Hampshire · England
External & façade joints in South Harting, Hampshire
Professional external mastic in and around South Harting, with old sealant always removed completely and a 12-month guarantee.
- Gaps where render, brick and frames meet
- Weathered mastic that no longer stretches
- Rigid filler in a joint that should flex
External mastic for homes and businesses in South Harting
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a matching colour. Typical jobs include joints pointed up with cement by mistake and sealant that has lost its bond to the brick or render, across façade panels, brickwork movement joints and render & cladding joints.
Somewhere as small as South Harting, 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.
Big or small, you get the same 12-month guarantee.
- Place
- South Harting (GU31)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
When it is not the sealant
We’ll always be straight with you, so here’s what sealant cannot fix:
- Cracking across the wall rather than at a joint
- Rising or penetrating damp from elsewhere in the wall
- Adding movement joints to masonry that has none
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before booking.
Joints and surfaces we work on
- Joints between brick and frames
- Copings & trims
- Façade panels
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
How the visit works
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the work takes a few hours for a handful of joints, longer for a whole elevation in most cases. For a village or hamlet like South Harting, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Move anything stored near the joints
- On commercial sites, let us know about site rules
How to get a quote
If you’re in South Harting and need external mastic, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Advice
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
What affects the quote in South Harting
The price is agreed before any work begins. It takes into account:
- Any mould that needs treating
- The size of the job
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
The cost depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
- Whether it’s a home or a business
- The address or postcode of the job
Want a quote for external mastic? Please call 0345 464 0079 or email us with a few details. We will explain what we’d do and give you a clear quote before we start.
South Harting: your questions answered
Do you cover smaller places like South Harting?
Yes. South Harting is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover South Harting for external mastic?
Yes, South Harting is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we will confirm what’s needed.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
How do I get a quote for external mastic in South Harting?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before work begins.
Do the sealants smell?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
How long does external mastic take?
Typically it takes anything from a few hours to several days, depending on the building. Bigger jobs take longer.
How to look after the new joints
A little care helps the new joints last. We recommend:
- Ask before painting over external sealant
- Tell anyone working on the walls about the movement joints
- Have failed joints looked at early
- Never let anyone fill a movement joint with mortar
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
What happens if it’s left?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render near the open joint, so the damage spreads beyond the joint. Around South Harting, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
What you get with us
- Trusted Arbo and Everbuild sealants
- Over 20 years’ experience
- Colour agreed with you before any work starts
- Fully insured
Take a look at our cost guide and our reviews.
Landlord and commercial work in South Harting
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
If you manage several properties in or around South Harting, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and pictures by email help.
Outside joints around South Harting
Historic houses like Uppark (about 1.2 miles south-west) are a reminder that the area around South Harting 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. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as The Parish Church of St Mary & St Gabriel, the joints between older walls, newer extensions and the roofline need a sealant that can move. If you let a flat or house near Petersfield station, split movement joints are easy to miss on a rental until damp shows inside. Schools such as Harting CofE Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
South Harting is about 3 miles south-east of Petersfield, in Hampshire. Homes, rented property, offices and hotels in South Harting is covered for external mastic, old or new, large or small. Every job comes with our one-year guarantee. South Harting is one of 683 towns and villages in Hampshire where we work. You can also see our page for Portsmouth, roughly 14 miles from South Harting.
Jobs for external mastic in GU31 works the same way as everywhere else we cover. Streets in the area include The Square, Smithfield and Mill Lane, all of which we cover. We also cover East Harting (1 mile east), Nyewood (2 miles north-east), Elsted (2 miles east), Compton (3 miles south) and Dumpford (3 miles north-east). Further out, we also cover Havant (9 miles south-west), Horndean (7 miles south-west), Alton (13 miles north), Waterlooville (9 miles south-west), Petersfield (3 miles north-west) and Purbrook (10 miles south-west).
Local landmarks in South Harting
Around South Harting, our work takes us to homes and buildings near The Ship Inn. The closest station to South Harting is Petersfield station, roughly 3.7 miles north-west. Nearby you’ll also find Bear Museum (3.3 miles north-west) and Petersfield Community Hospital (3.6 miles north-west). Not far away are Iping and Stedham Commons and Oakham Hill.