Hampshire · England
Hatherden External Mastic
Our applicators work in Hatherden on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Movement joints filled with mortar instead of sealant
- Weathered mastic that no longer stretches
- Panel joints letting water in
External mastic for homes and businesses in Hatherden
A movement joint is a deliberate break that lets a wall expand and contract. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. If you have cracked joints where brick meets render or frames and panel joints letting water in, we can help, whatever the surface.
Around Hatherden, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
Every job comes with our one-year guarantee, wherever you are in Hampshire.
- Place
- Hatherden (SP11)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
Aftercare is simple:
- Wash walls gently around the sealant
- Keep water from gutters off the wall
- Never let anyone fill a movement joint with mortar
- Walk round the building once a year and look at the joints
Do not paint over the new sealant unless we have said the product is paintable. Many exterior sealants aren’t designed to be painted, and paint can crack as the joint moves.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
External mastic in Hatherden: local notes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Andover station? Then split movement joints are easy to miss on a rental until damp shows inside. In the older streets around Christchurch, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Hatherden is about 3 miles north of Andover, in Hampshire. Hatherden gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Hatherden is one of 683 places in Hampshire where we work. There’s also a page for Southampton, about 24 miles away.
Here we cover the SP11 postcode area for external mastic. That includes homes and businesses on Hatherden Lane, The Close and Hatchet Lane and the roads around them. We also cover Clanville (1 mile west), Foxcotte (2 miles south), Tangley (2 miles north-west), Penton Mewsey (2 miles south-west) and Charlton (2 miles south). Further out, we also cover Andover (3 miles south), Hyde (15 miles south-east), Tidworth (7 miles west), Weeke (15 miles south-east), Ludgershall (5 miles west) and Whitchurch (8 miles east).
Around Hatherden
In Hatherden, that means homes and buildings near The Hare & Hounds pub and Harrow Way Community School and the streets around them. The nearest railway station is Andover station, about 2.9 miles south of the centre. Nearby you’ll also find Andover War Memorial Hospital (2.6 miles south) and Andover Museum (3.2 miles south-east). Not far away are Mill Lake and Anton Lakes.
Surface by surface
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best.
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. We prime where the sealant needs it before sealing.
Common problems we fix in Hatherden
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
Common reasons people contact us are:
- Brick movement joints where the sealant has split
- Leaking joints around cladding and façade panels
- Old sealant gone brittle and cracked
- Joints where the bead has come unstuck
For site and facilities teams at buildings such as Hatherden Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing.
What your quote should include
- Is VAT in the price?
- How the joint is cleaned and prepared
- How long to leave it before use
- What guarantee comes with the work
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
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.
Your questions about external mastic in Hatherden
Do you cover smaller places like Hatherden?
Yes. Hatherden is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
I let a flat near Andover station. Can you help?
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.
Do the sealants smell?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
When will the joints need doing again?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Our work comes with a 12-month guarantee.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
What do you need from me for a quote?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or drop us an email.
Can you do several jobs on one visit?
Yes. Several rooms, windows or areas can go on one quote.
Is the work guaranteed?
Yes. All our work carries a 12-month guarantee.
Landlords, agents and businesses in Hatherden
Letting agents and landlords in Hatherden can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
For anyone letting property in or around Hatherden, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
When something else is needed
In fairness, some problems need a different trade:
- Subsidence or other structural problems
- Damp that is not coming from the joint
- Loose or hollow render, which needs re-rendering
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think before booking.
Joints and surfaces we work on
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Concrete & block
How the visit works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours to a few days, depending on the length of joint and the access, and the area is left clean. Somewhere like Hatherden needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any leaks or damp you’ve noticed
Getting a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. Whenever you are ready, phone 0345 464 0079 or drop us an email.