Kent · England
West Kingsdown External Mastic
Professional external mastic in and around West Kingsdown, with every bit of old sealant taken out first and a 12-month guarantee.
- Sealant that has lost its bond to the brick or render
- Water getting into walls through failed joints
- Brick movement joints where the sealant has split
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
External mastic for homes and businesses in West Kingsdown
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. We work on brickwork movement joints, concrete & block and render & cladding joints, and the jobs we see most are sealant that has lost its bond to the brick or render and movement joints with cracked, split or missing sealant.
Outbuildings, garages and conservatories around homes in places like West Kingsdown add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- West Kingsdown (TN15)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlord and commercial work in West Kingsdown
Landlords and letting agents in West Kingsdown 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.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Point out the joints to other trades
- Leave the joints unpainted unless we have said otherwise
- Wash walls gently around the sealant
- Make sure movement joints are not pointed over
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Act while the splits are small. Then it’s a straightforward cut-out and reseal.
Signs you need external mastic in West Kingsdown
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
Keep an eye out for these signs:
- Weathered mastic that no longer stretches
- Movement joints filled with mortar instead of sealant
- Panel joints letting water in
- Plants rooting in failed movement joints
If you look after a building such as West Kingsdown CofE VC Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Questions to ask before booking
- What insurance they hold
- Whether you can choose the colour
- Is the old sealant removed completely?
- How long the guarantee is
West Kingsdown: your questions answered
Do you cover smaller places like West Kingsdown?
Yes, West Kingsdown is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you work for landlords with property near Eynsford station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Do you guarantee your work?
Yes, always. Each job is guaranteed for twelve months.
When will the joints need doing again?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Our work comes with a 12-month guarantee.
How much does external mastic cost in West Kingsdown?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before any work starts.
Can you do several jobs on one visit?
Yes. More than one area can be quoted together.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
How we quote for external mastic
Your quote is based on your job. We look at:
- How much there is to do
- Any mould that needs treating
- The product the joint needs
- Access and height
The cost reflects the work involved, not guesswork. That is why we ask about the job first.
Asking for a quote
What to tell us when you ask for a quote:
- If it’s domestic, commercial or a hotel
- Access, such as stairs, a lift or height
- A few photos by email, if you can
- Roughly how big the job is
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you’re ready, ring 0345 464 0079 or send us an email.
Also near West Kingsdown
Other services in West Kingsdown
What we do, step by step
Before we leave, we go over the finished joints with you and explain the cure time. The work normally 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. For a job in West Kingsdown, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Move anything stored near the joints
- On commercial sites, let us know about site rules
- Let us know if you’ve seen damp or leaks
Getting a quote
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
When it is not the sealant
Sealant is not the answer to every problem, and we’ll tell you before work begins. Sealant won’t put right:
- Failed render or damaged cladding panels
- Rising or penetrating damp from elsewhere in the wall
- Walls that need new movement joints cut into them
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Surfaces we seal
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Façade panels
- Render & cladding joints
What external mastic looks like in West Kingsdown
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. Historic houses like Lullingstone Castle (about 2.8 miles west) are a reminder that the area around West Kingsdown 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.
Rented homes near Eynsford station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. Homes close to Church of Saint Edmund include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
West Kingsdown is about 6 miles north-east of Sevenoaks, in Kent. Whether you are in the middle of West Kingsdown or further out, we cover external mastic for every kind of property. Across Kent, we cover 922 places, West Kingsdown among them. We also work in London, around 19 miles away.
We cover every part of the TN15 postcode area for external mastic and the streets around it. You’ll find streets such as Church Road, London Road and Hever Wood Road, all of which we cover. If you’re just outside West Kingsdown, we cover Maplescombe (1 mile north-west), Knatts Valley (1 mile south-west), East Hill (1 mile south-west), Fawkham Green (2 miles north-east) and Ash (2 miles north-east). Further out, we also cover Maidstone (13 miles south-east), Dartford (7 miles north), Sevenoaks (6 miles south-west), Royal Tunbridge Wells (15 miles south), Gravesend (8 miles north-east) and Tonbridge (10 miles south).
Around West Kingsdown
West Kingsdown’s nearest station is Eynsford station, about 2.6 miles north-west. Other landmarks nearby include Otford Heritage Centre (3.8 miles south-west) and Eynsford Castle (2.6 miles north-west).