West Sussex · England
External Mastic in Dragons Green
Professional external mastic in and around Dragons Green, with every bit of old sealant taken out first and a 12-month guarantee.
- Damp patches traced to an open external joint
- Plants rooting in failed movement joints
- Gaps where render, brick and frames meet
Dragons Green questions
Will you come out to Dragons Green?
Yes, Dragons Green is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
I let a flat near Billingshurst station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
Do the sealants smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
How long does external mastic take?
It depends on the size of the job, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We’ll give you a better idea when we quote.
What does external mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or drop us an email with a short description of the job.
What is backing rod for?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back, so the joint can move.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
External mastic for homes and businesses in Dragons Green
For buildings in Dragons Green, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. We’re often asked to deal with failed seals between different materials and rain getting behind render or cladding at a joint, on brickwork movement joints, joints between brick and frames and concrete & block.
Outside joints can only be sealed when they’re dry, so work in Dragons Green is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Dragons Green (RH13)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlords, agents and businesses in Dragons Green
Letting agents and landlords in Dragons Green can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured for the work.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Make sure movement joints aren’t pointed over
- Tell anyone working on the walls about the movement joints
- Walk round the building once a year and look at the joints
- Check the sealant is paintable before painting near it
Don’t let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.
The process
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a handful of joints, longer for a whole elevation, and the area is left clean. Somewhere like Dragons Green needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip 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.
- We apply the sealant, tool it and check the whole run.
How to prepare
- On commercial sites, let us know about site rules
- Try not to wet indoor joints just before the visit
- Clear the area around the work
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that’s easy.
Advice
DIY sealant or a professional job?
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.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What happens if it’s left?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. Older cottages and farmhouses around Dragons Green can have timber 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 us?
- White, clear, grey or another colour, product permitting
- Experience in homes, commercial sites and hotels
- Old sealant always removed completely
- A 12-month guarantee on all work
Read what affects the cost and customer reviews.
Walls and rooflines in Dragons Green
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Billingshurst station? Then split movement joints are easy to miss on a rental until damp shows inside. Homes close to The Church of St Mary the Virgin include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Dragons Green is about 5 miles south-west of Horsham, in West Sussex. Jobs in Dragons Green get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 371 towns and villages across West Sussex, from the larger towns to small villages. You can also see our page for Crawley, about 11 miles away.
Work in RH13 is quoted and booked the same way as anywhere else. External mastic is available to properties on Dragons Lane and Dragons Green Road. Nearby, we also carry out external mastic in Shipley (1 mile south), Whitehall (1 mile south), Broomer's Corner (2 miles south-west), Dial Post (3 miles south) and West Grinstead (3 miles south-east). Further out, we also cover Crawley (11 miles north-east), Horsham (5 miles north-east), Worthing (12 miles south), Haywards Heath (12 miles east), Burgess Hill (11 miles east) and Littlehampton (15 miles south-west).
Around Dragons Green
The nearest railway station is Billingshurst station, about 3.4 miles west of the centre. Nearby you will also find Horsham Hospital (5.4 miles north-east) and Christs Hospital School Museum (3.2 miles north). The countryside around Dragons Green includes Knepp Wildland.
What we’re called out for in Dragons Green
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.
If you can see any of these, it’s time to have the joints looked at:
- Rigid filler in a joint that should flex
- Joints where the bead has come unstuck
- Weeds or debris growing in open joints
- Cracked joints where brick meets render or frames
If you look after a building such as Shipley CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Before booking anyone
- Whether you can choose the colour
- When the joint can take water or movement
- Is VAT in the price?
- What happens if the job turns out different
Surface by surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so its sealant has to stay flexible.
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind.