Kent · England
External Mastic in Mundy Bois
External mastic for Mundy Bois and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Joints pointed up with cement by mistake
- Moss and dirt in joints with no sealant left
- Damp patches traced to an open external joint
About our external mastic in Mundy Bois
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, so once it splits or hardens, the joint stops working and water gets in. Common call-outs are for movement joints with cracked, split or missing sealant and rigid filler in a joint that should flex, across façade panels, joints between brick and frames and copings & trims.
Older homes in small places like Mundy Bois may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water generally gets in, and they need the right sealant at the right depth.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Mundy Bois (TN27)
- Region
- Kent
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
When it is not the sealant
Before you book, it’s worth knowing the limits:
- Rising or penetrating damp from elsewhere in the wall
- Walls that need new movement joints cut into them
- Cracking across the wall rather than at a joint
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly.
Surfaces we seal
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Render & cladding joints
Mundy Bois: your questions answered
Do you cover Mundy Bois for external mastic?
Yes, Mundy Bois is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Can you help a landlord with a rental near Pluckley station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will send you a clear quote.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Do you use backing rod?
That’s backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only, which would stop it stretching.
How long does external mastic take?
As a guide, most jobs take anything from a few hours to several days, depending on the building. Larger jobs naturally take longer, and we’ll tell you how long to expect.
Should I try DIY first?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll give you the cure time for the product we used.
Quotes for external mastic in Mundy Bois
Your quote is based on your job. We look at:
- How much old sealant there is and how hard it is to remove
- Whether the work is at height
- How many areas need sealing
- Working hours on commercial sites
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
What we need to know
What to tell us when you ask for a quote:
- Any previous sealing or DIY work
- Where the property is
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Places near Mundy Bois
What else we do in Mundy Bois
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Keep high-pressure jets off the joints
- Keep water from gutters off the wall
- Get split or bare joints resealed while the damage is small
- Do not let climbing plants root in the sealant
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
How the visit works
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to several days, depending on the building. In a small place like Mundy Bois, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- 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.
Before we arrive
- Move anything stored near the joints
- On commercial sites, let us know about site rules
- Mention any parking rules near the property
Get a quote
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and send you a clear quote before any work starts.
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External mastic in Mundy Bois: local notes
Historic houses like Godinton House (about 5 miles east) are a reminder that the area around Mundy Bois 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. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Egerton Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing. Homes close to Church of St James include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Mundy Bois is about 7 miles north-west of Ashford, in Kent. We provide external mastic to householders, landlords and businesses in Mundy Bois and nearby, as part of our work across Kent. Across Kent, we cover 922 places, and Mundy Bois is one of them. You can also see our page for Crawley, about 40 miles away.
Jobs for external mastic in TN27 works the same way as everywhere else we cover. Streets in the area include Munday Bois Road, Kingsland Lane and Greenhill Lane, all of which we cover. Close by, we work in Newland Green (1 mile west), Egerton Forstal (1 mile west), Egerton (1 mile north), Potter's Forstal (1 mile north-west) and Pluckley Thorne (1 mile south-east). Larger places within reach include Maidstone (10 miles north-west), Ashford (7 miles south-east), Sittingbourne (11 miles north), Faversham (12 miles north-east), Kings Hill (15 miles north-west) and Davington (12 miles north-east).
Around Mundy Bois
For rail, the closest station is Pluckley station, roughly 2 miles south-east of the centre. Other landmarks nearby include Coldbridge Castle (1.7 miles north-west).
What we are called out for in Mundy Bois
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, and it tears off the sides.
It’s worth asking for a quote if you see:
- Plants rooting in failed movement joints
- Cracked joints where brick meets render or frames
- Old sealant gone brittle and cracked
- Water getting into walls through failed joints
For landlords with property near Pluckley station, outside joints that have cracked can let damp into a rental, so check them between lets.
Before booking anyone
- Is VAT in the price?
- Whether the sealant suits the joint
- Whether they’re fully insured
- What happens if they find a problem under the old sealant