Essex · England
External Mastic in Chipping Ongar
Sealing brickwork movement joints, render, cladding and façade joints for Chipping Ongar, backed by a 12-month guarantee. Ask us for a quote.
- Weathered mastic that no longer stretches
- Failed seals between different materials
- Rigid filler in a joint that should flex
Do you need external mastic in Chipping Ongar?
Some movement joints have been pointed up with mortar by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
The most common problems we see are:
- Joints with sealant missing in places
- Failed sealant between panels on a façade
- Moss and dirt in joints with no sealant left
- Sealant that has lost its bond to the brick or render
For site and facilities teams at buildings such as Chipping Ongar Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Before booking anyone
- What happens if they find a problem under the old sealant
- Whether VAT is included
- How long to leave it before use
- What preparation is included
External mastic in Chipping Ongar, done properly
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. We work on brickwork movement joints, render & cladding joints and façade panels, and common reasons people get in touch are joints with sealant missing in places and cracked joints where brick meets render or frames.
Outbuildings, garages and conservatories around homes in places like Chipping Ongar add more joints to look after. Leaks normally start at a gutter end, a garage door frame or where an extension meets the house.
Every job comes with our 12-month guarantee.
- Location
- Chipping Ongar (CM5)
- Wider area
- Essex
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why it’s worth doing now in Chipping Ongar
Sealing over the top of old mastic does not hold for long. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. In a smaller place like Chipping Ongar, wherever a wall is exposed, a failed outside joint is a real source of damp. 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. 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 us?
- A 12-month guarantee on all work
- Neat joints and a tidy finish
- Rated 4.9 stars on Google
- We agree the colour with you first
Your questions about external mastic in Chipping Ongar
Will you come out to Chipping Ongar?
Yes. Chipping Ongar is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
What guarantee comes with external mastic in Chipping Ongar?
All our work, in Chipping Ongar and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Where are you based?
Mr Mastic is based in Crawley. We cover Chipping Ongar and the rest of Essex, along with the rest of our area.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Can you seal joints between two different materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. The sealant is matched to both sides.
Can you match the colour of my brickwork?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We choose the closest to your brick or render so it does not stand out.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We will tell you what we’re using and why.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Ask before painting over external sealant
- Show decorators and builders where the movement joints are
- Wash walls gently around the sealant
- Keep movement joints as flexible joints, not mortar
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
What the job involves on each surface
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that’s happened, we rake it out and reseal it properly if the joint can be cleared.
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
What sealant work can’t fix
We won’t take on work that will not last, so here’s what sealant cannot put right:
- Failed render or damaged cladding panels
- Damp that is not coming from the joint
- Subsidence or other structural problems
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Joints between brick and frames
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Façade panels
Also near Chipping Ongar
Also in Chipping Ongar
Outside joints around Chipping Ongar
Historic houses like Hill Hall (about 4.4 miles south-west) are a reminder that the area around Chipping Ongar has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. 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 United Reformed Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Chipping Ongar is about 6 miles north-west of Brentwood, in Essex. Anywhere in CM5, our applicators can take on external mastic. Across Essex, we cover 644 places, and Chipping Ongar is one of them. Chelmsford is on our list too, around 11 miles away.
All of CM5 is covered for external mastic. If you need external mastic at a property on High Street, Lavender Mews and Stanley Place or a nearby road, our applicators can take on the job. Main roads around Chipping Ongar include the A128, so getting to you is simple. Neighbouring places we cover for external mastic include Greensted (1 mile west), Shelley (1 mile north), High Ongar (1 mile east), Greensted Green (2 miles west) and Norton Mandeville (2 miles north-east). Larger places within reach include Chelmsford (11 miles east), Basildon (13 miles south-east), Harlow (7 miles north-west), Brentwood (6 miles south-east), Billericay (9 miles south-east) and Loughton (9 miles south-west).
Around Chipping Ongar
We work in homes and buildings around The Ongar Academy and The Royal Oak pub, among other places. Other landmarks nearby include Willingale Doe (4.5 miles north-east) and St. Margaret's Hospital (5.2 miles west). Green spaces nearby include Gernon Bushes.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
The process
The work is kept neat and contained to the area we are working on. The job usually takes a few hours to a few days, depending on the length of joint and the access, and we tell you how long to leave it before we go. Parking around Chipping Ongar is normally 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.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Mention any sign-in or site rules at work premises
- Mention if the joints have been sealed before
Ask for a quote
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or drop us an email and describe the job and send pictures if you have them.