Hampshire · England
External & façade joints in Hunton, Hampshire
Sealing brickwork movement joints, render, cladding and façade joints in Hunton, with a one-year guarantee on every job. Call for a quick quote.
- Water getting into walls through failed joints
- Movement joints with cracked, split or missing sealant
- Weathered mastic that no longer stretches
How we handle external mastic in Hunton
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. Common call-outs are for joints pointed up with cement by mistake and moss and dirt in joints with no sealant left, on concrete & block, copings & trims and façade panels.
Outside joints can only be sealed when they’re dry, so work in Hunton is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
All of our work is guaranteed for twelve months.
- Location
- Hunton (SO21)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Walls and rooflines in Hunton
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Micheldever station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Hunton is about 7 miles north of Winchester, in Hampshire. Every kind of property in Hunton can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Across Hampshire, we cover 683 places, Hunton among them. Southampton is on our list too, around 17 miles away.
Every address in SO21 is within our area for external mastic, from the main roads to the quietest streets. We also cover the places around Hunton: Stoke Charity (1 mile south-east), Egypt (1 mile west), Sutton Scotney (1 mile west), South Wonston (3 miles south) and Barton Stacey (3 miles west). Further out, we also cover Basingstoke (12 miles north-east), Winchester (7 miles south), Eastleigh (13 miles south), Andover (8 miles north-west), Chandler's Ford (12 miles south) and Alton (15 miles east).
Landmarks near Hunton
Around Hunton, our work takes us to homes and buildings near The Wonston Arms and the streets around them. The nearest railway station is Micheldever station, roughly 2.9 miles north-east of the centre.
Common problems we fix in Hunton
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, and it tears off the sides.
Keep an eye out for any of the following:
- Rigid filler in a joint that should flex
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
- Failed sealant between panels on a façade
For an older house near a landmark such as Church of St James, an extension built onto an older house moves differently, and the joint between them takes the strain.
What to look for in a quote
- How the surfaces are prepared before sealing
- The length of the guarantee
- Is the old sealant removed completely?
- Who does the work, and how experienced they are
Leave it or put it right?
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. Around Hunton, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in Hunton
- 180+ five-star Google reviews
- 20+ years of sealant experience
- 12-month guarantee on every job
- Colour agreed with you before we start
See how sealant jobs are priced and our reviews.
Landlords, agents and businesses in Hunton
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can go on one quote.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
DIY versus a professional finish
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.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What the job involves on each surface
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. The sealant is chosen with that in mind.
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.
The process
On the day, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. In a small place like Hunton, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, phone 0345 464 0079 or email us.
Advice
Towns and villages near Hunton
What else we do in Hunton
FAQs for Hunton
I let a flat near Micheldever station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear quote.
Do you cover Hunton for external mastic?
Yes. Our work covers London and the South East, and Hunton is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
When will the joints need doing again?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges and have them redone then.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient.
Should I point up the gap in my brickwork?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Where do you work from?
Mr Mastic is based in Crawley. We cover Hunton and the rest of Hampshire.
Is it OK to seal over old sealant?
No, it will not last. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
How to look after the new joints
A little care helps the new joints last. We recommend:
- Wash walls gently around the sealant
- Clear growth from the base of walls and joints
- Show decorators and builders where the movement joints are
- Ask before painting over external sealant
Don’t paint over the new sealant unless we have said the product is paintable. Paint can crack on a flexible joint.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.