Kent · England
External Mastic in Stockbury
Sealing brickwork movement joints, render, cladding and façade joints for Stockbury, backed by a one-year guarantee. Ask us for a quote.
- Cracked joints where brick meets render or frames
- Plants rooting in failed movement joints
- Old sealant gone brittle and cracked
External mastic in Stockbury
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the line blends in. We work on concrete & block, brickwork movement joints and render & cladding joints, and common reasons people get in touch are joints where the bead has come unstuck and brick movement joints where the sealant has split.
External sealant needs dry, clean surfaces, so work around Stockbury is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Where
- Stockbury (ME9)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
A little care helps the new joints last. We recommend:
- Wash walls gently around the sealant
- Leave the joints unpainted unless we have said otherwise
- Tell anyone working on the walls about the movement joints
- Never let anyone fill a movement joint with mortar
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Small splits are the time to act. At that stage it’s a simple cut out and reseal.
How the job changes by surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so its sealant has to stay flexible.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
Stockbury buildings and the weather
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around St Mary Magdalene Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Stockbury is about 4 miles west of Sittingbourne, in Kent. Every kind of property in Stockbury can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Stockbury is one of 922 towns and villages in Kent we cover for external mastic. We also work in Chelmsford, about 29 miles from Stockbury.
All of ME9 is within our area for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on The Street, Hill Green Road and Harrow Court or a nearby road, we can help. Neighbouring places we cover for external mastic include Yelsted (1 mile west), South Green (1 mile south-east), Hartlip (1 mile north), Lower Hartlip (1 mile north) and Danaway (2 miles north-east). We also work in nearby towns such as Maidstone (6 miles south-west), Sittingbourne (4 miles east), Gravesend (13 miles north-west), Faversham (11 miles east), Northfleet (15 miles north-west) and Minster (9 miles north-east).
Near you in Stockbury
Typical jobs here are in homes near The Three Squirrels pub and Stockbury Hill Wood. For rail, the closest station is Newington station, about 2.2 miles north-east of the centre. A little further out are Bayford Court (4.6 miles east) and KIMS hospital (4.5 miles south-west). Green spaces nearby include Detling Hill.
What affects the quote in Stockbury
We quote each job individually. These are the things that affect it:
- How many areas need sealing
- How easy the joints are to reach
- Working hours on commercial sites
- Mould in or behind the old joints
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- Whether it’s a home or a business
- What’s wrong with the joints now
- How many joints, rooms or windows are involved
- A few pictures by email, if you can
If you are in Stockbury and need external mastic, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Landlords, agents and businesses in Stockbury
We work for letting agents and landlords as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
Common questions in Stockbury
I let a flat near Newington station. Can you help?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Is Stockbury in your area for external mastic?
Yes. Our work covers London and the South East, and Stockbury is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Where do you work from?
We’re based in Crawley, and we cover South East England, London and all of Scotland.
Is it OK to fill a movement joint with cement?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Are you insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
When to call us in Stockbury
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
The most common problems we see are:
- Joints pointed up with cement by mistake
- Failed sealant between panels on a façade
- Joints with sealant missing in places
- Cracked joints where brick meets render or frames
If you let a flat or house near Newington station, outside joints that have cracked can let damp into a rental, so check them between lets.
Comparing quotes
- How long the guarantee is
- When the joint can take water or movement
- What happens if they find a problem under the old sealant
- How the colour is chosen
What we do, step by step
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the job takes anything from a few hours to several days, depending on the building for a typical job. For a village or hamlet like Stockbury, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Tell us if parking is tricky
- Tell us about any water getting in
- On commercial sites, let us know about site rules
How to get a quote
There’s no standard price list. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or email us.
Read more
Towns and villages near Stockbury
More services for Stockbury
Can I do it myself?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.