Hampshire · England
The Frenches External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in The Frenches, with a 12-month guarantee on every job. Ask us for a quote.
- Joints where the bead has come unstuck
- Rain getting behind render or cladding at a joint
- Brick movement joints where the sealant has split
External mastic in The Frenches
On houses, flats and commercial buildings across The Frenches, we reseal joints in brickwork, render, cladding and façade panels. The preparation is the same whatever the wall: clean joint faces and the right depth. If you have joints where the bead has come unstuck and plants rooting in failed movement joints, we can put it right.
Outside joints can only be sealed when they’re dry, so work in The Frenches is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Location
- The Frenches (SO51)
- Wider area
- Hampshire
- Cover
- One year on every job
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
We won’t take on work that won’t last, so these are the limits:
- Cracked brickwork or render that needs a builder or plasterer
- Damp that is not coming from the joint
- Adding movement joints to masonry that has none
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Joints between brick and frames
- Façade panels
- Copings & trims
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
What affects the quote in The Frenches
Jobs vary more than people expect. What affects the quote:
- Any mould that needs treating
- How easy the joints are to reach
- The product the joint needs
- Whether old sealant or filler has to be cut out
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we will go through it with you.
Helping us quote
Photos by email are helpful but not essential. Please mention:
- Roughly how big the job is
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
- Where the property is
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job, and we will come back to you with a quote.
Nearby places to The Frenches
More services for The Frenches
Common questions in The Frenches
Is The Frenches within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is The Frenches in your area for external mastic?
Yes, The Frenches is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear price.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
How much does external mastic cost in The Frenches?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before we start.
Is there any odour?
There can be a smell while the sealant cures. Opening a window helps.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
How do you reach high-level joints?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher ones, send details and we’ll confirm the access.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
What external mastic looks like in The Frenches
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Mottisfont Abbey (about 3.1 miles north) are a reminder that the area around The Frenches 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.
Homes close to Church of All Saints include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. For landlords with property near Mottisfont & Dunbridge station, split movement joints are easy to miss on a rental until damp shows inside.
The Frenches is about 3 miles west of Romsey, in Hampshire. Our applicators cover external mastic for homes and businesses in The Frenches and the surrounding area, as part of our work across Hampshire. The Frenches is one of 683 places in Hampshire where we work. There’s also a page for Southampton, about 9 miles away.
Our applicators cover all of the SO51 postcode area for external mastic. Other places close to The Frenches include Shootash (1 mile east), Plaitford Green (2 miles west), West Wellow (2 miles south-west), East Wellow (2 miles south) and Blackhill (3 miles south). Larger places within reach include Winchester (11 miles east), Eastleigh (10 miles east), Andover (15 miles north), Totton (6 miles south-east), Chandler's Ford (8 miles east) and Hedge End (13 miles south-east).
Around The Frenches
The nearest railway station is Mottisfont & Dunbridge station, about 2.5 miles north. Other landmarks nearby include King Johns House (2.7 miles east) and Romsey Community Hospital (3.4 miles east). Green spaces nearby include Copythorne Common.
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Housing providers, facilities teams and property managers book us too in The Frenches and across Hampshire. Several sites can go on one quote, and we’re fully insured for the work.
What happens on the day
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like The Frenches, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- 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.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
- Plan for the work area to be out of bounds to pets and children
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you’re ready, phone 0345 464 0079 or drop us an email.
Related advice
Surface by surface
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind.
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joint sealant has to cope with frequent movement. We choose the product to suit.
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
How to look after the new joints
After the cure time, these simple habits help:
- Act on the first splits you see
- Deal with leaking gutters that soak the joints below
- Check the sealant is paintable before painting near it
- Tell anyone working on the walls about the movement joints
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Act while the splits are small. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.