Kent · England
External Mastic in Upstreet
Problem with your movement joints in Upstreet? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Hard, crazed mastic that has stopped moving
- Brick movement joints where the sealant has split
- Plants rooting in failed movement joints
External mastic in Upstreet
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we’ll confirm what’s needed to reach them safely. We work on copings & trims, façade panels and render & cladding joints, and the jobs we see most are water getting into walls through failed joints and old sealant gone brittle and cracked.
In a village or hamlet like Upstreet, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
All of our work is guaranteed for twelve months.
- Place
- Upstreet (CT3)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Your questions about external mastic in Upstreet
Can you help a landlord with a rental near Sturry station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Do you cover smaller places like Upstreet?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
What is a movement joint?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Do you guarantee your work?
Yes. All our work carries a one-year guarantee.
How long does external mastic take?
Typically it takes a few hours to a few days, depending on the length of joint and the access. Larger jobs naturally take longer, and we’ll tell you how long to expect.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Other services in Upstreet
Outside joints around Upstreet
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Church of St Mary the Virgin, the joints between older walls, newer extensions and the roofline need a sealant that can move. If you look after a building such as Chislet Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Upstreet is about 4 miles south-east of Herne Bay, in Kent. Homes, rented property, offices and hotels in Upstreet can book us for external mastic. The work is guaranteed for a year. Upstreet is one of 922 towns and villages in Kent we cover. There’s also a page for Chelmsford, roughly 42 miles from Upstreet.
Postcode districts we cover here for external mastic: CT3. Whether your property is on St Mary's Gardens, Becketts Wood and Grove Ferry Hill or a nearby road, we can help. Other places close to Upstreet include Grove (1 mile south), West Stourmouth (2 miles east), Sarre (2 miles north-east), Preston (2 miles south-east) and East Stourmouth (2 miles east). Within a short drive, we also cover Canterbury (6 miles south-west), Margate (9 miles north-east), Dover (14 miles south), Ramsgate (9 miles east), Broadstairs (10 miles east) and Whitstable (8 miles west).
Near you in Upstreet
Typical jobs here are in homes near Grove Ferry Picnic Area, Spires Academy and The Grove Ferry Inn and the streets around them. The nearest railway station is Sturry station, roughly 3.8 miles south-west of the centre. Nearby you’ll also find St Martins Hospital (5.2 miles south-west). For a walk, there’s West Blean and Thornden Woods.
When to call us in Upstreet
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Signs it’s time to call us include:
- Panel joints letting water in
- Sealant that has lost its bond to the brick or render
- Failed seals between different materials
- Rain getting behind render or cladding at a joint
Letting a property close to Sturry station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Before you book anyone
- Who does the work, and how experienced they are
- Whether they’re fully insured
- When the joint can take water or movement
- What happens if they find a problem under the old sealant
What we do, step by step
At the end, we look at the finished work together 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 how much there is to do. In a small place like Upstreet, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know about parking restrictions
- Mention any sign-in or site rules at work premises
Getting a quote
We quote each job on its own, so start by telling us what you need. Just phone 0345 464 0079 or send us an email with the details, and pictures are welcome.
Related advice
Leave it or put it right?
Resealing a run of joints in one go is normally better than patching one at a time. They’ve weathered the same way, and access only has to be arranged once. In a small place like Upstreet, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Combining jobs into one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will send you a clear quote for the lot.
Why Upstreet clients choose us
- Tidy, careful work
- A sealant colour to suit the surroundings
- Sanitary silicone with an anti-fungal additive in wet areas
- A 12-month guarantee on all work
Read what affects the cost and our reviews.
How we quote for external mastic
Jobs vary more than people expect. What affects the quote:
- Whether old sealant or filler has to be cut out
- Any working-time requirements on site
- Which sealant suits the joint
- The amount of work
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Call for a quick quote and we’ll explain what it covers.
What we need to know
What to tell us when you ask for a quote:
- What’s wrong with the joints now
- The address or postcode of the job
- Pictures of the joints, sent by email
- How we’d reach the joints
For a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. We will give you a clear price before any work starts.
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
When it isn’t the sealant
A few problems are outside what sealant work can do:
- Failed render or damaged cladding panels
- Subsidence or other structural problems
- Cutting new joints into brickwork, which is building work rather than sealant work
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
Where we work in Upstreet
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Joints between brick and frames
Surface by surface
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible year round.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it, or one the system allows. Tell us what the building has when you get in touch.