Kent · England
External Mastic in Lunsford
Problem with your movement joints in Lunsford? We cut out the old, prepare the joints and apply the right sealant.
- Joints where the bead has come unstuck
- Rain getting behind render or cladding at a joint
- Movement joints with cracked, split or missing sealant
About our external mastic in Lunsford
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. We work on façade panels, brickwork movement joints and render & cladding joints, and people most often call us about rigid filler in a joint that should flex and moss and dirt in joints with no sealant left.
In and around Lunsford, older properties sit alongside newer ones, each with its own outside joints. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Place
- Lunsford (ME20)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
Looking after new joints is easy:
- Don’t let climbing plants root in the sealant
- Fix overflowing gutters above sealed joints
- Walk round the building once a year and look at the joints
- Leave the joints unpainted unless we’ve said otherwise
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Small splits are the time to act. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
Honest limits
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracks in the bricks or render themselves, away from the joints
- Loose or hollow render, which needs re-rendering
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
Surfaces we seal
- Joints between brick and frames
- Façade panels
- Concrete & block
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- Any working-time requirements on site
- How much old sealant there is and how hard it is to remove
- The size of the job
- Which sealant suits the joint
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- The type of property
- The address or postcode of the job
- What’s wrong with the joints now
- Whether it has been sealed before
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved.
Why deal with it now?
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. Homes in smaller places like Lunsford 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.
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why Lunsford clients choose us
- Approved under the ARBOMaster scheme
- Anti-fungal sanitary silicone in wet areas
- Over 20 years’ experience
- A sealant colour to suit the surroundings
Read what affects the cost or customer reviews.
What happens on the day
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours to a few days, depending on the length of joint and the access. A visit to Lunsford is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- 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.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
If you are in Lunsford and need external mastic, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Read more
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote, and we’re fully insured.
Outside joints around Lunsford
Historic houses like Starkey Castle (about 3.8 miles north) are a reminder that the area around Lunsford 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. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you look after a building such as Lunsford Primary School, its movement joints, gutters and trims need looking after like any other building’s. For an older house near a landmark such as Church of the Holy Trinity, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For landlords with property near New Hythe station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Lunsford is about 5 miles north-west of Maidstone, in Kent. From the centre of Lunsford to the outskirts, we cover external mastic for every kind of property. Across Kent, we cover 922 places, and Lunsford is one of them. There’s also a page for London, about 26 miles away.
Our applicators cover all of ME20 for external mastic. That includes homes and businesses on Sassoon Close, Chaucer Way and Masefield Road and the roads around them. Neighbouring places we cover for external mastic include New Hythe (1 mile east), Larkfield (1 mile south), Leybourne (1 mile south-west), Snodland (1 mile north) and Birling (1 mile west). Within a short drive, we also cover Maidstone (5 miles south-east), Sittingbourne (13 miles east), Dartford (13 miles north-west), Sevenoaks (11 miles west), Royal Tunbridge Wells (14 miles south-west) and Gravesend (9 miles north).
Near you in Lunsford
Typical jobs here are in homes near Leybourne Lakes Country Park, The Malling School and The Holmesdale School and the streets around them. The closest station to Lunsford is New Hythe station, about 0.7 miles east of the centre. Other landmarks nearby include Maidstone Hospital (3.2 miles south-east) and Leybourne Castle (0.9 miles south-west). Open spaces near Lunsford include Blue Bell Hill and Burham Down.
More services for Lunsford
Common questions in Lunsford
I let a flat near New Hythe station. Can you help?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Can you do external mastic in Lunsford?
Yes, Lunsford is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear price.
How long does external mastic last?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Every job carries our one-year guarantee.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. There’s a wide choice of exterior colours.
Do you hold any approvals?
Yes. We’re approved under the ARBOMaster scheme.
Is it OK to fill a movement joint with cement?
No. Cement or mortar can’t stretch, so the joint stops doing its job. Where a joint has been mortared, it can often be raked out and sealed properly.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
What does external mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.