Hampshire · England
South Hayling External Mastic
External mastic for South Hayling, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Weeds or debris growing in open joints
- Joints pointed up with cement by mistake
- Rain getting behind render or cladding at a joint
About our external mastic in South Hayling
For buildings in South Hayling, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. Typical jobs include sealant that has lost its bond to the brick or render and failed sealant between panels on a façade, across façade panels, copings & trims and brickwork movement joints.
In a smaller place like South Hayling, some homes face open ground, and walls and rooflines facing the weather take the worst of it. That’s where gutter joints and wall joints tend to fail first.
Big or small, you get the same 12-month guarantee.
- Place
- South Hayling (PO11)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Common questions in South Hayling
I let a flat near Fratton station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Do you cover smaller places like South Hayling?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What does external mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little.
Does someone need to be in?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Is it OK to seal over old sealant?
No, it will not last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Can I add another job to the visit?
Yes, we can. More than one area can be quoted together.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
Nearby places to South Hayling
Other services in South Hayling
Aftercare tips
Looking after new joints is easy:
- Check external joints each spring
- Check the sealant is paintable before painting near it
- Deal with leaking gutters that soak the joints below
- Get split or bare joints resealed while the damage is small
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Small splits are the time to act. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
What we can’t put right
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracks in the bricks or render themselves, away from the joints
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly before you book.
What we seal
- Concrete & block
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Façade panels
Different surfaces, different methods
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joints work hard every day. We choose the product to suit.
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
If you manage several properties in or around South Hayling, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
What affects the quote in South Hayling
There’s no set price list. The quote depends on:
- The size of the job
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
- The product the joint needs
What it costs 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.
Asking for a quote
When you contact us, it’s useful to know:
- How we’d reach the joints
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- If someone has resealed it before
Want a quote for external mastic? Please phone 0345 464 0079 or email us with a few details. We will explain what we’d do and give you a clear quote before work begins.
The process
When we arrive, we start by going over the job with you. Surfaces next to the work are protected before any work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. For a job in South Hayling, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Mention any tricky access
- Tell us about any water getting in
- Let us know about parking restrictions
Getting a quote
For a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. You’ll have a clear quote before any work starts.
Advice
South Hayling buildings and the weather
South Hayling is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as Mengham Junior School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. If you live in an older home near St Mary's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Letting a property close to Fratton station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
South Hayling is about 5 miles east of Portsmouth, in Hampshire. Every kind of property in South Hayling can book us for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. 683 places in Hampshire are on our list.
Postcode districts we cover here for external mastic: PO11. Whether your property is on Church Road, Station Road and St Leonard's Avenue or a nearby road, we can help. We also cover West Town (1 mile west), Tourner Bury (1 mile north-east), Tye (2 miles north), Stoke (2 miles north) and North Hayling (2 miles north). We also work in nearby towns such as Gosport (8 miles west), Havant (5 miles north), Fareham (11 miles north-west), Horndean (8 miles north), Waterlooville (7 miles north) and Petersfield (15 miles north).
Around South Hayling
In South Hayling, that means homes and buildings near Newton House Hotel, The Hayling College and The Hayling College and the streets around them. For rail, the closest station is Fratton station, about 4.3 miles west of the centre. A little further out are St James Hospital (3.3 miles west) and Eastney Beam Engine House (3.1 miles west). The countryside around South Hayling includes Hayling Billy.