Hampshire · England
External Mastic in Over Wallop
We cover Over Wallop for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Weeds or debris growing in open joints
- Rigid filler in a joint that should flex
- Old sealant gone brittle and cracked
About our external mastic in Over Wallop
For buildings in Over Wallop, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you are dealing with weathered mastic that no longer stretches and joints pointed up with cement by mistake, we can put it right, whatever the surface.
Outside joints can only be sealed when they’re dry, so work in Over Wallop is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Place
- Over Wallop (SO20)
- Region
- Hampshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
We work for landlords and letting agents as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
For anyone letting property in or around Over Wallop, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
How we quote for external mastic
You’ll get a clear quote before work begins. It takes into account:
- Access and height
- The number of rooms or windows
- Whether there’s mould to deal with
- Which sealant suits the joint
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
What to tell us for a quote
When you contact us, these details help:
- Access, such as stairs, a lift or height
- The rough size of the job
- Pictures of the joints, sent by email
- The address or postcode of the job
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
When to call us in Over Wallop
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and tears as soon as the joint widens.
It’s worth asking for a quote if you see:
- Leaking joints around cladding and façade panels
- Movement joints with cracked, split or missing sealant
- Cracked joints where brick meets render or frames
- Weeds or debris growing in open joints
Rented homes near Grateley station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- Who turns up on the day
- What insurance they hold
- Whether all the old sealant comes out first
- Whether you can choose the colour
Different surfaces, different methods
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. We prime where the sealant needs it before sealing.
Outside joints around Over Wallop
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like Wallop Primary School? Then its movement joints, gutters and trims need looking after like any other building’s. For an older house near a landmark such as Church of St Peter, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Over Wallop is about 7 miles south-west of Andover, in Hampshire. Over Wallop gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. We cover 683 towns and villages across Hampshire, from the larger towns to small villages. Our Southampton page covers work nearby, about 18 miles away.
Our applicators cover all of the SO20 postcode area for external mastic and the streets around it. If you need external mastic at a property on Station Road, King Lane and King Lane Cottages or anywhere close by, our applicators can take on the job. We also cover the places around Over Wallop: Middle Wallop (1 mile south-east), Kentsboro (2 miles north-east), Nether Wallop (2 miles south-east), Fox (3 miles north) and Amport (4 miles north). Within a short drive, we also cover Winchester (13 miles south-east), Andover (7 miles north-east), Chandler's Ford (14 miles south-east), Romsey (12 miles south-east), Hyde (13 miles south-east) and Tidworth (7 miles north-west).
Around Over Wallop
Typical jobs here are in homes near The White Hart Inn and the streets around them. The closest station to Over Wallop is Grateley station, roughly 2 miles north-west of the centre. Not far away are Winterbourne Downs RSPB reserve and Quarley Hill.
The process
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take a few hours for a handful of joints, longer for a whole elevation. In a small place like Over Wallop, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any water getting in
- For business premises, tell us about site rules or sign-in
How to get a quote
For a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before any work starts.
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Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Never let anyone fill a movement joint with mortar
- Avoid pressure-washing directly into sealant joints
- Keep water from gutters off the wall
- Show decorators and builders where the movement joints are
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
Questions from Over Wallop
I let a flat near Grateley station. Can you help?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Is Over Wallop within the area you cover?
Yes, Over Wallop is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
How long does external mastic take?
Typically it takes anything from a few hours to several days, depending on the building. Bigger jobs take longer.
Do you have insurance?
Yes. We are fully insured, and we can confirm the details when we quote.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
How do I get a quote for external mastic in Over Wallop?
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.
What happens if it’s left?
A failed movement joint lets water into the wall and can run behind render or cladding. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. In a small place like Over Wallop, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why Over Wallop clients choose us
- Approved under the ARBOMaster scheme
- 12-month guarantee on every job
- Experience in homes, commercial sites and hotels
- Quality sealants from Arbo and Everbuild
See our cost guide or customer reviews.