Hampshire · England
External & façade joints in Overton, Hampshire
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Overton and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Damp patches traced to an open external joint
- Joints pointed up with cement by mistake
- Failed seals between different materials
How we handle external mastic in Overton
For buildings in Overton, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean joint faces and the right depth. We work on joints between brick and frames, concrete & block and render & cladding joints, and the jobs we see most are rigid filler in a joint that should flex and water getting into walls through failed joints.
Homes around Overton range from older cottages to newer houses, with walls and rooflines of every type. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
We stand behind the work with a one-year guarantee.
- Location
- Overton (RG25)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- Render that is blown, hollow or coming away
- Movement that’s more than a sealant joint can take
- Walls that need new movement joints cut into them
If in doubt, ring 0345 464 0079 or email us and we will say what we think before booking.
What we seal
- Concrete & block
- Copings & trims
- Joints between brick and frames
- Façade panels
- Render & cladding joints
- Brickwork movement joints
Overton: your questions answered
I let a flat near Overton station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Is Overton within the area you cover?
Yes, Overton is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you take out the old sealant first?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint before we leave.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
Where do you work from?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first.
Overton buildings and the weather
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Overton Church of England 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 Mary, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Overton is about 7 miles west of Basingstoke, in Hampshire. We carry out external mastic for homeowners, landlords and businesses in Overton and nearby, as part of our work across Hampshire. Our area takes in 683 places across Hampshire, large and small. For nearby work, see our Reading page (19 miles or so).
All of RG25 is covered for external mastic. Local streets include High Street, Station Road and London Road. We also cover the places around Overton: Southington (1 mile west), Quidhampton (1 mile north), Laverstoke (2 miles south-west), Freefolk (2 miles west) and Deane (2 miles east). Further out, we also cover Basingstoke (7 miles east), Winchester (13 miles south), Andover (10 miles west), Alton (14 miles south-east), Tadley (9 miles north-east) and Hook (14 miles east).
Local landmarks in Overton
Locally, jobs take us to homes and businesses close to The Greyhound pub, among other places. For rail, the closest station is Overton station, roughly 0.8 miles north.
Landlords, agents and businesses in Overton
We work for landlords and letting agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
The process
Before we leave, we go over the finished joints with you. The visit itself generally takes anything from a few hours to several days, depending on the building, depending on how much there is to do. A visit to Overton 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 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.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Move anything stored near the joints
- Let us know about parking restrictions
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Read more
Signs you need external mastic in Overton
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
The most common problems we see are:
- Old sealant gone brittle and cracked
- Gaps where render, brick and frames meet
- Sealant that has lost its bond to the brick or render
- Panel joints letting water in
Rented homes near Overton station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Comparing quotes
- How the joint is cleaned and prepared
- How much experience the applicator has
- Whether you can choose the colour
- What product goes in the joint
What happens if it’s left?
Running new sealant over the old bead rarely lasts. New sealant does not bond well to old, weathered sealant, so the old joint is cut out fully first. Around Overton, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in Overton
- Any old sealant cut out fully, not covered over
- Neat joints and a tidy finish
- A choice of colours where the product allows
- You choose the colour before work begins
Aftercare tips
Good habits help new joints last longer. A few tips:
- Ask before painting over external sealant
- Keep water from gutters off the wall
- Get split or bare joints resealed while the damage is small
- Never let anyone fill a movement joint with mortar
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
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.