West Sussex · England
Gutter Sealing in Thorney Island
Professional gutter sealing in and around Thorney Island, with every bit of old sealant taken out first and a 12-month guarantee.
- Trim joints where the sealant has failed
- Streaks down the brickwork from a leaking joint
- Quick sealant fixes on gutters that didn’t last
Gutter sealing in Thorney Island, done properly
A lot of gutter leaks come down to one tired joint. The joint is cleaned, dried and resealed with a sealant made for guttering. If the gutter itself has failed, we say so. If you have fascia boards with gaps between them and quick sealant fixes on gutters that didn’t last, we can help, whatever the surface.
Outside joints can only be sealed when they’re dry, so work in Thorney Island is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or drop us an email.
- Where
- Thorney Island (PO10)
- Region
- West Sussex
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Questions from Thorney Island
Does living near the coast affect gutter sealing in Thorney Island?
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.
Is Thorney Island within the area you cover?
Yes, Thorney Island is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
How do I get a quote for gutter sealing in Thorney Island?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Is it possible to stop a gutter joint dripping with sealant?
Most of the time. If the gutter is sagging or cracked, sealing won’t last, and we’ll tell you.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will tell you what we are using.
How the job changes by surface
Garage door frames
A fresh seal around the frame stops rain getting in.
Gutter end caps
Stop ends hold back water at the end of a run. A failed seal makes them leak.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Deal with a drip before winter
- Keep ladders off the guttering
- Check that water runs out of the downpipes
- Watch for drips in a downpour
Keep downpipes clear so the gutter can drain. A blocked pipe backs water up to the joints.
Split sealant on fascias and trims lets water in behind. Resealing early protects the boards and the wall below.
Can I do it myself?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
A careful DIYer can reseal a simple joint, 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.
What happens if it’s left?
Replacing fascias because of open joints is normally unnecessary. Sealing the joints tidies them up as long as the boards are in good condition. Older cottages and farmhouses around Thorney Island can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
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 play a part.
Why choose Mr Mastic in Thorney Island
- One-year guarantee on every job
- Full insurance on every job
- Rated 4.9 stars on Google
- Approved under the ARBOMaster scheme
Take a look at how sealant jobs are priced and our reviews.
The process
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take an hour or two for a few joints, longer for a full run. Somewhere like Thorney Island needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by tracing the leak and checking the gutter itself is sound.
- The joint or trim is cleaned out and old sealant removed.
- We make sure the joint is dry before sealing.
- Gutter or exterior sealant is applied and finished.
- We look along the gutter and clear debris around the joints.
How to prepare
- Keep pets and children clear of the area while we work
- Tell us about access, such as stairs, a lift or high-level joints
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Every job is quoted individually. Just phone 0345 464 0079 or send us an email with the details, and photos are welcome.
Read more
Places near Thorney Island
Also in Thorney Island
When it is not the sealant
We will always be straight with you, so here’s what sealant cannot fix:
- A gutter length that has split
- Downpipes that are blocked or broken
- Roof leaks, slipped tiles or failed flashing (a roofer’s job)
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Joints and surfaces we work on
- uPVC fascias
- Gutter joints
- Gutter end caps
- Roofline trims
- Garage door frames
- Soffit joints
What gutter sealing looks like in Thorney Island
Thorney Island is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on gutter, fascia and roofline joints, which can dry out and crack sooner where a building faces the weather. With historic houses such as Warblington Castle (about 2.1 miles north-west) nearby, there’s older building stock in the area around Thorney Island as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
For site and facilities teams at buildings such as Thorney Island Community Primary School, larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Southbourne station, a gutter joint that drips onto the wall can turn into a damp complaint, so it’s worth checking.
Thorney Island is about 4 miles south-east of Havant, in West Sussex. We carry out gutter sealing for householders, landlords and businesses in Thorney Island. Thorney Island is one of 371 places in West Sussex where we work. Portsmouth is on our list too, around 7 miles away.
Every address in PO10 is within our area for gutter sealing, from the main roads to the quietest streets. If you need gutter sealing at a property on Hunter Road, Emsworth Road and Spartan Close or a nearby road, we can help. Other places close to Thorney Island include West Thorney (1 mile south-east), North Hayling (1 mile west), Tye (1 mile south-west), Northney (1 mile west) and Emsworth (2 miles north). We also work in nearby towns such as Bognor Regis (11 miles east), Chichester (7 miles east), Selsey (9 miles south-east), Portfield (7 miles east), Yapton (14 miles east) and East Wittering (5 miles south-east).
Around Thorney Island
In Thorney Island, that means homes and buildings near Bourne Community College and Eames Farm, among other places. The nearest railway station is Southbourne station, about 1.8 miles north-east of the centre. Other landmarks nearby include Havant War Memorial Hospital (3.2 miles north-west) and Emsworth Museum (1.6 miles north). Open spaces near Thorney Island include Nutborne Marshes.
What we are called out for in Thorney Island
End caps get knocked or pushed by water. If the seal fails, water escapes at the end.
Any of these means the joints need attention:
- Earlier gutter repairs that have peeled off
- Streaks down the brickwork from a leaking joint
- Garage door frames letting rain in
- Trim joints where the sealant has failed
In the older streets around The Parish Church of St Nicholas, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What to look for in a quote
- Who turns up on the day
- How long the guarantee is
- What the quote includes, VAT included or not
- How long to leave it before use