Hampshire · England
External Mastic in Highbridge
Movement joints in Highbridge need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Water getting into walls through failed joints
- Movement joints filled with mortar instead of sealant
- Leaking joints around cladding and façade panels
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
External mastic in Highbridge
Low-level joints can normally be done from the ground. For joints higher up, give us some details of the building and we’ll confirm what’s needed to reach them safely. Common call-outs are for weeds or debris growing in open joints and joints where the bead has come unstuck, across brickwork movement joints, concrete & block and façade panels.
Around Highbridge, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Your job is guaranteed for a year, as with all our work.
- Place
- Highbridge (SO50)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Common questions in Highbridge
Is Highbridge in your area for external mastic?
Yes. We work across London and the South East, and Highbridge is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear quote.
I let a flat near Eastleigh station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Do you work at height?
It depends on the height and the site. Ground-floor joints are simple; for higher ones, send details and we will confirm the access.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
How much does external mastic cost in Highbridge?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
Do I have to be there?
If the work is inside, we need someone to let us in. Once we have agreed the job, you don’t need to watch us work.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
How we quote for external mastic
Every job gets its own quote. These are the things that affect it:
- How much there is to do
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
- Whether the work is at height
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
What to tell us for a quote
To make quoting easier, please include:
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
- Where the property is
- The problem you’ve noticed
Want a quote for external mastic? Please ring 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
How the job changes by surface
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it. Send us any details you have about the façade.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that’s happened, we rake it out and reseal it properly.
Nearby places to Highbridge
Other services in Highbridge
Do you need external mastic in Highbridge?
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
The most common problems we see are:
- Cracked joints where brick meets render or frames
- Weathered mastic that no longer stretches
- Plants rooting in failed movement joints
- Water getting into walls through failed joints
Letting a property close to Eastleigh station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What to look for in a quote
- How the joint is cleaned and prepared
- Whether VAT is included
- How hidden problems are handled
- What insurance they hold
Walls and rooflines in Highbridge
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like South Stoneham House (about 4.2 miles south-west) are a reminder that the area around Highbridge has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Homes close to St Mary's Church include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain. Schools such as Colden Common Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Highbridge is about 2 miles north of Eastleigh, in Hampshire. Whether you’re in the middle of Highbridge or further out, we cover external mastic for every kind of property. Across Hampshire, we cover 683 places, Highbridge among them. Southampton is on our list too, about 6 miles from Highbridge.
Postcode districts we cover here for external mastic: SO50. External mastic is available to properties on Wardle Road and Highbridge Road and the roads around them. We also cover the places around Highbridge: Lord's Wood (1 mile south-east), Brambridge (1 mile north-east), Colden Common (1 mile north-east), Nob's Crook (1 mile east) and Allbrook (1 mile west). Within a short drive, we also cover Winchester (5 miles north), Gosport (15 miles south-east), Fareham (11 miles south-east), Horndean (15 miles east), Totton (9 miles south-west) and Hedge End (5 miles south).
Landmarks near Highbridge
Around Highbridge, our work takes us to homes and buildings near Thornden School and Thornden School. For rail, the closest station is Eastleigh station, roughly 1.7 miles south-west of the centre. A little further out are Eastleigh Museum (1.8 miles south-west) and Moorgreen Hospital (4.3 miles south). Green spaces nearby include Shawford Down and Twyford Down.
Landlord and commercial work in Highbridge
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
For anyone letting property in or around Highbridge, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
How the visit works
Most of a good job is in the preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. Somewhere like Highbridge needs a little journey planning: 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.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Let us know about stairs, lifts or work at height
- Tell us if parking is tricky
- Mention any leaks or damp you’ve noticed
Getting a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Read more
Honest limits
Sealant is not the answer to every problem, and we’ll tell you before any work starts. Sealant won’t put right:
- Render that’s blown, hollow or coming away
- Walls that need new movement joints cut into them
- Cracks in the bricks or render themselves, away from the joints
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
What we seal
- Copings & trims
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Concrete & block