Hampshire · England
External & façade joints in Balmerlawn, Hampshire
We cover Balmerlawn for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Sealant that has lost its bond to the brick or render
- Failed seals between different materials
- Failed sealant between panels on a façade
How we handle external mastic in Balmerlawn
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall so the joint doesn’t stand out. We work on brickwork movement joints, joints between brick and frames and façade panels, and people most often call us about rigid filler in a joint that should flex and cracked joints where brick meets render or frames.
Older homes in small places like Balmerlawn may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
All our work is covered by a 12-month guarantee, wherever you are in Hampshire.
- Location
- Balmerlawn (SO42)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the cost of external mastic
You will get a clear quote before we start. It’s based on:
- How much old sealant there is and how hard it is to remove
- The number and length of the joints
- The type of sealant required
- Access and height
What you pay reflects the work, not guesswork. That is why we ask about the job first.
What we need to know
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The rough size of the job
- The type of property
- The address or postcode of the job
- Any access issues, like height or stairs
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we will come back to you with a quote.
What external mastic looks like in Balmerlawn
With historic houses such as Beaulieu Palace House (about 4.9 miles east) nearby, there’s older building stock in the area around Balmerlawn as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Church of St Nicholas, the joints between older walls, newer extensions and the roofline need a sealant that can move. If you look after a building such as Brockenhurst Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Balmerlawn is about 5 miles north of Lymington, in Hampshire. Every kind of property in Balmerlawn can book us for external mastic. Every job comes with our 12-month guarantee. Our Hampshire coverage runs to 683 places, Balmerlawn among them. Our Southampton page covers work nearby, about 10 miles away.
Here we cover the SO42 postcode area for external mastic. Close by, we work in Brockenhurst (1 mile south-west), Setley (1 mile south), South Weirs (2 miles south-west), Lyndhurst (3 miles north) and Emery Down (3 miles north). Further out, we also cover Eastleigh (14 miles north-east), Totton (7 miles north), Chandler's Ford (13 miles north-east), Hedge End (13 miles north-east), Lymington (5 miles south) and Romsey (12 miles north).
Local landmarks in Balmerlawn
Locally, jobs take us to homes and businesses close to Rose And Crown Hotel, among other places. The nearest railway station is Brockenhurst station, about 0.9 miles south-west of the centre. A little further out are Lymington New Forest Hospital (4 miles south).
For landlords and businesses
Landlords and letting agents in Balmerlawn can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
If you manage several properties in or around Balmerlawn, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Common problems we fix in Balmerlawn
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
Most people get in touch after spotting one of these:
- Failed seals between different materials
- Rigid filler in a joint that should flex
- Weeds or debris growing in open joints
- Panel joints letting water in
If you let a flat or house near Brockenhurst station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Comparing quotes
- Is the old sealant removed completely?
- How the joint is cleaned and prepared
- How long to leave it before use
- Whether you can choose the colour
Common questions in Balmerlawn
Can you do external mastic in Balmerlawn?
Yes, Balmerlawn 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, and we will give you a clear quote.
I let a flat near Brockenhurst station. Can you help?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can be quoted together. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
What does external mastic cost?
We do not 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. We agree the price before any work begins.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Is there a guarantee?
Yes. There’s a 12-month guarantee on every job, wherever you are.
Can new sealant go over the old?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Are you an approved applicator?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
What do you need from me for a quote?
A short description and the location, plus photos if you have them. If we need more, we will ask.
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Tell anyone working on the walls about the movement joints
- Walk round the building once a year and look at the joints
- Wash walls gently around the sealant
- Keep soil, plants and ivy away from the joints
Only paint over the joint if we have confirmed the sealant can take paint. Many exterior sealants are not designed to be painted and spoil the finish.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way. In a small place like Balmerlawn, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Why book with us
- 180+ five-star Google reviews
- Anti-fungal silicone where joints get wet
- Domestic, commercial and hotel work
- White, clear, grey or another colour, product permitting
How it works
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take anything from a few hours to several days, depending on the building. Somewhere like Balmerlawn 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 look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Mention any tricky access
- Keep children and pets away from the work area
- For business premises, tell us about site rules or sign-in
How to get a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
Advice
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.