Hampshire · England
External & façade joints in Blendworth, Hampshire
External mastic across Blendworth and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Sealant that has lost its bond to the brick or render
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
When to call us in Blendworth
Poor preparation causes many early failures: 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.
People normally contact us when they notice something like this:
- Failed sealant between panels on a façade
- Weathered mastic that no longer stretches
- Movement joints with cracked, split or missing sealant
- Moss and dirt in joints with no sealant left
Rented homes near Rowlands Castle 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
- How long to leave it before use
- Are they insured?
- How hidden problems are handled
External mastic for homes and businesses in Blendworth
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render. We are often asked to deal with joints where the bead has come unstuck and failed sealant between panels on a façade, on copings & trims, brickwork movement joints and joints between brick and frames.
Somewhere as small as Blendworth, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
Your job is guaranteed for a year, as with all our work.
- Location
- Blendworth (PO8)
- Region
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Can I do it myself?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Different surfaces, different methods
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible year round.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so its sealant has to stay flexible.
Blendworth buildings and the weather
Historic houses like Uppark (about 4.8 miles north-east) are a reminder that the area around Blendworth has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Horndean Church of England Junior School, 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 the Holy Trinity, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Blendworth is about 1 mile north-east of Horndean, in Hampshire. For external mastic in and around Blendworth, please ring 0345 464 0079 or send us an email for a quick quote. We cover Hampshire from our Crawley base, Blendworth included. We cover 683 towns and villages across Hampshire, large and small. For nearby work, see our Portsmouth page.
Every address in PO8 is within our area for external mastic, from the main roads to the quietest streets. Other places close to Blendworth include Chalton (2 miles north-east), Forestside (3 miles east), West Marden (4 miles east), Buriton (4 miles north) and Weston (5 miles north). We also work in nearby towns such as Gosport (11 miles south-west), Havant (4 miles south), Fareham (10 miles south-west), Hedge End (14 miles west), Waterlooville (3 miles south-west) and Petersfield (6 miles north).
Landmarks near Blendworth
Locally, jobs take us to homes and businesses close to Horndean Technology College and The Ship & Bell pub. Blendworth’s nearest station is Rowlands Castle station, roughly 2.1 miles south-east. A little further out are Havant War Memorial Hospital (4.3 miles south) and Clanfield Earthwork (2.1 miles north). The countryside around Blendworth includes Windmill Hill.
Also near Blendworth
Other services in Blendworth
Common questions in Blendworth
Will you come out to Blendworth?
Yes, Blendworth is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Rowlands Castle station?
Yes. We work for landlords and letting agents as well as homeowners. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
Is it messy?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Do you seal joints where cladding meets other 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.
Can you reach joints on upper floors?
It depends on the building. Tell us the height, the number of joints and what’s below them and we’ll confirm how they can be reached safely.
How long does external mastic last?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away, and reseal at that point.
Do you guarantee your work?
Yes. There’s a 12-month guarantee on every job, wherever you are.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What happens on the day
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to several days, depending on the building. Somewhere like Blendworth 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.
- 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.
How to prepare
- Clear the area around the work
- For business premises, tell us about site rules or sign-in
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Getting a quote is simple: tell us what needs doing and where. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Advice
Landlord and commercial work in Blendworth
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.
Landlords and letting agents in Blendworth can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Keep high-pressure jets off the joints
- Do not let climbing plants root in the sealant
- Walk round the building once a year and look at the joints
- Show decorators and builders where the movement joints are
Don’t paint over the new sealant unless we’ve said the product is paintable. Many exterior sealants are not designed to be painted and spoil the finish.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
What happens if it’s left?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. Around Blendworth, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first and agree the price before starting.
Why book with us
- Approved under the ARBOMaster scheme
- 180+ five-star Google reviews
- Fully insured
- Every job guaranteed for a year
Take a look at how sealant jobs are priced and what customers say.