Medway · England
External Mastic in Halling
External mastic across Halling and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Moss and dirt in joints with no sealant left
- Joints pointed up with cement by mistake
- Rain getting behind render or cladding at a joint
Work for landlords, hotels and businesses
We work for letting agents and landlords as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
We also work for property managers and facilities teams in Halling and across Medway. We can quote a run of properties together, and we’re fully insured for the work.
How we handle external mastic in Halling
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. We work on concrete & block, joints between brick and frames and render & cladding joints, and people most often call us about failed sealant between panels on a façade and sealant that has lost its bond to the brick or render.
In a village or hamlet like Halling, 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.
Your job is guaranteed for a year, as with all our work.
- Where
- Halling (ME2)
- Wider area
- Medway
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Quotes for external mastic in Halling
The price is agreed before any work begins. It takes into account:
- Access and height
- The type of sealant required
- The size of the job
- The number of rooms or windows
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or email us and we will talk you through it.
What to tell us for a quote
When you contact us, it’s useful to know:
- The type of property
- Any previous sealing or DIY work
- Pictures of the joints, sent by email
- The address or postcode of the job
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved and give you a clear price.
Halling buildings and the weather
With historic houses such as Starkey Castle (about 1 mile north-east) nearby, there’s older building stock in the area around Halling as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to Church of St John the Baptist include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant. Schools such as Halling Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Halling is about 3 miles south-west of Rochester, in Medway. Jobs in Halling get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Across Medway, we cover 68 places, and Halling is one of them. For nearby work, see our London page, about 25 miles away.
All of ME2 is within our area for external mastic, from the main roads to the quietest streets. You will find streets such as High Street, Kent Road and Essex Road. If you’re just outside Halling, we cover Wouldham (1 mile east), Upper Halling (1 mile south-west), North Halling (1 mile north), Holborough (1 mile south) and Peters Village (1 mile south-east). We also work in nearby towns such as Gillingham (6 miles east), Chatham (4 miles east), Rochester (3 miles north-east), Rainham (7 miles east), Strood (3 miles north-east) and Luton (4 miles east).
Local landmarks in Halling
Around Halling, our work takes us to homes and buildings near Holborough Marshes, The Homeward Bound pub and The Holmesdale School, among other places. There’s a railway station in Halling itself: Halling station. A little further out are St. Catherine's Hospital (3.4 miles north-east) and Rochester Castle (3.5 miles north-east). Open spaces near Halling include Blue Bell Hill and Ranscombe Farm.
Why deal with it now?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. Around Halling, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Combining jobs into one visit normally makes better use of the time than several visits. We’ll give you a clear quote for the lot.
Why choose Mr Mastic in Halling
- 20+ years of sealant experience
- We agree the colour with you first
- We never seal over old sealant
- ARBOMaster approved applicator
Take a look at what affects the cost and what customers say.
What sealant work cannot fix
In fairness, some problems need a different trade:
- Damp that is not coming from the joint
- Render that’s blown, hollow or coming away
- Walls that need new movement joints cut into them
If in doubt, ring 0345 464 0079 or email us and we will say what we think before you book.
Joints and surfaces we work on
- Copings & trims
- Façade panels
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Joints between brick and frames
Nearby places to Halling
What else we do in Halling
How the visit works
There’s no need to move everything out before we come, only the area right around the joints. Everything nearby is protected, and the job takes a few hours to a few days, depending on the length of joint and the access in most cases. Somewhere as small as Halling, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- For indoor joints, keep the area dry beforehand if you can
- Move anything stored near the joints
Getting a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Read more
Signs you need external mastic in Halling
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall.
Most people get in touch after spotting something like this:
- Sealant pulling away from one side of the joint
- Water getting into walls through failed joints
- Movement joints filled with mortar instead of sealant
- Weathered mastic that no longer stretches
If you let a flat or house near Halling station, outside joints that have cracked can let damp into a rental, so check them between lets.
Before booking anyone
- Whether you can choose the colour
- Whether they seal over old material or remove it
- How long the guarantee is
- Is VAT in the price?
Looking after it afterwards
So the new joints stay in good condition:
- Wash walls gently around the sealant
- Never let anyone fill a movement joint with mortar
- Get split or bare joints resealed while the damage is small
- Deal with leaking gutters that soak the joints below
Don’t paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established.
Common questions in Halling
Can you do external mastic in Halling?
Yes, Halling is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing, and we will send you a clear quote.
I let a flat near Halling station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
How long should I leave it?
Cure times vary by product and the conditions. Before we leave, we’ll tell you the cure time.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
What does external mastic cost?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or email us with a short description of the job.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
What is a movement joint?
Walls move with heat, cold and moisture, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.