West Sussex · England
Gutter Sealing in Southbourne
Gutter sealing in Southbourne from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Stop ends leaking at the end of a run
- Old sealant on roofline trims that has split
- Damp on an inside wall under a dripping gutter
What the job involves on each surface
Garage door frames
Resealing a garage door frame keeps rain and draughts out.
Gutter end caps
We seal end caps from the inside where we can reach, after cleaning and drying.
How we handle gutter sealing in Southbourne
It’s easy to live with a dripping gutter joint, but the water lands on the same spot every time it rains. Resealing it is a small job while the gutter is still sound. If you are dealing with failed sealant on a garage door frame and quick sealant fixes on gutters that didn’t last, we can help, whatever the surface.
Houses in smaller places like Southbourne can stand more in the open than those in a built-up town, so exposed walls and rooflines take more wind-driven rain. Joints on those sides are generally the first to go.
Our work is backed for twelve months.
- Place
- Southbourne (PO10)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Walls and rooflines in Southbourne
Southbourne is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on gutter, fascia and roofline joints, especially on the side facing the sea. Historic houses like Warblington Castle (about 2.5 miles west) are a reminder that the area around Southbourne 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.
Schools such as Southbourne Junior School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. In the older streets around St. John's, an extension built onto an older house moves differently, and the joint between them takes the strain. If you let a flat or house near Southbourne station, leaking gutter joints on a rental are best caught before they stain the walls.
Southbourne is about 4 miles east of Havant, in West Sussex. From the centre of Southbourne to the outskirts, gutter sealing is available for homes and businesses alike, from flats and houses to offices and hotels. 371 places in West Sussex are on our list, large and small. For nearby work, see our Portsmouth page, about 8 miles away.
Work in PO10 is quoted and booked the same way as anywhere else. You’ll find streets such as Lodgebury Close, Manor Road and Northcote Gardens, and we cover them all. Other places close to Southbourne include Woodmancote (1 mile north), Lumley (1 mile west), Westbourne (1 mile north-west), Emsworth (1 mile west) and Thorney Island (2 miles south-west). We also work in nearby towns such as Bognor Regis (11 miles south-east), Chichester (6 miles east), Selsey (10 miles south-east), Portfield (6 miles east), Yapton (13 miles east) and East Wittering (6 miles south).
Near you in Southbourne
Around Southbourne, our work takes us to homes and buildings near The Traveller's Joy Public House, Eames Farm and Bourne Community College, among other places. There’s a railway station in Southbourne itself: Southbourne station. Other landmarks nearby include Warblington Castle (2.5 miles west) and Emsworth Museum (1.3 miles west). Not far away are Stoke Down and Brook Meadow (Emsworth).
When it is not the sealant
To be straight with you, there are a few things sealant won’t fix:
- Blocked downpipes
- Rotten or damaged fascia boards
- A gutter length that has split
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
Joints and surfaces we work on
- Roofline trims
- Gutter joints
- Soffit joints
- Garage door frames
- Gutter end caps
- uPVC fascias
How we quote for gutter sealing
We quote each job individually. These are the things that affect it:
- The number of rooms or windows
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
- The number and length of the joints
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Any previous sealing or DIY work
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
Want a quote for gutter sealing? Please phone 0345 464 0079 or email us with a few details. We will explain what we’d do and give you a clear price before any work starts.
Places near Southbourne
Also in Southbourne
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Clean out the gutters once or twice a year
- Keep downpipes clear
- Look along the fascias for open joints
- Rest ladders on the wall, not the gutter
Look at fascia and trim joints when you are checking the gutters. Splits are easier to seal early.
Once roofline sealant splits, water can get behind it. Sealing it early keeps the boards behind dry and the wall below.
What happens on the day
On the day, we look over the joints with you first. We protect the surfaces around the joints before any work starts. Most jobs take a few hours, depending on the number of joints and the access. For a job in Southbourne, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First we agree which joints need sealing.
- We clean out each joint.
- The joints are dried.
- We apply exterior or gutter sealant and finish it neatly.
- The joints are checked once sealed.
Preparing for the visit
- Tell us about any water getting in
- Try not to wet indoor joints just before the visit
- Mention any sign-in or site rules at work premises
Ask for a quote
Asking for a quote is easy: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Advice
DIY versus a professional finish
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. All the old material has to come out first.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Questions from Southbourne
Is Southbourne within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Southbourne station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Do you have insurance?
Yes. We’re fully insured for domestic and commercial work.
Can sealant stop a sagging gutter leaking?
Not for long. The joint will pull apart, so the fall and brackets need sorting first.
Do you seal gaps in fascias and soffits?
Yes. We seal open joints along fascias and soffits in a matching colour.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
Leave it or put it right?
New gutters cost far more than a few resealed joints. If the gutter is sound and the drip is a joint a reseal is all it needs. If it has failed, we’ll tell you. In a smaller place like Southbourne, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
The cost depends on the amount of work, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts.
Why book with us
- 4.9 on Google from 180+ five-star reviews
- A sealant colour to suit the surroundings
- Neat joints and a tidy finish
- Homes, businesses and hotels
Take a look at our cost guide and what customers say.