buildings near The Fox pub and the streets around them. West Hoathly’s nearest station is East Grinstead station, roughly 3.7 miles north-east. Other landmarks nearby include East Grinstead Museum (3.8 miles north-east) and Waterbury Castle (2.8 miles south). Green spaces nearby include Hedgecourt Lake.
What happens if it’s left?
Resealing a run of joints in one go is usually better than patching one at a time. They’ve weathered the same way and it means sorting access once. Around West Hoathly, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start.
Why us?
- Anti-fungal sanitary silicone in wet areas
- Over 20 years’ experience
- White, clear, grey or another colour, product permitting
- Experience in homes, commercial sites and hotels
Read what affects the cost or our reviews.
Landlord and commercial work in West Hoathly
If you manage several properties in or around West Hoathly, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and photos by email help.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.