Essex · England
External Mastic in Kelvedon
External mastic for Kelvedon, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Moss and dirt in joints with no sealant left
- Movement joints with cracked, split or missing sealant
- Sealant pulling away from one side of the joint
What the job involves on each surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. We reseal their joints with backing rod and a flexible product.
External mastic in Kelvedon
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. Typical jobs include gaps where render, brick and frames meet and failed sealant between panels on a façade, on joints between brick and frames, copings & trims and brickwork movement joints.
Homes around Kelvedon range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Kelvedon (CO5)
- Wider area
- Essex
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Places near Kelvedon
Other services in Kelvedon
How it works
When we arrive, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before we start. The work normally takes a few hours for a handful of joints, longer for a whole elevation. A visit to Kelvedon is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Let us know about parking restrictions
- Clear the area around the work
- Mention any tricky access
Get a quote
Need a quote? Please ring 0345 464 0079 or email us with a few details. We’ll explain what we’d do and give you a clear quote before work begins.
Related advice
Kelvedon buildings and the weather
Historic houses like Layer Marney Tower (about 4.2 miles east) are a reminder that the area around Kelvedon has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. London and the South East are among the drier parts 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 Parish Church of St Mary, the joints between older walls, newer extensions and the roofline need a sealant that can move. Managing a site like Kelvedon St Mary's Church of England Primary Academy? Then its movement joints, gutters and trims need looking after like any other building’s.
Kelvedon is about 4 miles north-east of Witham, in Essex. Jobs in Kelvedon get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Kelvedon is one of 644 towns and villages in Essex where we work. We also work in Chelmsford, around 11 miles away.
All of CO5 is covered for external mastic. Local streets include High Street, Church Road and Station Road, all of which we cover. Close by, we work in Feering (1 mile north-east), Stocks Green (2 miles north-east), Windmill Hill (2 miles south-east), Messing (2 miles east) and Skye Green (2 miles north). Further out, we also cover Colchester (9 miles north-east), Chelmsford (11 miles south-west), Braintree (7 miles north-west), Maldon (8 miles south), Witham (4 miles south-west) and Camulodunum (8 miles north-east).
Landmarks near Kelvedon
Typical jobs here are in homes near The George Inn, Parish Church of All Saints and Thurstable School Sports College and Sixth Form Centre. Kelvedon has its own railway station: Kelvedon station. Well-known places in the area include Laundry & Mangle Museum (2.6 miles north-west). For a walk, there’s Tiptree Heath Nature Reserve.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Act on the first splits you see
- Deal with leaking gutters that soak the joints below
- Show decorators and builders where the movement joints are
- Check external joints each spring
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
Do you need external mastic in Kelvedon?
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
People generally contact us after spotting one of these:
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
- Joints with sealant missing in places
- Old sealant gone brittle and cracked
For landlords with property near Kelvedon station, split movement joints are easy to miss on a rental until damp shows inside.
Before you book anyone
- How the colour is chosen
- Are they insured?
- How much experience the applicator has
- Whether they seal over old material or remove it
What affects the quote in Kelvedon
The price is agreed before any work begins. It’s based on:
- Whether old sealant or filler has to be cut out
- The number and length of the joints
- Whether the work is at height
- Which sealant suits the joint
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will explain what it covers.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- If someone has resealed it before
- The rough size of the job
- What’s wrong with the joints now
- Access, such as stairs, a lift or height
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
FAQs for Kelvedon
Is Kelvedon within the area you cover?
Yes, Kelvedon is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
I let a flat near Kelvedon station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you use backing rod?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
Do you remove the old sealant?
Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Do you have insurance?
Yes. Full insurance covers our work.
Is there a guarantee?
Yes. Each job is guaranteed for twelve months, wherever you are.
What should I tell you?
Only a few details: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or email us.
When it isn’t the sealant
New sealant can’t fix everything, and we’d rather say so up front. Sealant will not put right:
- Render that is blown, hollow or coming away
- Rising or penetrating damp from elsewhere in the wall
- Cracked brickwork or render that needs a builder or plasterer
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
What we seal
- Concrete & block
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
What happens if it’s left?
Sealing over the top of old mastic does not hold for long. New sealant doesn’t bond well to old, weathered sealant, so the old joint is cut out fully first. Around Kelvedon, 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.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Why choose Mr Mastic in Kelvedon
- Approved under the ARBOMaster scheme
- Colour agreed with you before work begins
- Neat joints and a tidy finish
- Trusted Arbo and Everbuild sealants
Read what affects the cost or what customers say.