Hampshire · England
External & façade joints in South Town, Hampshire
External mastic in South Town from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Joints pointed up with cement by mistake
- Failed seals between different materials
- Joints where the bead has come unstuck
South Town: your questions answered
Is South Town within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
I let a flat near Alton station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Will the old sealant be removed?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
How long does external mastic last?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and reseal when it splits.
Can you seal over the old sealant?
No, it won’t last. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or drop us an email.
What colours does the sealant come in?
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 does not draw the eye.
External mastic for homes and businesses in South Town
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, so it bonds to the two sides only and can stretch. We are often asked to deal with rigid filler in a joint that should flex and sealant that has lost its bond to the brick or render, on render & cladding joints, brickwork movement joints and concrete & block.
In a village or hamlet like South Town, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Every job comes with our one-year guarantee, wherever you are in Hampshire.
- Location
- South Town (GU34)
- Wider area
- Hampshire
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
Most of a good job is in the preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours to a few days, depending on the length of joint and the access. In a small place like South Town, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- Tell us about any water getting in
- Mention any tricky access
- On commercial sites, let us know about site rules
How to get a quote
Want a quote for external mastic? Please ring 0345 464 0079 or send us an email with a few details. We’ll explain what we’d do and send you a clear quote before any work starts.
Advice
Why deal with it now?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way, and access only has to be arranged once. Where a wall is exposed, as many are in small places like South Town, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start.
Why book with us
- White, clear, grey or another colour, product permitting
- Old sealant always removed completely
- 4.9 on Google from 180+ five-star reviews
- One-year guarantee on every job
What external mastic looks like in South Town
Historic houses like Bentworth Hall (about 1.4 miles north-east) are a reminder that the area around South Town has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Alton station? Then outside joints that have cracked can let damp into a rental, so check them between lets. If you look after a building such as Medstead Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around Church of St Andrew, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
South Town is about 4 miles west of Alton, in Hampshire. Homes, rented property, offices and hotels in South Town is covered for external mastic. Every job comes with our 12-month guarantee. South Town is one of 683 places in Hampshire where we work for external mastic. You can also see our page for Southampton, about 20 miles away.
Postcode districts we cover here for external mastic: GU34. Local streets include High Street, Church Lane and Green Stile, and we cover them all. Close by, we work in New Copse (1 mile north), Hattingley (1 mile west), Medstead (1 mile south-east), Soldridge (1 mile south) and Holt End (1 mile north). Larger places within reach include Basingstoke (10 miles north), Winchester (12 miles south-west), Fleet (14 miles north-east), Horndean (15 miles south), Alton (4 miles east) and Petersfield (10 miles south-east).
Landmarks near South Town
The nearest railway station is Alton station, roughly 4.5 miles east. Nearby you will also find Barton Castle (2.2 miles west) and Alton Community Hospital (3.4 miles east). Open spaces near South Town include King's Hill.
Different surfaces, different methods
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so its sealant has to stay flexible.
Also in South Town
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Show decorators and builders where the movement joints are
- Clear growth from the base of walls and joints
- Get split or bare joints resealed while the damage is small
- Deal with leaking gutters that soak the joints below
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
When it is not the sealant
Sealant isn’t the answer to every problem, and we’ll tell you before any work starts. It won’t solve:
- Cracking across the wall rather than at a joint
- Failed render or damaged cladding panels
- Damp that is not coming from the joint
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think before booking.
What we seal
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Copings & trims
Quotes for external mastic in South Town
For a quick quote, just ask. What matters most is:
- The number and length of the joints
- Mould in or behind the old joints
- The old material and how stubborn it is
- Working hours on commercial sites
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, call 0345 464 0079 or email us and we will give you an honest view and a quote.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- If someone has resealed it before
- How we’d reach the joints
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or drop us an email with the details.