Hampshire · England
External Mastic in North Stoneham
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in North Stoneham and across Hampshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Weathered mastic that no longer stretches
- Sealant pulling away from one side of the joint
- Plants rooting in failed movement joints
When to call us in North Stoneham
A lot of failed joints come down to preparation: 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.
It’s worth asking for a quote if you see:
- Plants rooting in failed movement joints
- Weathered mastic that no longer stretches
- Brick movement joints where the sealant has split
- Joints pointed up with cement by mistake
If you let a flat or house near Southampton Airport Parkway station, split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- How long the guarantee is
- Whether the sealant suits the joint
- Whether they seal over old material or remove it
- What insurance they hold
External mastic in North Stoneham, done properly
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. The colour is chosen to suit the brick or render. We are often asked to deal with leaking joints around cladding and façade panels and damp patches traced to an open external joint, on render & cladding joints, concrete & block and brickwork movement joints.
External sealant needs dry, clean surfaces, so work around North Stoneham is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Each job carries a 12-month guarantee, large or small.
- Place
- North Stoneham (SO50)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
Good habits help new joints last longer. A few tips:
- Look over the joints every year, ideally after winter
- Tell anyone working on the walls about the movement joints
- Wash walls gently around the sealant
- Get split or bare joints resealed while the damage is small
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
A joint that has stopped moving pushes the movement elsewhere, usually as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
North Stoneham questions
Is North Stoneham in your area for external mastic?
Yes. Our work covers London and the South East, and North Stoneham is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Do you work for landlords with property near Southampton Airport Parkway station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Do you take out the old sealant first?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
How often do external joints need resealing?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly.
How do you reach high-level joints?
It depends on the building. We work on joints that can be reached safely. Tell us about the building and we will confirm what access is needed.
How long before the joint can be used?
Cure times vary by product and the temperature. Before we leave, we will tell you the cure time.
How long does external mastic take?
That depends on the amount of work, but most jobs take a few hours to a few days, depending on the length of joint and the access. We’ll tell you when we quote.
Is it messy?
We keep the work tidy. We protect what’s around the joints, and we clear up when we are done.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams. We can quote a run of properties together.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We cut it out and start again.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Nearby places to North Stoneham
What else we do in North Stoneham
Leave it or put it right?
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. Around North Stoneham, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first.
Why book with us
- Anti-fungal silicone where joints get wet
- White, clear, grey or coloured to suit, where the product allows
- You choose the colour before work begins
- An ARBOMaster approved applicator
Take a look at what affects the cost and customer reviews.
Outside joints around North Stoneham
With historic houses such as South Stoneham House (about 1.3 miles south) nearby, there’s older building stock in the area around North Stoneham as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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 St. Nicolas' Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For site and facilities teams at buildings such as Nightingale Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
North Stoneham is about 2 miles south-west of Eastleigh, in Hampshire. Homes, rented property, offices and hotels in North Stoneham can book us for external mastic. The work is guaranteed for a year. North Stoneham is one of 683 towns and villages in Hampshire where we work for external mastic.
Jobs for external mastic in SO50 works the same way as everywhere else we cover. If you need external mastic at a property on Turnor Way and Stoneham Lane or anywhere close by, we can help. Nearby, we also carry out external mastic in Swaythling (1 mile south), Bassett Green (1 mile south), Mansbridge (1 mile south-east), Eastleigh (2 miles north-east) and Boyatt Wood (2 miles north-east). Further out, we also cover Winchester (8 miles north), Gosport (14 miles south-east), Fareham (11 miles south-east), Totton (6 miles south-west), Hedge End (4 miles south-east) and Romsey (5 miles north-west).
Near you in North Stoneham
Locally, jobs take us to homes and businesses close to Saint George Catholic Voluntary Aided College Southampton, Saint George Catholic Voluntary Aided College Southampton and The Fleming Arms Public House, among other places. North Stoneham’s nearest station is Southampton Airport Parkway station, about 0.8 miles south-east. Other landmarks nearby include Princess Anne Hospital (2.7 miles south-west) and Eastleigh Museum (1.5 miles north-east). Green spaces nearby include Flexford Nature Reserve.
What affects the cost of external mastic
For a quick quote, just ask. The main things that affect it are:
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
- Mould in or behind the old joints
- The type of sealant required
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Any access issues, like height or stairs
- The type of property
- Roughly how big the job is
- What’s wrong with the joints now
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work.
How the visit works
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a handful of joints, longer for a whole elevation. Somewhere like North Stoneham needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Preparing for the visit
- Tell us if parking is tricky
- Clear items away from the joints we’re working on
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.