Hertfordshire · England
External & façade joints in Mount Pleasant, Hertfordshire
Sealing brickwork movement joints, render, cladding and façade joints in Mount Pleasant, with a one-year guarantee on every job. Call for a quick quote.
- Plants rooting in failed movement joints
- Panel joints letting water in
- Joints pointed up with cement by mistake
What sealant work can’t fix
Before you book, it’s worth knowing the limits:
- Subsidence or other structural problems
- Cutting new joints into brickwork, which is building work rather than sealant work
- Damp that is not coming from the joint
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
Surfaces we seal
- Joints between brick and frames
- Copings & trims
- Render & cladding joints
- Façade panels
- Concrete & block
- Brickwork movement joints
How we handle external mastic in Mount Pleasant
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what’s needed to reach them safely. We work on render & cladding joints, copings & trims and joints between brick and frames, and the jobs we see most are movement joints filled with mortar instead of sealant and damp patches traced to an open external joint.
External sealant needs dry, clean surfaces, so work around Mount Pleasant is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
You’re covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Location
- Mount Pleasant (CM23)
- Region
- Hertfordshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
When to call us in Mount Pleasant
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
These are the problems we’re asked about most:
- Hard, crazed mastic that has stopped moving
- Damp patches traced to an open external joint
- Sealant pulling away from one side of the joint
- Moss and dirt in joints with no sealant left
If you live in an older home near Church of St Mary the Virgin, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Before you book anyone
- What happens if the job turns out different
- What guarantee comes with the work
- Whether VAT is included
- When the joint can take water or movement
What external mastic looks like in Mount Pleasant
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.
For landlords with property near Stansted Mountfitchet station, outside joints that have cracked can let damp into a rental, so check them between lets. Schools such as Manuden Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Mount Pleasant is about 4 miles north of Bishop's Stortford, in Hertfordshire. If you need external mastic in Mount Pleasant, it’s easy to get a quote: please call 0345 464 0079 or email us. We’re based in Crawley and cover Hertfordshire, Mount Pleasant included. Across Hertfordshire, we cover 381 places, and Mount Pleasant is one of them. There’s also a page for Chelmsford, roughly 19 miles from Mount Pleasant.
Postcode districts we cover here for external mastic: CM23. Neighbouring places we cover for external mastic include Uppend (1 mile south-west), Manuden (1 mile east), Farnham (1 mile south), Berden (2 miles north) and Bentfield Green (2 miles south-east). We also work in nearby towns such as Stevenage (14 miles west), Bishop's Stortford (4 miles south), Hoddesdon (14 miles south-west), Hertford (13 miles south-west), Ware (11 miles south-west) and Baldock (15 miles west).
Near you in Mount Pleasant
Locally, jobs take us to homes and businesses close to Yew Tree Inn. The closest station to Mount Pleasant is Stansted Mountfitchet station, roughly 2.6 miles south-east of the centre. A little further out are House On The Hill Toy Museum (2.6 miles south-east) and Moated mound (2.8 miles south-west). Green spaces nearby include Aubrey Buxton Nature Reserve.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Different surfaces, different methods
Copings and trims
A failed coping joint lets water into the top of the wall. Sealing them early saves the wall below.
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.
Towns and villages near Mount Pleasant
More services for Mount Pleasant
The process
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to several days, depending on the building. In a small place like Mount Pleasant, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Clear items away from the joints we’re working on
- Tell us about access, such as stairs, a lift or high-level joints
- Try not to wet indoor joints just before the visit
Ask for a quote
Want a quote for external mastic? Please call 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and send you a clear quote before any work starts.
Advice
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Avoid pressure-washing directly into sealant joints
- Ask before painting over external sealant
- Deal with leaking gutters that soak the joints below
- Check external joints each spring
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
FAQs for Mount Pleasant
Do you cover Mount Pleasant for external mastic?
Yes, Mount Pleasant is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
Can you help a landlord with a rental near Stansted Mountfitchet station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
How long should I leave it?
It depends on the product and the conditions. Before we leave, we will tell you the cure time.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us.
Can you seal joints between two different materials?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides with primer where required.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Landlords, agents and businesses in Mount Pleasant
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.