Hampshire · England
Old Alresford External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Old Alresford and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Panel joints letting water in
- Plants rooting in failed movement joints
- Joints pointed up with cement by mistake
External mastic in Old Alresford, done properly
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall. If you have hard, crazed mastic that has stopped moving and joints with sealant missing in places, we can put it right, whatever the surface.
Around Old Alresford, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Whatever the size of the job, it’s backed by our 12-month guarantee in Old Alresford and across Hampshire.
- Where
- Old Alresford (SO24)
- Region
- Hampshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Old Alresford buildings and the weather
Historic houses like Hinton Ampner House (about 4.1 miles south) are a reminder that the area around Old Alresford 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain.
Old Alresford is about 7 miles north-east of Winchester, in Hampshire. Anywhere in SO24, our applicators can take on external mastic. Across Hampshire, we cover 683 places, and Old Alresford is one of them. You can also see our page for Southampton, roughly 16 miles from Old Alresford.
Postcode districts we cover here for external mastic: SO24. We cover properties on Kiln Lane, Colden Lane and The Brook and the roads around them. If you’re just outside Old Alresford, we cover Bighton (1 mile east), Northington (2 miles north-west), Totford (3 miles north-west), Brown Candover (3 miles north) and Upper Wield (4 miles north-east). We also work in nearby towns such as Basingstoke (11 miles north), Winchester (7 miles south-west), Eastleigh (12 miles south-west), Horndean (15 miles south-east), Chandler's Ford (13 miles south-west) and Alton (9 miles east).
Around Old Alresford
Around Old Alresford, our work takes us to homes and buildings near The Globe Inn. Well-known places in the area include Barton Castle (3.1 miles north-east).
How the visit works
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours to a few days, depending on the length of joint and the access. Somewhere as small as Old Alresford, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for 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
- Tell us if parking is tricky
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us about any previous sealing or DIY attempts
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.
Related advice
Common questions in Old Alresford
Can you do external mastic in Old Alresford?
Yes. Our work covers London and the South East, and Old Alresford is part of that. Just call 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.
Will you come out to Old Alresford?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
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.
What information do you need?
Let us know what needs doing and where, plus photos if you have them. If we need more, we’ll ask.
Are you insured?
Yes. Full insurance covers our work.
Is the work guaranteed?
Yes. There’s a 12-month guarantee on every job, large or small.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Places near Old Alresford
Other services in Old Alresford
Do you need external mastic in Old Alresford?
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
These are the problems we are asked about most:
- Rigid filler in a joint that should flex
- Plants rooting in failed movement joints
- Failed sealant between panels on a façade
- Rain getting behind render or cladding at a joint
For site and facilities teams at buildings such as Perins School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- Is VAT in the price?
- Whether the sealant suits the joint
- When the joint can take water or movement
- What insurance they hold
Can I do it myself?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Clear growth from the base of walls and joints
- Deal with leaking gutters that soak the joints below
- Point out the joints to other trades
- Check the sealant is paintable before painting near it
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
Different surfaces, different methods
Concrete and blockwork
The face of concrete or block is often dusty, so preparation is key. A primer goes on where the product requires one.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
What we cannot put right
A few problems are outside what sealant work can do:
- Cracking across the wall rather than at a joint
- Damp that isn’t coming from the joint
- Loose or hollow render, which needs re-rendering
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Concrete & block
- Joints between brick and frames
- Copings & trims
Landlords, agents and businesses in Old Alresford
We also work for property managers and facilities teams in Old Alresford and across Hampshire. We can quote a run of properties together.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.