Medway · England
External & façade joints in Kingsnorth, Medway
External mastic for Kingsnorth and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Hard, crazed mastic that has stopped moving
- Moss and dirt in joints with no sealant left
- Gaps where render, brick and frames meet
Common problems we fix in Kingsnorth
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and make things worse.
People normally contact us after spotting one of these:
- Weathered mastic that no longer stretches
- Joints with sealant missing in places
- Damp patches traced to an open external joint
- Panel joints letting water in
For site and facilities teams at buildings such as The Hundred of Hoo Academy, larger buildings have long runs of movement joint that eventually need resealing.
Comparing quotes
- How long the guarantee is
- What happens if the job turns out different
- Whether they seal over old material or remove it
- How the colour is chosen
How we handle external mastic in Kingsnorth
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a matching colour. We work on concrete & block, joints between brick and frames and façade panels, and people most often call us about sealant that has lost its bond to the brick or render and cracked joints where brick meets render or frames.
Around Kingsnorth, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water usually gets in.
All our work is covered by our 12-month guarantee.
- Location
- Kingsnorth (ME3)
- Region
- Medway
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Outside joints around Kingsnorth
Kingsnorth is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. 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 let a flat or house near Gillingham (Kent) station, split movement joints are easy to miss on a rental until damp shows inside.
Kingsnorth is about 4 miles north of Gillingham, in Medway. Whether you’re in the middle of Kingsnorth or further out, we cover external mastic for every kind of property. Our Medway coverage runs to 68 places, Kingsnorth among them. There’s also a page for Chelmsford, about 22 miles away.
All of ME3 is within our area for external mastic. You’ll find streets such as Jetty Road and Jacob's Lane, and we cover them all. Nearby, we also carry out external mastic in Tunbridge Hill (1 mile north), Sharnal Street (1 mile north-west), Fenn Street (1 mile north-west), Hoo St Werburgh (2 miles west) and High Halstow (2 miles north-west). Larger places within reach include Gillingham (4 miles south), Chatham (6 miles south-west), Rochester (5 miles south-west), Rainham (5 miles south), Strood (6 miles south-west) and Luton (5 miles south-west).
Landmarks near Kingsnorth
For rail, the closest station is Gillingham (Kent) station, roughly 3.6 miles south-west. Well-known places in the area include Medway Maritime Hospital (4.2 miles south-west) and Upnor Castle (3.5 miles south-west). Green spaces nearby include Bishop Saltings.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Clear growth from the base of walls and joints
- Make sure movement joints aren’t pointed over
- Wash walls gently around the sealant
- Check the sealant is paintable before painting near it
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
How the visit works
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take a few hours to a few days, depending on the length of joint and the access. Somewhere like Kingsnorth needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Clear items away from the joints we’re working on
- Keep children and pets away from the work area
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
We quote each job on its own. Just call 0345 464 0079 or email us with the details, and pictures are welcome.
Advice
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- The amount of work
- Any mould that needs treating
- Access and height
- The old material and how stubborn it is
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, phone 0345 464 0079 or drop us an email for an honest opinion and a quote.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Whether it’s a home or a business
- Any access issues, like height or stairs
- The address or postcode of the job
- Whether it has been sealed before
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you are ready, phone 0345 464 0079 or email us.
How the job changes by surface
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best in all weathers.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
Places near Kingsnorth
Also in Kingsnorth
For landlords and businesses
For anyone letting property in or around Kingsnorth, several properties can be quoted together. Just tell us the addresses and what each one needs.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
Your questions about external mastic in Kingsnorth
Will you come out to Kingsnorth?
Yes. Kingsnorth is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Gillingham (Kent) station?
Yes. We work for letting agents and landlords as well as homeowners. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Why is there a gap in my brick wall?
Brickwork, render and cladding all move a little, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Is there any odour?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin, matched as closely as the range allows.
Are you fully insured?
Yes, we are fully insured for every job we do.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses and we’re fully insured.
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.