Hertfordshire · England
Manuden External Mastic
We cover Manuden for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Joints where the bead has come unstuck
- Rain getting behind render or cladding at a joint
- Joints pointed up with cement by mistake
Aftercare tips
To keep the joints looking good and working properly:
- Avoid pressure-washing directly into sealant joints
- Ask before painting over external sealant
- Look over the joints every year, ideally after winter
- Act on the first splits you see
Only paint over the joint if we have confirmed the sealant can take paint. Paint can crack on a flexible joint and spoil the finish.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
External mastic in Manuden
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We strip the joint back and start again. We work on façade panels, copings & trims and concrete & block, and people most often call us about water getting into walls through failed joints and rigid filler in a joint that should flex.
Around Manuden, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water normally gets in, and they need the right sealant at the right depth.
Our work is backed for twelve months, in Manuden and everywhere else we cover.
- Where
- Manuden (CM23)
- Wider area
- Hertfordshire
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens on the day
Once we’re on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to several days, depending on the building. Somewhere like Manuden needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by walking round the building and agreeing the joints and the access.
- 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.
Getting ready for the visit
- Mention any parking rules near the property
- Let us know if you’ve seen damp or leaks
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
We do not publish a price list. Instead, we give you a clear quote for your job. To arrange one, ring 0345 464 0079 or drop us an email.
Read more
What affects the cost of external mastic
Call for a quick quote. The main things that affect it are:
- When we can work, for business premises
- Access and height
- Mould in or behind the old joints
- The amount of work
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- Whether it has been sealed before
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we will take it from there.
Your questions about external mastic in Manuden
Is Manuden within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Stansted Mountfitchet station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
How long does external mastic take?
It depends on the size of the job, but most jobs take anything from a few hours to several days, depending on the building. We will tell you when we quote.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses, and we are fully insured.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best so the joint doesn’t draw the eye.
Can a movement joint be filled with mortar?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose, and the wall may crack nearby. We’ll reseal it with a flexible sealant.
Are you insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
How do I get a quote for external mastic in Manuden?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or email us and tell us what needs doing and where.
Can I do it myself?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Manuden buildings and the weather
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near Church of St Mary the Virgin, the joints between older walls, newer extensions and the roofline need a sealant that can move. Schools such as Manuden Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Manuden is about 4 miles north of Bishop's Stortford, in Hertfordshire. We carry out external mastic for homeowners, landlords and businesses in Manuden and nearby, as part of our work across Hertfordshire. We cover 381 towns and villages across Hertfordshire. Chelmsford is on our list too, around 19 miles away.
All of CM23 is within our area for external mastic. You’ll find streets such as The Street, Watts Yard and Mailers Lane. Other places close to Manuden include Mount Pleasant (1 mile west), Bentfield Green (1 mile south-east), Uppend (1 mile west), Farnham (2 miles south-west) and Stansted Mountfitchet (2 miles south-east). We also work in nearby towns such as Stevenage (15 miles west), Bishop's Stortford (4 miles south), Hoddesdon (14 miles south-west), Hertford (13 miles south-west), Ware (11 miles south-west) and Broxbourne (14 miles south-west).
Landmarks near Manuden
We work in homes and buildings around Yew Tree Inn, among other places. Manuden’s nearest station is Stansted Mountfitchet station, about 2 miles south-east of the centre. Well-known places in the area include Herts and Essex Hospital (3.8 miles south) and House On The Hill Toy Museum (1.9 miles south-east). Open spaces near Manuden include Portingbury Hills and Aubrey Buxton Nature Reserve.
Different surfaces, different methods
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant.
Also near Manuden
Also in Manuden
Why it’s worth doing now in Manuden
A failed movement joint lets water into the wall. Dealing with it early keeps the repair to the joint, rather than the wall around it. Older cottages and farmhouses around Manuden can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
What you get with us
- White, clear, grey or another colour, product permitting
- Domestic, commercial and hotel work
- We agree the colour with you first
- We never seal over old sealant
Take a look at how sealant jobs are priced or what customers say.
Common problems we fix in Manuden
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
The problems people normally mention when they call include:
- Failed seals between different materials
- Joints pointed up with cement by mistake
- Joints with sealant missing in places
- Leaking joints around cladding and façade panels
Rented homes near Stansted Mountfitchet station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Questions to ask before you book
- What insurance they hold
- When the joint can take water or movement
- Whether you can choose the colour
- What guarantee comes with the work