Hampshire · England
Gutter, fascia & soffit sealing in Southwick, Hampshire
Problem with your gutter and fascia joints in Southwick? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Failed sealant on a garage door frame
- Open joints in fascias and soffits
- Old sealant on roofline trims that has split
Gutter sealing in Southwick, done properly
Gutter and fascia replacement isn’t our trade, and nor is roofing. What sealant does is close joints and it can’t mend broken brackets, split sections or blocked downpipes. We work on garage door frames, uPVC fascias and roofline trims, and the jobs we see most are quick sealant fixes on gutters that didn’t last and rain getting in around a garage door.
Outside joints can only be sealed when they’re dry, so work in Southwick is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
There’s a 12-month guarantee on every job.
- Place
- Southwick (PO17)
- Wider area
- Hampshire
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work can’t fix
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Brackets that have snapped or loosened
- A gutter length that has split
- Rotten or damaged fascia boards
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Gutter end caps
- Roofline trims
- Gutter joints
- Garage door frames
- uPVC fascias
- Soffit joints
What we do, step by step
We bring everything the job needs with us. After a quick look at the joints together, the area is protected and the work begins. Most jobs take anything from an hour or two to a few hours. Somewhere like Southwick needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First we trace the drip and check the gutter isn’t damaged.
- The old sealant and dirt are cleaned out of the joint.
- We dry the joint so the new sealant can bond.
- A gutter sealant is applied to the joint.
- We check the run and clear debris near the joints.
How to prepare
- Clear items away from the joints we are working on
- Tell us about any water getting in
- Mention any sign-in or site rules at work premises
Getting a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Read more
What we’re called out for in Southwick
A sealant applied to a damp or dirty joint will not bond. Some quick repairs peel off within a season or two.
Common reasons people contact us are:
- Trim joints where the sealant has failed
- Open joints in fascias and soffits
- Garage door frames letting rain in
- Internal damp traced to a gutter joint
For site and facilities teams at buildings such as King Richard School, its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- Whether they’re fully insured
- How the joint is cleaned and prepared
- What happens if they find a problem under the old sealant
- Which sealant they’ll use, and why
Keeping the joints in good condition
So the new joints stay in good condition:
- Watch the wall under the gutters for staining
- Deal with a drip before winter
- Check that water runs out of the downpipes
- Look at the gutters while it’s raining
Clear the gutters once or twice a year so water doesn’t sit on the joints. Water left in a gutter tests every joint.
Once roofline sealant splits, water can get behind it. Sealing it early keeps the boards behind dry and the wall below.
Why act early in Southwick
Sealing over a dirty, wet joint is a quick fix that rarely lasts, but it soon lets go. Cleaning out and drying the joint first is what makes it last. Older cottages and farmhouses around Southwick can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Southwick clients choose us
- White, clear, grey or another colour, product permitting
- Over 20 years’ experience
- Approved under the ARBOMaster scheme
- One-year guarantee on every job
See what affects the cost and customer reviews.
How we quote for gutter sealing
We don’t publish a price list, because no two jobs are the same. The quote depends on:
- How much old sealant there is and how hard it is to remove
- When we can work, for business premises
- Whether there’s mould to deal with
- Access and height
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Asking for a quote
When you call or email, it’s useful to know:
- Where the property is
- Photos by email, if that’s easy
- Roughly how big the job is
- The type of property
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, call 0345 464 0079 or send us an email.
Gutter sealing in Southwick: local notes
Southwick is within about 2 miles of 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 gutter, fascia and roofline 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Homes close to Church of St James Without the Priory Gate include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant. Letting a property close to Portchester station? Then a gutter joint that drips onto the wall can turn into a damp complaint, so it’s worth checking.
Southwick is about 3 miles west of Purbrook, in Hampshire. For gutter sealing in and around Southwick, it’s easy to get a quote: please ring 0345 464 0079 or email us. We’re based in Crawley and cover Hampshire. Southwick is one of 683 towns and villages in Hampshire we cover for gutter sealing.
Jobs for gutter sealing in PO17 works the same way as everywhere else we cover. Whether your property is on High Street, North Road West and Castle Road or anywhere close by, our applicators can take on the job. We also cover the places around Southwick: Boarhunt (1 mile west), North Boarhunt (2 miles north-west), Portchester (2 miles south), Hundred Acres (3 miles north-west) and North Fareham (3 miles west). Within a short drive, we also cover Gosport (5 miles south), Havant (5 miles east), Eastleigh (12 miles north-west), Fareham (4 miles west), Horndean (5 miles north-east) and Chandler's Ford (14 miles north-west).
Landmarks near Southwick
Typical jobs here are in homes near Red Lion Inn and the streets around them. For rail, the closest station is Portchester station, about 1.9 miles south of the centre. Well-known places in the area include Portchester Castle (2.6 miles south) and Fareham Shopping Centre (3.2 miles south-west). For a walk, there’s Portsdown Hill and St Clair's Meadow.
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
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FAQs for Southwick
Is Southwick within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Portchester station?
Yes. We work for landlords and letting agents as well as householders. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
How much does gutter sealing cost in Southwick?
It depends on the job, so we quote each one individually. To get one, call 0345 464 0079 or email us with a short description of the job.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Can I add another job to the visit?
Yes. Just list everything you need and we’ll quote it together.
Are you insured?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Do you offer different sealant colours?
Yes. Sealants come in white, clear, grey and other colours, and we agree the colour with you before we start.
Is the work guaranteed?
You get our 12-month guarantee to all our work.