Kent · England
External Mastic in Teynham
Sealing brickwork movement joints, render, cladding and façade joints for householders, landlords and businesses in Teynham. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Joints pointed up with cement by mistake
- Gaps where render, brick and frames meet
- Sealant pulling away from one side of the joint
External mastic in Teynham
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint does not stand out. Common call-outs are for joints pointed up with cement by mistake and gaps where render, brick and frames meet, across façade panels, joints between brick and frames and brickwork movement joints.
Outbuildings, garages and conservatories around homes in places like Teynham 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.
Whatever the size of the job, you get the same one-year guarantee in Teynham and across Kent.
- Location
- Teynham (ME9)
- Region
- Kent
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Can I do it myself?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Leave it or put it right?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. Around Teynham, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
Why choose Mr Mastic in Teynham
- Quality sealants from Arbo and Everbuild
- White, clear, grey or another colour, product permitting
- We leave the area clean and tidy
- Domestic, commercial and hotel work
See what affects the cost and what customers say.
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Structural movement, which needs a surveyor or engineer
- Damp that is not coming from the joint
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before booking.
Joints and surfaces we work on
- Joints between brick and frames
- Concrete & block
- Copings & trims
- Façade panels
- Brickwork movement joints
- Render & cladding joints
Landlords, agents and businesses in Teynham
We work for letting agents and landlords as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
We also work for property managers and facilities teams in Teynham and across Kent. We can quote a run of properties together.
Walls and rooflines in Teynham
Teynham is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Historic houses like Belmont House and Gardens (about 4.4 miles south-east) are a reminder that the area around Teynham 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.
Letting a property close to Teynham station? Then outside joints that have cracked can let damp into a rental, so check them between lets. In the older streets around Church of St Mary, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Teynham is about 3 miles east of Sittingbourne, in Kent. For external mastic in and around Teynham, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover Kent from our Crawley base, Teynham included. We cover 922 towns and villages across Kent. You can also see our page for Chelmsford, about 31 miles away.
Here we cover the ME9 postcode area for external mastic. You will find streets such as Station Road, London Road and Belle Friday Close. If you’re just outside Teynham, we cover Teynham Street (1 mile north-east), Deerton Street (1 mile east), Norton Ash (1 mile south-east), Lewson Street (1 mile south-east) and Tickham (1 mile south). We also work in nearby towns such as Maidstone (13 miles west), Ashford (13 miles south), Canterbury (13 miles east), Sittingbourne (3 miles west), Whitstable (10 miles east) and Faversham (4 miles east).
What’s near Teynham
Locally, jobs take us to homes and businesses close to Sittingbourne Community College and The Dover Castle pub and the streets around them. There’s a railway station in Teynham itself: Teynham station. A little further out are Bayford Court (2.8 miles west) and Sittingbourne Heritage Museum (2.7 miles west).
What else we do in Teynham
Common problems we fix in Teynham
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
Signs it’s time to call us include:
- Sealant that has lost its bond to the brick or render
- Damp patches traced to an open external joint
- Joints pointed up with cement by mistake
- Hard, crazed mastic that has stopped moving
Managing a site like Teynham Parochial Church of England Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Questions to ask before you book
- Whether they’re fully insured
- Whether you can choose the colour
- Who does the work, and how experienced they are
- What guarantee comes with the work
Common questions in Teynham
I let a flat near Teynham station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Does the coastal weather in Teynham affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
How long will you be here?
Most jobs take a few hours for a handful of joints, longer for a whole elevation, including preparation and clearing up. We’ll confirm how long when we quote.
How do I get a quote for external mastic in Teynham?
Size, access and the old material all affect the cost. Call for a quick quote and we will talk you through it.
Can you reach joints on upper floors?
It depends on the building. Send us photos and a rough idea of the height and we’ll confirm how they can be reached safely.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. We’ll talk through colour options before any work starts from the range available.
Why is there a gap in my brick wall?
Walls move with heat, cold and moisture, so long walls have planned gaps to take that movement. It’s closed with backing rod and a flexible sealant.
How it works
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on the size of the job. In a smaller place like Teynham, 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.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Related advice
How the job changes by surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. The sealant is chosen with that in mind.