Essex · England
Monk Street External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Monk Street, with a 12-month guarantee on every job. Ask us for a quote.
- Water getting into walls through failed joints
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
About our external mastic in Monk Street
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two where a rigid filler would soon crack. If you are dealing with joints where the bead has come unstuck and failed seals between different materials, we can put it right, on render & cladding joints, façade panels and concrete & block alike.
Around Monk Street, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Every job comes with our 12-month guarantee, wherever you are in Essex.
- Where
- Monk Street (CM6)
- Wider area
- Essex
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Common problems we fix in Monk Street
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall.
Look out for these signs:
- Sealant that has lost its bond to the brick or render
- Water getting into walls through failed joints
- Brick movement joints where the sealant has split
- Weathered mastic that no longer stretches
Rented homes near Stansted Airport station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Before you book anyone
- Who turns up on the day
- Is VAT in the price?
- What the cure time is
- Is the old sealant removed completely?
What happens on the day
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and clear up. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Monk Street, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- 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
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
Ask for a quote
Need a quote? Please phone 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
Places near Monk Street
Other services in Monk Street
Monk Street questions
Will you come out to Monk Street?
Yes. Monk Street is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Stansted Airport station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Is there any odour?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
Do you work at height?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher work, tell us about the building and we’ll confirm what’s needed.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or drop us an email.
Is it OK to seal over old sealant?
No. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Where are you based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Leave it or put it right?
A failed movement joint lets water into the wall and can run behind render or cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. Where a wall is exposed, as many are in small places like Monk Street, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Why book with us
- A sealant colour to suit the surroundings
- White, clear, grey or coloured to suit, where the product allows
- We never seal over old sealant
- 20+ years of sealant experience
Take a look at our cost guide and our reviews.
External mastic in Monk Street: local notes
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Horham Hall (about 1.5 miles west) are a reminder that the area around Monk Street 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.
Historic houses such as Horham Hall, about 1.5 miles west, show how far back building around Monk Street goes.
Monk Street is about 7 miles south-east of Saffron Walden, in Essex. Across the CM6 area, we can carry out external mastic at your property. Monk Street is one of 644 places in Essex where we work. Our Chelmsford page covers work nearby, about 15 miles away.
Our applicators cover all of the CM6 postcode area for external mastic. If you need external mastic at a property on Folly Mill Lane and Monk Street or a nearby road, our applicators can take on the job. Neighbouring places we cover for external mastic include Sibley's Green (1 mile south-east), Thaxted (1 mile north), Duton Hill (1 mile south-west), Bardfield End Green (1 mile north-east) and Cutlers Green (2 miles north-west). Further out, we also cover Chelmsford (15 miles south-east), Braintree (10 miles east), Harlow (15 miles south-west), Witham (15 miles south-east), Saffron Walden (7 miles north-west) and Halstead (13 miles east).
Landmarks near Monk Street
Locally, jobs take us to homes and businesses close to Greyhound Public House and the streets around them. The nearest railway station is Stansted Airport station, about 4.7 miles south-west of the centre. Other landmarks nearby include Little Easton Moat (3.4 miles south). Open spaces near Monk Street include West Wood.
Can I do it myself?
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
What affects the cost of external mastic
There’s no set price list. What we look at:
- Whether the work is at height
- Whether there’s mould to deal with
- How much old sealant there is and how hard it is to remove
- When we can work, for business premises
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- What’s wrong with the joints now
- The address or postcode of the job
- Pictures of the joints, sent by email
- Whether it’s a home or a business
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Damp that is not coming from the joint
- Structural movement, which needs a surveyor or engineer
- Failed render or damaged cladding panels
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly.
Surfaces we seal
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
- Concrete & block
- Façade panels
What the job involves on each surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so its sealant has to stay flexible.
Render joints
Water behind render can lead to blown patches. Resealing the joints early keeps water out.