Kent · England
External Mastic in Leadingcross Green
Sealing brickwork movement joints, render, cladding and façade joints in Leadingcross Green, with a one-year guarantee on every job. Call for a quick quote.
- Hard, crazed mastic that has stopped moving
- Failed sealant between panels on a façade
- Cracked joints where brick meets render or frames
Aftercare tips
To keep the joints looking good and working properly:
- Deal with leaking gutters that soak the joints below
- Wash walls gently around the sealant
- Tell anyone working on the walls about the movement joints
- Walk round the building once a year and look at the joints
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.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
External mastic in Leadingcross Green, done properly
On houses, flats and commercial buildings across Leadingcross Green, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. We work on joints between brick and frames, render & cladding joints and façade panels, and the jobs we see most are joints with sealant missing in places and old sealant gone brittle and cracked.
Somewhere as small as Leadingcross Green, 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.
We stand behind the work with a 12-month guarantee, so you are covered after we’ve gone.
- Location
- Leadingcross Green (ME17)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What the job involves on each surface
Copings and trims
Coping joints that leak let water straight down into the wall. Sealing them early saves the wall below.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that’s happened, we rake it out and reseal it properly.
What we’re called out for in Leadingcross Green
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
These are the problems we are asked about most:
- Gaps where render, brick and frames meet
- Joints pointed up with cement by mistake
- Sealant pulling away from one side of the joint
- Panel joints letting water in
Homes close to St Mary's Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Before booking anyone
- How the joint is cleaned and prepared
- Who does the work, and how experienced they are
- Whether they’re fully insured
- Is VAT in the price?
External mastic in Leadingcross Green: local notes
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 3.6 miles west) are a reminder that the area around Leadingcross Green has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
If you let a flat or house near Lenham station, outside joints that have cracked can let damp into a rental, so check them between lets. For site and facilities teams at buildings such as Lenham Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Leadingcross Green is about 8 miles south of Sittingbourne, in Kent. We carry out external mastic for homes and businesses in Leadingcross Green and the surrounding area. Leadingcross Green is one of 922 places in Kent where we work for external mastic. Chelmsford is on our list too, about 36 miles from Leadingcross Green.
Every address in ME17 is covered for external mastic, from the main roads to the quietest streets. We cover properties on Headcorn Road and Boughton Road and the roads around them. Neighbouring places we cover for external mastic include Lenham (1 mile north), Lenham Forstal (2 miles south-east), Woodside Green (2 miles north-east), West Street (2 miles north-east) and Lenham Heath (2 miles south-east). Larger places within reach include Maidstone (8 miles west), Ashford (9 miles south-east), Sittingbourne (8 miles north), Faversham (10 miles north-east), Minster (14 miles north) and Kings Hill (13 miles west).
Around Leadingcross Green
We work in homes and buildings around Wishful Thinker pub, Kiln Wood and The Lenham School and the streets around them. There’s a railway station in Leadingcross Green itself: Lenham station. Well-known places in the area include Coldbridge Castle (2.3 miles south) and The Dog Collar Museum (3.5 miles west).
Also near Leadingcross Green
Also in Leadingcross Green
What affects the quote in Leadingcross Green
The price is agreed before any work begins. It’s based on:
- How easy the joints are to reach
- How many rooms, windows or areas are involved
- Any mould that needs treating
- The number and length of the joints
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, phone 0345 464 0079 or email us for an honest opinion and a quote.
Helping us quote
What to tell us when you ask for a quote:
- Whether it’s a home or a business
- The address or postcode of the job
- How we’d reach the joints
- Whether it has been sealed before
We quote each job on its own, so the first step is telling us about yours. Just ring 0345 464 0079 or drop us an email with the details, and photos are welcome.
How it works
We keep the work tidy and contained to the joints we are treating, so you can get on with your day. Expect the work to take a few hours to a few days, depending on the length of joint and the access, and we explain the cure time before we leave. Somewhere as small as Leadingcross Green, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- For business premises, tell us about site rules or sign-in
- Keep children and pets away from the work area
Get 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 before giving you a price.
Related advice
Why it’s worth doing now in Leadingcross Green
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner so it’s worth doing right. In a small place like Leadingcross Green, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Call for a quick quote and we will go through it with you.
What you get with us
- More than 20 years in sealant work
- Old sealant always removed completely
- Full insurance on every job
- Anti-fungal sanitary silicone in wet areas
Take a look at our cost guide and what customers say.
Landlords, agents and businesses in Leadingcross Green
For anyone letting property in or around Leadingcross Green, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will quote.
Leadingcross Green: your questions answered
Will you come out to Leadingcross Green?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you do external mastic in Leadingcross Green?
Yes, Leadingcross 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 send you a clear quote.
Do you remove the old sealant?
Yes, every time. New sealant will not bond properly to old, so the joint is cleaned back first.
Will you leave a mess?
Tidy work is part of the job. We protect what’s around the joints, and the area is left clean when we finish.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Where is Mr Mastic based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.