Kent · England
External & façade joints in Lenham, Kent
External mastic in Lenham from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Joints with sealant missing in places
- Movement joints filled with mortar instead of sealant
- Weathered mastic that no longer stretches
The process
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and tidy away. It usually takes a few hours to a few days, depending on the length of joint and the access. In a smaller place like Lenham, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Clear the area around the work
- Plan for the work area to be out of bounds to pets and children
- Tell us about any previous sealing or DIY attempts
Getting a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will explain what’s involved and give you a clear quote.
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External mastic for homes and businesses in Lenham
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. Common call-outs are for rain getting behind render or cladding at a joint and joints where the bead has come unstuck, across joints between brick and frames, render & cladding joints and façade panels.
In and around Lenham, older properties sit alongside newer ones, each with its own outside joints. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
Whatever the size of the job, it’s backed by our 12-month guarantee in Lenham and across Kent.
- Location
- Lenham (ME17)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near Lenham
Also in Lenham
FAQs for Lenham
Is Lenham in your area for external mastic?
Yes, Lenham is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
Will you come out to Lenham?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do I need to be at home?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Is the work guaranteed?
Yes: twelve months. If anything is not right with the work within the year, let us know and we’ll sort it.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you when we finish.
Do you use backing rod?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides so it can flex with the joint.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few photos.
Can landlords and businesses book you?
Yes, often. We can quote for several properties at once.
What happens if it’s left?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. Homes in smaller places like Lenham can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will go through it with you.
What you get with us
- Homes, businesses and hotels
- We are fully insured
- You choose the colour before work begins
- Any old sealant cut out fully, not covered over
Read what affects the cost or what customers say.
Lenham buildings and the weather
Historic houses like Leeds Castle (about 3.6 miles west) are a reminder that the area around Lenham 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. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near St Mary's Church, an extension built onto an older house moves differently, and the joint between them takes the strain. For site and facilities teams at buildings such as Lenham Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Lenham is about 7 miles south of Sittingbourne, in Kent. Lenham gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. 922 places in Kent are on our list, large and small. You can also see our page for Chelmsford, roughly 36 miles from Lenham.
Every address in ME17 is within our area for external mastic, from the main roads to the quietest streets. Whether your property is on High Street, Mitchell Close and Hatch Road or anywhere close by, our applicators can take on the job. We also cover Leadingcross Green (1 mile south), Woodside Green (1 mile north-east), West Street (1 mile north-east), Lenham Forstal (2 miles south-east) and Lenham Heath (2 miles south-east). Within a short drive, we also cover Maidstone (8 miles west), Ashford (9 miles south-east), Sittingbourne (7 miles north), Faversham (9 miles north-east), Minster (13 miles north) and Kings Hill (13 miles west).
Around Lenham
We work in homes and buildings around Kiln Wood, The Red Lion pub and The Lenham School, among other places. There’s a railway station in Lenham itself: Lenham station. Well-known places in the area include Coldbridge Castle (2.7 miles south) and The Dog Collar Museum (3.6 miles west).
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- The number and length of the joints
- Working hours on commercial sites
- How easy the joints are to reach
- Which sealant suits the joint
The cost depends on the amount of work, how much old material has to come out and access to the work. We give a clear quote before any work starts, so you know where you stand.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- Access, such as stairs, a lift or height
- A few photos by email, if you can
- If someone has resealed it before
- Roughly how big the job is
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
For landlords and businesses
For anyone letting property in or around Lenham, several properties can be quoted together. Send us the addresses and the work at each.
Landlords and letting agents in Lenham can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
When to call us in Lenham
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
Common reasons people contact us are:
- Moss and dirt in joints with no sealant left
- Joints pointed up with cement by mistake
- Brick movement joints where the sealant has split
- Damp patches traced to an open external joint
For landlords with property near Lenham station, split movement joints are easy to miss on a rental until damp shows inside.
Questions to ask before you book
- How the colour is chosen
- Is the old sealant removed completely?
- Whether VAT is included
- The length of the guarantee
Honest limits
It helps to know what we can’t do too:
- Walls that need new movement joints cut into them
- Subsidence or other structural problems
- Loose or hollow render, which needs re-rendering
If you’re not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Concrete & block
- Copings & trims
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly.
Sealing over old silicone is the commonest DIY error. 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.