Kent · England
External & façade joints in Hearnden Green, Kent
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Hearnden Green and across Kent. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Brick movement joints where the sealant has split
- Panel joints letting water in
- Moss and dirt in joints with no sealant left
About our external mastic in Hearnden Green
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where mortar or filler would crack. We’re often asked to deal with weeds or debris growing in open joints and gaps where render, brick and frames meet, across joints between brick and frames, render & cladding joints and façade panels.
External sealant needs dry, clean surfaces, so work around Hearnden Green is planned for dry weather. 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.
- Place
- Hearnden Green (TN27)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What external mastic looks like in Hearnden Green
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Leeds Castle (about 4.1 miles north) are a reminder that the area around Hearnden Green has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
For landlords with property near Headcorn station, split movement joints are easy to miss on a rental until damp shows inside. Historic houses such as Leeds Castle, about 4.1 miles north, show how far back building around Hearnden Green goes, and older homes nearby need a sealant that suits their walls.
Hearnden Green is about 6 miles south-east of Maidstone, in Kent. If you need external mastic in Hearnden Green, please call 0345 464 0079 or send us an email for a quick quote. We cover Kent from our Crawley base. Across Kent, we cover 922 places, and Hearnden Green is one of them. There’s also a page for Crawley, roughly 35 miles from Hearnden Green.
Every address in TN27 is within our area for external mastic, from the main roads to the quietest streets. Close by, we work in Headcorn (1 mile south-east), Southernden (2 miles east), Swift's Green (3 miles south-east), Smarden Bell (3 miles south-east) and Lashenden (4 miles south). Larger places within reach include Maidstone (6 miles north-west), Ashford (12 miles east), Sittingbourne (12 miles north-east), Royal Tunbridge Wells (15 miles west), Tonbridge (15 miles west) and Faversham (15 miles north-east).
Local landmarks in Hearnden Green
The nearest railway station is Headcorn station, roughly 1.8 miles south. Well-known places in the area include Sutton Valence Castle (1.7 miles north-west) and Kent Firefighting Museum (3.6 miles south).
What we do, step by step
At the end, we look at the finished work together and tell you how long to leave it. The visit itself generally takes a few hours to a few days, depending on the length of joint and the access, depending on how much there is to do. In a small place like Hearnden Green, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Mention any leaks or damp you’ve noticed
- For indoor joints, keep the area dry beforehand if you can
- For business premises, tell us about site rules or sign-in
Getting a quote
Asking for a quote is easy: let us know the job and the location. A few photos by email make the job easier to understand.
Advice
Nearby places to Hearnden Green
What else we do in Hearnden Green
Landlords, agents and businesses in Hearnden Green
Letting agents often deal with us directly. Tell us the address, the job and how access works.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Should I try it myself first?
A DIY attempt does not rule out a professional job. We cut it out and start again.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Surface by surface
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Questions from Hearnden Green
Is Hearnden Green in your area for external mastic?
Yes, Hearnden Green is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear quote.
I let a flat near Headcorn station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Will there be a smell?
There can be a smell while the sealant cures. Ventilation helps.
Is there a guarantee?
Yes, for a year. If anything is not right with the work within the year, let us know and we will sort it.
Will the new joint stand out?
The sealant colour is picked to suit the wall so the joint blends in. There’s a wide choice of exterior colours.
Can I add another job to the visit?
Yes. More than one area can go on one quote.
How often do external joints need resealing?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges.
Where is Mr Mastic based?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
How we quote for external mastic
For a quick quote, just ask. What matters most is:
- The type of sealant required
- Mould in or behind the old joints
- When we can work, for business premises
- The number and length of the joints
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Whether it has been sealed before
- The type of property
- Pictures of the joints, sent by email
- The problem you’ve noticed
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work and give you a clear price.
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Act on the first splits you see
- Fix overflowing gutters above sealed joints
- Check the sealant is paintable before painting near it
- Clear growth from the base of walls and joints
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead over time.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
When something else is needed
Before booking, it’s worth knowing the limits too:
- Failed render or damaged cladding panels
- Walls that need new movement joints cut into them
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, phone 0345 464 0079 or email us and we will say what we think before you book.
Joints and surfaces we work on
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Render & cladding joints
- Façade panels