Hampshire · England
External & façade joints in New Milton, Hampshire
Professional external mastic in and around New Milton, with every bit of old sealant taken out first.
- Sealant pulling away from one side of the joint
- Movement joints filled with mortar instead of sealant
- Weeds or debris growing in open joints
What affects the cost of external mastic
For a quick quote, just ask. What matters most is:
- Any mould that needs treating
- The number of rooms or windows
- The number and length of the joints
- How much old sealant there is and how hard it is to remove
Doing several joints on one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Helping us quote
Before you ask for a quote, have a think about:
- Whether it has been sealed before
- How we’d reach the joints
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
We quote each job on its own, so start by telling us what you need. Just phone 0345 464 0079 or send us an email with the details and send pictures if you have them.
External mastic for homes and businesses in New Milton
On houses, flats and commercial buildings across New Milton, 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 are dealing with movement joints filled with mortar instead of sealant and failed sealant between panels on a façade, we can help, whatever the surface.
In and around New Milton, older properties sit alongside newer ones, each with its own outside joints. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
Every job comes with our 12-month guarantee, wherever you are in Hampshire.
- Where
- New Milton (BH25)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Fix overflowing gutters above sealed joints
- Get split or bare joints resealed while the damage is small
- Ask before painting over external sealant
- Check external joints each spring
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Small splits are the time to act. At that stage it’s a simple cut out and reseal.
Signs you need external mastic in New Milton
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it cannot stretch and rips as the joint opens.
Signs it’s time to call us include:
- Rain getting behind render or cladding at a joint
- Rigid filler in a joint that should flex
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
In the older streets around Parish Church of St Magdalene, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Comparing quotes
- Whether all the old sealant comes out first
- How long the guarantee is
- When the joint can take water or movement
- Are they insured?
New Milton questions
Is external mastic in a coastal place like New Milton any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Can you help a landlord with a rental near New Milton station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Why do you put foam in the joint first?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. Then the sealant bonds to two faces and can move.
Is the work guaranteed?
Yes. Each job is guaranteed for twelve months, large or small.
Is it OK to fill a movement joint with cement?
No, not where the gap is a movement joint. Pointing it stops it working, and the wall may crack nearby. A flexible sealant is the right fill.
How long will you be here?
It depends on the size of the job, but as a guide it takes a few hours to a few days, depending on the length of joint and the access. We will tell you when we quote.
How it works
The work is kept neat and contained to the area we are working on. The job generally takes a few hours to a few days, depending on the length of joint and the access, and we explain the cure time before we leave. A visit to New Milton is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Keep children and pets away from the work area
- Mention any parking rules near the property
- Let us know about earlier repairs to the joints
Get a quote
To get a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. We will give you a clear price before any work starts.
Advice
Also near New Milton
Other services in New Milton
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
For landlords and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
For anyone letting property in or around New Milton, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
External mastic in New Milton: local notes
New Milton is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Historic houses like Highcliffe Castle (about 2.7 miles south-west) are a reminder that the area around New Milton has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Managing a site like The Arnewood School? Then its movement joints, gutters and trims need looking after like any other building’s. If you let a flat or house near New Milton station, split movement joints are easy to miss on a rental until damp shows inside.
New Milton is in Hampshire. Every kind of property in New Milton is covered for external mastic. Every job comes with our 12-month guarantee. New Milton is one of 683 places in Hampshire where we work for external mastic. For nearby work, see our Southampton page, about 16 miles away.
All of BH25 is within our area for external mastic, from the main roads to the quietest streets. Whether your property is on Station Road, Worthy Road and Whitefield Road or a nearby road, our applicators can take on the job. Main roads around New Milton include the A337 and B3055. We also cover the places around New Milton: Ashley (1 mile north-east), Barton on Sea (1 mile south), Bashley (1 mile north), Ossemsley (2 miles north) and Hordle (2 miles east). Within a short drive, we also cover Totton (13 miles north-east), Lymington (5 miles east), Hythe (13 miles north-east), Ringwood (8 miles north-west), Dibden Purlieu (13 miles north-east) and Marchwood (13 miles north-east).
Around New Milton
In New Milton, that means homes and buildings near The George Centre pub and New Milton Junior School and the streets around them. There’s a railway station in New Milton itself: New Milton station. A little further out are Highcliffe Castle (2.7 miles south-west) and Sammy Miller Motorcycle Museum (1 mile north-west). Open spaces near New Milton include Milford on Sea LNR.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracking across the wall rather than at a joint
- Failed render or damaged cladding panels
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before booking.
What we seal
- Façade panels
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Joints between brick and frames