Hampshire · England
External Mastic in Monxton
External mastic for Monxton, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Leaking joints around cladding and façade panels
- Movement joints filled with mortar instead of sealant
- Damp patches traced to an open external joint
How we handle external mastic in Monxton
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. We work on façade panels, render & cladding joints and joints between brick and frames, and the jobs we see most are movement joints with cracked, split or missing sealant and plants rooting in failed movement joints.
In a village or hamlet like Monxton, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
A 12-month guarantee comes as standard, so you’re covered after we have gone.
- Location
- Monxton (SP11)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Why deal with it now?
Resealing a run of joints in one go is usually better than patching one at a time. They’ve weathered the same way, and access only has to be arranged once. Where a wall is exposed, as many are in small places like Monxton, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Doing several joints on one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Why us?
- Full insurance on every job
- White, clear, grey or coloured to suit, where the product allows
- A 12-month guarantee on all work
- A sealant colour to suit the surroundings
See our cost guide and our reviews.
Towns and villages near Monxton
What else we do in Monxton
Monxton questions
Is Monxton in your area for external mastic?
Yes, Monxton is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Do you cover smaller places like Monxton?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
How long does external mastic take?
Typically it takes a few hours to a few days, depending on the length of joint and the access. Larger jobs naturally take longer.
What information do you need?
A short description and the location. We will ask anything else we need to know.
When will the joints need doing again?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Every job carries our 12-month guarantee.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. We will talk through colour options before any work starts.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
Landlord and commercial work in Monxton
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We also work for property managers and facilities teams. Several sites can be quoted together.
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Point out the joints to other trades
- Clear growth from the base of walls and joints
- Look over the joints every year, ideally after winter
- Wash walls gently around the sealant
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
How the visit works
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. Somewhere like Monxton needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Plan for the work area to be out of bounds to pets and children
- Mention any sign-in or site rules at work premises
Get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.
Advice
Outside joints around Monxton
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.
For an older house near a landmark such as Church of St Mary, the joints between older walls, newer extensions and the roofline need a sealant that can move. For landlords with property near Andover station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Monxton is about 3 miles west of Andover, in Hampshire. From the centre of Monxton to the outskirts, external mastic is available for homes and businesses alike. Our area takes in 683 places across Hampshire, from the larger towns to small villages. Our Southampton page covers work nearby, about 21 miles away.
Here we cover the SP11 postcode area for external mastic. Whether your property is on High Street, Green Lane and Abbotts Ann Road or a nearby road, our applicators can take on the job. Other places close to Monxton include Amport (1 mile west), Abbotts Ann (1 mile south-east), Fox (1 mile south-west), Little Ann (2 miles south-east) and Anna Valley (2 miles east). Larger places within reach include Winchester (14 miles south-east), Andover (3 miles east), Romsey (14 miles south), Hyde (14 miles south-east), Tidworth (6 miles north-west) and Weeke (13 miles south-east).
Near you in Monxton
We work in homes and buildings around The Black Swan Public House and John Hanson Community School and the streets around them. Monxton’s nearest station is Andover station, about 2.8 miles east. Other landmarks nearby include Andover Museum (3.4 miles east) and Andover War Memorial Hospital (2.8 miles north-east). The countryside around Monxton includes Anton Lakes and Mill Lake.
What affects the cost of external mastic
The price is agreed before any work begins. It takes into account:
- When we can work, for business premises
- Access and height
- The product the joint needs
- Mould in or behind the old joints
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- How we’d reach the joints
- The address or postcode of the job
- The rough size of the job
- If it’s domestic, commercial or a hotel
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
Signs you need external mastic in Monxton
Sometimes a movement joint was filled with mortar or a rigid filler. The joint cannot move, so the wall cracks somewhere else instead.
People normally contact us after spotting something like this:
- Hard, crazed mastic that has stopped moving
- Movement joints with cracked, split or missing sealant
- Cracked joints where brick meets render or frames
- Moss and dirt in joints with no sealant left
Schools such as Amport Church of England Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Questions to ask before booking
- How the joint is cleaned and prepared
- What the quote includes, VAT included or not
- What the cure time is
- Whether all the old sealant comes out first
Different surfaces, different methods
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.
Cladding and façade panels
Cladding and façade panels are normally separated by sealed joints. We reseal them with a sealant suited to the panel material.