Hampshire · England
External & façade joints in Oakhanger, Hampshire
External mastic in Oakhanger from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Damp patches traced to an open external joint
- Weeds or debris growing in open joints
- Joints pointed up with cement by mistake
About our external mastic in Oakhanger
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. If you have gaps where render, brick and frames meet and damp patches traced to an open external joint, we can put it right, on brickwork movement joints, concrete & block and render & cladding joints alike.
Around Oakhanger, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water normally gets in.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Oakhanger (GU35)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Honest limits
In fairness, some problems need a different trade:
- Cracking across the wall rather than at a joint
- Adding movement joints to masonry that has none
- Damp that is not coming from the joint
If in doubt, call 0345 464 0079 or email us and we will say what we think before booking.
Where we work in Oakhanger
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Façade panels
- Concrete & block
Places near Oakhanger
More services for Oakhanger
What affects the cost of external mastic
We don’t publish a price list, because no two jobs are the same. What we look at:
- Whether there’s mould to deal with
- Which sealant suits the joint
- How many rooms, windows or areas are involved
- Whether the work is at height
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What to tell us for a quote
To help us quote quickly, please include:
- Pictures of the joints, sent by email
- The type of property
- Any previous sealing or DIY work
- The rough size of the job
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
External mastic in Oakhanger: local notes
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Homes close to St Mary Magdalene's Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant. Schools such as Mill Chase Academy are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Oakhanger is about 4 miles south-east of Alton, in Hampshire. For external mastic in and around Oakhanger, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We’re based in Crawley and cover Hampshire, Oakhanger included. 683 places in Hampshire are on our list, large and small. There’s also a page for Portsmouth, roughly 23 miles from Oakhanger.
Here we cover the GU35 postcode area for external mastic. If you’re just outside Oakhanger, we cover Hartley Mauditt (2 miles west), East Worldham (2 miles north-west), Wyck (3 miles north), Upper Farringdon (3 miles west) and Neatham (4 miles north-west). Larger places within reach include Basingstoke (13 miles north-west), Farnborough (14 miles north-east), Fleet (11 miles north), Horndean (15 miles south), Aldershot (11 miles north-east) and Alton (4 miles north-west).
Around Oakhanger
The nearest railway station is Alton station, roughly 3.8 miles north-west of the centre. Well-known places in the area include The Romany Museum (2.1 miles south-west) and Chase Community Hospital (1.9 miles east). For a walk, there’s Selborne Hill and Deadwater Valley.
How the job changes by surface
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant if the joint can be cleared.
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. A primer goes on where the product requires one before the bead.
Common problems we fix in Oakhanger
Some movement joints have been pointed up with mortar. The joint cannot move, so the wall cracks somewhere else instead.
The most common problems we see are:
- Rigid filler in a joint that should flex
- Sealant pulling away from one side of the joint
- Hard, crazed mastic that has stopped moving
- Rain getting behind render or cladding at a joint
Letting a property close to Alton station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What your quote should include
- Whether all the old sealant comes out first
- Who turns up on the day
- What the quote includes, VAT included or not
- Which colour the sealant will be
DIY versus a professional finish
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
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.
Oakhanger questions
Will you come out to Oakhanger?
Yes, Oakhanger is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Alton 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.
Will the new joint stand out?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so the joint doesn’t draw the eye.
How much does external mastic cost in Oakhanger?
Size, access and the old material all affect the cost. Call for a quick quote and we will talk you through it.
Do the sealants smell?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Why do you put foam in the joint first?
That’s backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
How long does the job take?
Most jobs take a few hours for a handful of joints, longer for a whole elevation, including the preparation. Your quote will say how long we expect yours to take.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
What we do, step by step
You do not need to clear the whole room or building, just the space around the work. We protect the rest, and the work takes a few hours for a handful of joints, longer for a whole elevation in most cases. In a small place like Oakhanger, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we’ll 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.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about stairs, lifts or work at height
- Tell us about any water getting in
Getting a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or email us.
Related advice
Aftercare tips
Good habits help new joints last longer. A few tips:
- Keep soil, plants and ivy away from the joints
- Act on the first splits you see
- Check the sealant is paintable before painting near it
- Deal with leaking gutters that soak the joints below
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.