Kent · England
External & façade joints in Coombe, Kent
External mastic in Coombe from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Joints pointed up with cement by mistake
- Failed sealant between panels on a façade
- Moss and dirt in joints with no sealant left
How we handle external mastic in Coombe
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a matching colour. We work on joints between brick and frames, brickwork movement joints and façade panels, and common reasons people get in touch are moss and dirt in joints with no sealant left and movement joints filled with mortar instead of sealant.
In a village or hamlet like Coombe, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
Every job comes with our 12-month guarantee, wherever you are in Kent.
- Location
- Coombe (CT3, CT13)
- Region
- Kent
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What the job involves on each surface
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant.
Cladding and façade panels
Cladding and façade panels are usually separated by sealed joints. We reseal them with a sealant suited to the panel material.
What we do, step by step
At the end, we look at the finished work together. 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. Somewhere as small as Coombe, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- 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.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Let us know about parking restrictions
- Move anything stored near the joints
- Mention if the joints have been sealed before
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or send us an email.
Read more
Common problems we fix in Coombe
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall.
Common reasons people contact us include:
- Brick movement joints where the sealant has split
- Weathered mastic that no longer stretches
- Failed seals between different materials
- Sealant pulling away from one side of the joint
For an older house near a landmark such as Church of St Nicholas, an extension built onto an older house moves differently, and the joint between them takes the strain.
Before booking anyone
- What guarantee comes with the work
- What preparation is included
- Are they insured?
- When the joint can take water or movement
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Get split or bare joints resealed while the damage is small
- Keep water from gutters off the wall
- Keep high-pressure jets off the joints
- Walk round the building once a year and look at the joints
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
Also near Coombe
Also in Coombe
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost, so the damage spreads beyond the joint. Older cottages and farmhouses around Coombe can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
What you get with us
- Old sealant always removed completely
- Colour agreed with you before we start
- Neat joints and a tidy finish
- Every job guaranteed for a year
Take a look at our cost guide or our reviews.
Coombe: your questions answered
Can you help a landlord with a rental near Sandwich 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 drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Is Coombe in your area for external mastic?
Yes, Coombe is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we will send you a clear quote.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
How much does external mastic cost in Coombe?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we will talk you through it.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done.
What’s an expansion joint in brickwork?
A vertical gap in a long brick wall is generally a movement joint. It lets the bricks expand without cracking and needs a flexible seal, not mortar.
Are you insured?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
Is there any odour?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
Landlords, agents and businesses in Coombe
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Outside joints around Coombe
With historic houses such as Goodnestone Park (about 3.5 miles south-west) nearby, there’s older building stock in the area around Coombe as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. Compared with the north and west, the South East gets less rain, 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 Ash Cartwright and Kelsey Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s. If you let a flat or house near Sandwich station, outside joints that have cracked can let damp into a rental, so check them between lets.
Coombe is about 6 miles north-west of Deal, in Kent. Across the CT3 area, our applicators can take on external mastic. Our Kent coverage runs to 922 places, Coombe among them. Our Chelmsford page covers work nearby, about 47 miles away.
Here we cover the CT3 and CT13 postcode area for external mastic. We cover properties on Coombe Lane, Saunders Lane and Langdon Avenue. Neighbouring places we cover for external mastic include Flemings (1 mile south-west), Ash (1 mile north-west), Weddington (1 mile north), Guilton (1 mile west) and Hammill Park (1 mile south). Within a short drive, we also cover Canterbury (9 miles west), Margate (8 miles north-east), Dover (9 miles south), Folkestone (14 miles south-west), Ramsgate (7 miles north-east) and Broadstairs (9 miles north-east).
What’s near Coombe
Locally, jobs take us to homes and businesses close to The Chequer Inn and Sandwich Technology School, among other places. Coombe’s nearest station is Sandwich station, about 2.1 miles east. Well-known places in the area include White Mill (1.6 miles east). Open spaces near Coombe include Monk's Wall nature reserve.
When something else is needed
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- Walls that need new movement joints cut into them
- Render that’s blown, hollow or coming away
- Cracks in the bricks or render themselves, away from the joints
If in doubt, call 0345 464 0079 or email us and we will say what we think.
Where we work in Coombe
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Façade panels