Essex · England
Kelvedon Hatch External Mastic
Professional external mastic in and around Kelvedon Hatch, with old sealant always removed completely and a 12-month guarantee.
- Old sealant gone brittle and cracked
- Failed seals between different materials
- Failed sealant between panels on a façade
Different surfaces, different methods
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind.
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joints work hard every day. We choose the product to suit.
How we handle external mastic in Kelvedon Hatch
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where mortar or filler would crack. Typical jobs include brick movement joints where the sealant has split and leaking joints around cladding and façade panels, across copings & trims, joints between brick and frames and render & cladding joints.
Outside joints can only be sealed when they’re dry, so work in Kelvedon Hatch is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Place
- Kelvedon Hatch (CM15, CM14)
- Wider area
- Essex
- Cover
- A year, on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Outside joints around Kelvedon Hatch
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Ingatestone Hall (about 5 miles east) are a reminder that the area around Kelvedon Hatch has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
For landlords with property near Shenfield station, split movement joints are easy to miss on a rental until damp shows inside. Managing a site like Kelvedon Hatch Community Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
Kelvedon Hatch is about 3 miles north-west of Brentwood, in Essex. Anywhere in CM15, we cover external mastic for homes and businesses. Kelvedon Hatch is one of 644 places in Essex where we work for external mastic. You can also see our page for Chelmsford, roughly 10 miles from Kelvedon Hatch.
Postcode districts we cover here for external mastic: CM15 and CM14. Local streets include Church Road, Swan Lane and The Finchingfields, and we cover them all. Other places close to Kelvedon Hatch include Doddinghurst Common (1 mile south), Navestock Side (1 mile south-west), Bentley (1 mile south), Hook End (1 mile north-east) and Stondon Massey (1 mile north-east). Within a short drive, we also cover Chelmsford (10 miles north-east), Basildon (10 miles south-east), Harlow (10 miles north-west), Brentwood (3 miles south-east), Billericay (7 miles east) and Rayleigh (15 miles east).
Local landmarks in Kelvedon Hatch
In Kelvedon Hatch, that means homes and buildings near The Shepherd Public House and the streets around them. The nearest railway station is Shenfield station, about 3.4 miles south-east. Well-known places in the area include Brentwood Community Hospital (3.3 miles south-east). Green spaces nearby include Thorndon Park.
Quotes for external mastic in Kelvedon Hatch
We do not publish a price list. What we look at:
- How easy the joints are to reach
- The number and length of the joints
- Which sealant suits the joint
- How many areas need sealing
A few things move the cost up or down: 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.
Helping us quote
When you call or email, these details help:
- The type of property
- Photos by email, if that is easy
- How we’d reach the joints
- How many joints, rooms or windows are involved
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or drop us an email.
Do you need external mastic in Kelvedon Hatch?
If plants are growing out of a joint, the sealant has normally failed or was never there. Dirt and roots then trap moisture in the joint and speed up the damage.
Signs it’s time to call us include:
- Brick movement joints where the sealant has split
- Rain getting behind render or cladding at a joint
- Sealant pulling away from one side of the joint
- Panel joints letting water in
In the older streets around New Church of St Nicholas, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What your quote should include
- Which sealant they’ll use, and why
- Is VAT in the price?
- How much experience the applicator has
- Are they insured?
Keeping the joints in good condition
After the cure time, these simple habits help:
- Keep movement joints as flexible joints, not mortar
- Show decorators and builders where the movement joints are
- Avoid pressure-washing directly into sealant joints
- Fix overflowing gutters above sealed joints
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Once a joint can’t move, the wall finds another way, usually as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Landlord and commercial work in Kelvedon Hatch
For anyone letting property in or around Kelvedon Hatch, several properties can be quoted together. Send us the addresses and the work at each.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Kelvedon Hatch questions
Do you cover Kelvedon Hatch for external mastic?
Yes. We work across London and the South East, and Kelvedon Hatch is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Is Kelvedon Hatch within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme.
Can you quote for more than one area?
Yes, and it often makes sense. Doing several areas at once is generally more efficient.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
Can you seal joints between two different materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
How long will you be here?
As a guide, most jobs take a few hours for a handful of joints, longer for a whole elevation. Bigger jobs take longer, and we will tell you how long to expect.
What we cannot put right
A few problems are outside what sealant work can do:
- Cracked brickwork or render that needs a builder or plasterer
- Movement that’s more than a sealant joint can take
- Render that is blown, hollow or coming away
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Surfaces we seal
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
- Concrete & block
The process
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the building. Somewhere like Kelvedon Hatch needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about stairs, lifts or work at height
- For business premises, tell us about site rules or sign-in
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.