Hampshire · England
External Mastic in Sprat's Down
Professional external mastic in and around Sprat's Down, with old sealant always removed completely and a 12-month guarantee.
- Weeds or debris growing in open joints
- Rigid filler in a joint that should flex
- Old sealant gone brittle and cracked
What the job involves on each surface
Copings and trims
A failed coping joint lets water into the top of the wall. Sealing them early saves the wall below.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
How we handle external mastic in Sprat's Down
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a colour to suit. If you’re dealing with sealant pulling away from one side of the joint and panel joints letting water in, we can put it right, whatever the surface.
Somewhere as small as Sprat's Down, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
Big or small, it’s backed by our one-year guarantee.
- Where
- Sprat's Down (SO45)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What external mastic looks like in Sprat's Down
Sprat's Down is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as Fawley Infant School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around St George, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For landlords with property near Hamble station, outside joints that have cracked can let damp into a rental, so check them between lets.
Sprat's Down is about 4 miles north of Cowes, in Hampshire. Homes, rented property, offices and hotels in Sprat's Down is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Sprat's Down is one of 683 towns and villages in Hampshire where we work. Southampton is on our list too, around 8 miles away.
Our applicators cover all of SO45 for external mastic. Close by, we work in Calshot (1 mile east), Stonehills (1 mile north), Stanswood (1 mile south), Hillhead (1 mile east) and Ashlett (1 mile north). Larger places within reach include Gosport (8 miles east), Eastleigh (11 miles north), Fareham (7 miles north-east), Totton (10 miles north-west), Chandler's Ford (12 miles north) and Hedge End (7 miles north).
Around Sprat's Down
In Sprat's Down, that means homes and buildings near Falcon Hotel and the streets around them. Sprat's Down’s nearest station is Hamble station, roughly 4 miles north of the centre. Nearby you will also find Calshot Castle (1.6 miles east) and Sir Max Aitken Museum (3.9 miles south-east). Not far away are Mercury Marshes and Mill Hill.
Other services in Sprat's Down
DIY versus a professional finish
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.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Leave it or put it right?
Sealing over the top of old mastic does not hold for long. New sealant does not bond well to old, weathered sealant, so we always take the old sealant out. Older cottages and farmhouses around Sprat's Down can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
What you get with us
- Homes, businesses and hotels
- Every job guaranteed for a year
- Neat joints and a tidy finish
- Over 20 years’ experience
See our cost guide or customer reviews.
Honest limits
To be straight with you, there are a few things sealant won’t fix:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before booking.
What we seal
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
- Copings & trims
- Render & cladding joints
FAQs for Sprat's Down
Can you help a landlord with a rental near Hamble station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Does the coastal weather in Sprat's Down affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
What does external mastic cost?
We do not 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 will get a clear quote before work begins.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
How do you reach high-level joints?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher work, tell us about the building and we will confirm what’s needed.
Do you have insurance?
Yes. Full insurance covers our work.
What do you need from me for a quote?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or send us an email.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
What affects the quote in Sprat's Down
The quote reflects the job in front of us. We take into account:
- Access and height
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
- The number of rooms or windows
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- The rough size of the job
- What’s wrong with the joints now
- The type of property
- Where the job is, and your postcode
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
How it works
Good joint work is mostly preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it usually takes a few hours to a few days, depending on the length of joint and the access. In a small place like Sprat's Down, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Let us know about earlier repairs to the joints
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Every job is quoted individually, so start by telling us what you need. Just call 0345 464 0079 or drop us an email with the details and send pictures if you have them.
Advice
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.