Hampshire · England
Newfound External Mastic
External mastic across Newfound and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Leaking joints around cladding and façade panels
- Hard, crazed mastic that has stopped moving
- Joints pointed up with cement by mistake
About our external mastic in Newfound
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. Common call-outs are for sealant pulling away from one side of the joint and rain getting behind render or cladding at a joint, on brickwork movement joints, copings & trims and concrete & block.
Older homes in small places like Newfound may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Location
- Newfound (RG23)
- Region
- Hampshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Newfound questions
Is Newfound within the area you cover?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you do external mastic in Newfound?
Yes. We work across London and the South East, and Newfound is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Are you ARBOMaster approved?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Can landlords and businesses book you?
Yes, we do. We work in homes, commercial premises and hotels.
What is backing rod for?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back.
Should I point up the gap in my brickwork?
No. A mortar-filled joint can’t move, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
What colours does the sealant come in?
The sealant colour is picked to suit the wall so the joint blends in. There’s a wide choice of exterior colours.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and we will quote it together.
What external mastic looks like in Newfound
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as The Vyne (about 4.8 miles north-east) nearby, there’s older building stock in the area around Newfound as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
For an older house near a landmark such as St John's, older walls, gutters and the joints where extensions meet them need a flexible sealant. For landlords with property near Basingstoke station, outside joints that have cracked can let damp into a rental, so check them between lets.
Newfound is about 3 miles west of Basingstoke, in Hampshire. Whether you’re in the middle of Newfound or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Across Hampshire, we cover 683 places, and Newfound is one of them. Our Reading page covers work nearby.
All of RG23 is within our area for external mastic, from the main roads to the quietest streets. Streets in the area include Fox Lane, Dellfield and Foxmoor Close, all of which we cover. We also cover the places around Newfound: Oakley (1 mile south-west), Worting (1 mile east), Buckskin (1 mile east), Kempshott (2 miles south-east) and Ibworth (2 miles north-west). Larger places within reach include Basingstoke (3 miles east), Winchester (15 miles south-west), Fleet (14 miles east), Andover (14 miles west), Alton (11 miles south-east) and Yateley (15 miles east).
Near you in Newfound
Around Newfound, our work takes us to homes and buildings near The Fox pub and Bishop Challoner Catholic Secondary School and the streets around them. The closest station to Newfound is Basingstoke station, roughly 3.5 miles east of the centre. Well-known places in the area include The Malls (3.5 miles east) and Willis Museum (3.5 miles east). Open spaces near Newfound include Daneshill Park Woods and Farleigh Hill.
Places near Newfound
What else we do in Newfound
What the job involves on each surface
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind.
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it generally takes a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Newfound, the journey is planned in advance: let us know about lanes, gates and parking. 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Clear items away from the joints we’re working on
- Keep pets and children clear of the area while we work
- On commercial sites, let us know about site rules
Ask for a quote
Every job is quoted individually. Simply call 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
Advice
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Do you need external mastic in Newfound?
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
Signs it’s time to call us include:
- Leaking joints around cladding and façade panels
- Cracked joints where brick meets render or frames
- Water getting into walls through failed joints
- Brick movement joints where the sealant has split
For site and facilities teams at buildings such as Oakley Infant School, its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- Is VAT in the price?
- How much experience the applicator has
- What happens if they find a problem under the old sealant
- How long to leave it before use
How to look after the new joints
So the new joints stay in good condition:
- Deal with leaking gutters that soak the joints below
- Get split or bare joints resealed while the damage is small
- Keep movement joints as flexible joints, not mortar
- Walk round the building once a year and look at the joints
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Act while the splits are small. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
What sealant work can’t fix
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Cracked brickwork or render that needs a builder or plasterer
- Subsidence or other structural problems
- Walls that need new movement joints cut into them
If you’re not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Façade panels
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
Quotes for external mastic in Newfound
The quote reflects the job in front of us. We take into account:
- How many rooms, windows or areas are involved
- The product the joint needs
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
What you pay reflects the work, not guesswork. That’s why we ask about the job first.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Any previous sealing or DIY work
- How many joints, rooms or windows are involved
- How we’d reach the joints
- Where the job is, and your postcode
To get a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.