Kent · England
Shalmsford Street External Mastic
Movement joints in Shalmsford Street need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Plants rooting in failed movement joints
- Rigid filler in a joint that should flex
- Failed sealant between panels on a façade
What sealant work can’t fix
Sealant isn’t the answer to every problem, and we’ll tell you before any work starts. Sealant won’t put right:
- Cracks in the bricks or render themselves, away from the joints
- Subsidence or other structural problems
- Failed render or damaged cladding panels
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Façade panels
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
External mastic for homes and businesses in Shalmsford Street
Low-level joints can generally be done from the ground. For joints higher up, give us some details of the building and we will confirm what’s needed to reach them safely. We work on façade panels, copings & trims and render & cladding joints, and people most often call us about sealant that has lost its bond to the brick or render and failed seals between different materials.
Outbuildings, garages and conservatories around homes in places like Shalmsford Street 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.
Your job is guaranteed for a year, as with all our work.
- Location
- Shalmsford Street (CT4)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Also near Shalmsford Street
Other services in Shalmsford Street
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render near the open joint, so the damage spreads beyond the joint. Homes in smaller places like Shalmsford Street can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in Shalmsford Street
- One-year guarantee on every job
- Quality sealants from Arbo and Everbuild
- Tidy, careful work
- 180+ five-star Google reviews
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Tell anyone working on the walls about the movement joints
- Avoid pressure-washing directly into sealant joints
- Act on the first splits you see
- Leave the joints unpainted unless we’ve said otherwise
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead over time.
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.
Shalmsford Street questions
Do you work for landlords with property near Chartham station?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Is Shalmsford Street within the area you cover?
Yes. Shalmsford Street 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.
Will it make a mess?
No. The area is protected while we work and cleaned up afterwards.
How long should I leave it?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint before we leave.
When will the joints need doing again?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Every job carries our one-year guarantee.
What’s an expansion joint in brickwork?
Walls move with heat, cold and moisture, so long walls have planned gaps to take that movement. The gap is sealed with a flexible sealant over backing rod.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
What happens on the day
On the day, we look over the joints with you first. We protect the surfaces around the joints before any work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Parking around Shalmsford Street is usually easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Tell us about access, such as stairs, a lift or high-level joints
- Clear the area around the work
Get a quote
Every job is quoted individually. Simply call 0345 464 0079 or email us and describe the job and send photos if you have them.
Related advice
Surface by surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant so neither cracks the other.
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
How we quote for external mastic
The price is agreed before any work begins. It’s based on:
- The amount of work
- Whether the work is at height
- The number of rooms or windows
- Working hours on commercial sites
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
You don’t need to know the technical terms. It helps if you can tell us:
- What’s wrong with the joints now
- Where the job is, and your postcode
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
For external mastic in Shalmsford Street, phone 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.
Outside joints around Shalmsford Street
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Chartham Primary School? Then its movement joints, gutters and trims need looking after like any other building’s. If you live in an older home near Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain. If you let a flat or house near Chartham station, outside joints that have cracked can let damp into a rental, so check them between lets.
Shalmsford Street is about 3 miles south-west of Canterbury, in Kent. Anywhere in CT4, our applicators can take on external mastic. Our Kent coverage runs to 922 places, and Shalmsford Street is one of them. There’s also a page for Chelmsford, roughly 41 miles from Shalmsford Street.
Jobs for external mastic in CT4 is quoted and booked the same way as anywhere else. You will find streets such as Old Church Road, Pomfret Road and Summer Piece Grove, all of which we cover. Neighbouring places we cover for external mastic include Chartham (1 mile north), Mystole (1 mile west), Garlinge Green (1 mile south), Chartham Hatch (1 mile north) and Thanington (2 miles north-east). We also work in nearby towns such as Ashford (10 miles south-west), Canterbury (3 miles north-east), Dover (14 miles south-east), Sittingbourne (14 miles north-west), Folkestone (13 miles south-east) and Whitstable (7 miles north).
Near you in Shalmsford Street
Around Shalmsford Street, our work takes us to homes and buildings near The Artichoke Inn and Broadham Down. Shalmsford Street’s nearest station is Chartham station, roughly 0.5 miles north. Well-known places in the area include Chilham Castle (2.6 miles west) and Whitefriars Shopping Centre (3.3 miles north-east). Not far away are Blean Woods RSPB Reserve.