Buckinghamshire · England
External & façade joints in Mop End, Buckinghamshire
We cover Mop End for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Plants rooting in failed movement joints
- Old sealant gone brittle and cracked
- Joints with sealant missing in places
About our external mastic in Mop End
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the line blends in. If you have sealant pulling away from one side of the joint and joints pointed up with cement by mistake, we can help, on render & cladding joints, façade panels and brickwork movement joints alike.
Outside joints can only be sealed when they’re dry, so work in Mop End is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Location
- Mop End (HP7)
- Region
- Buckinghamshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take a few hours for a handful of joints, longer for a whole elevation. In a small place like Mop End, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Keep pets and children clear of the area while we work
- Let us know about parking restrictions
Getting a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or drop us an email.
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Quotes for external mastic in Mop End
There’s no set price list, because jobs vary so much. The quote depends on:
- Access and height
- Which sealant suits the joint
- Whether there’s mould to deal with
- The number of rooms or windows
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Asking for a quote
What to tell us when you ask for a quote:
- A few photos by email, if you can
- Whether it has been sealed before
- The address or postcode of the job
- Any access issues, like height or stairs
For external mastic in Mop End, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before we start.
Can I do it myself?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
What sealant work can’t fix
In fairness, some problems need a different trade:
- Rising or penetrating damp from elsewhere in the wall
- Subsidence or other structural problems
- Loose or hollow render, which needs re-rendering
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Copings & trims
- Concrete & block
- Joints between brick and frames
Your questions about external mastic in Mop End
Can you help a landlord with a rental near Amersham station?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Will you come out to Mop End?
Yes, Mop End is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
How do I get a quote for external mastic in Mop End?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we will tell you what we’re using.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint.
Can you reach joints on upper floors?
It depends on the height and the site. Low-level joints are straightforward; for higher work, tell us about the building and we will confirm what’s needed.
Do you work for hotels and businesses?
Yes, regularly. We can plan bigger jobs in stages.
Surface by surface
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so the movement is taken up.
Places near Mop End
Also in Mop End
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Avoid pressure-washing directly into sealant joints
- Check external joints each spring
- Show decorators and builders where the movement joints are
- Keep movement joints as flexible joints, not mortar
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
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.
Outside joints around Mop End
Historic houses like Hughenden Manor (about 4.1 miles west) are a reminder that the area around Mop End 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. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Curzon Church of England Combined School, larger buildings have long runs of movement joint that eventually need resealing. Letting a property close to Amersham station? Then outside joints that have cracked can let damp into a rental, so check them between lets. If you live in an older home near Church of the Holy Trinity, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Mop End is about 3 miles west of Amersham, in Buckinghamshire. We provide external mastic to householders, landlords and businesses in Mop End and nearby, as part of our work across Buckinghamshire. Our Buckinghamshire coverage runs to 263 places, Mop End among them. For nearby work, see our Reading page (20 miles or so).
Postcode districts we cover here for external mastic: HP7. Nearby, we also carry out external mastic in Penn Street (1 mile south), Beamond End (1 mile west), Woodrow (1 mile south-east), Holmer Green (1 mile west) and Winchmore Hill (1 mile south-east). Within a short drive, we also cover Aylesbury (12 miles north-west), High Wycombe (4 miles south-west), Chesham (4 miles north-east), Marlow (8 miles south-west), Amersham (3 miles east) and Beaconsfield (4 miles south).
What’s near Mop End
Locally, jobs take us to homes and businesses close to The Squirrel pub and Holmer Green Senior School, among other places. The closest station to Mop End is Amersham station, about 2.6 miles east. A little further out are Great Missenden (2.3 miles north-west) and Amersham Fair Organ Museum (3.1 miles east). Green spaces nearby include Gomm's Wood.
Landlord and commercial work in Mop End
We work for landlords and agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
For anyone letting property in or around Mop End, several properties can go on one quote. Send us the addresses and the work at each.