Southampton · England
Portswood Gutter Sealing
Sealing leaking gutter joints, end caps, fascias, soffits and roofline trims for householders, landlords and businesses in Portswood. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Garage door frames letting rain in
- Cracked sealant along roofline trims
- Damp on an inside wall under a dripping gutter
Aftercare tips
So the new joints stay in good condition:
- Keep downpipes clear
- Get a dropping gutter looked at quickly
- Keep an eye out for wet patches below a joint
- Deal with a drip before winter
If a gutter starts to sag, get the brackets looked at. If it drops, the joints will open.
Leaking gutter joints get worse over time. Water keeps hitting the same part of the wall and that can cause damp inside.
About our gutter sealing in Portswood
A drip at a gutter joint is easy to ignore, but the water lands on the same spot every time it rains. Resealing it is a small job while the gutter is still sound. We work on soffit joints, roofline trims and uPVC fascias, and common reasons people get in touch are end caps that drip every time it rains and damp patches inside below a leaking gutter.
Around Portswood, garages, outbuildings and extensions all add to the joints on the outside of a home. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Portswood (SO17, SO14, SO18)
- Wider area
- Southampton
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How it works
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from an hour or two to a few hours. For a job in Portswood, 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 trace the drip and check the gutter is not damaged.
- We remove the old sealant and clean the joint.
- We dry the joint so the new sealant can bond.
- A gutter sealant is applied to the joint.
- The gutter is checked and debris around the joints cleared.
Getting ready for the visit
- Keep children and pets away from the work area
- For business premises, tell us about site rules or sign-in
- Let us know if you’ve seen damp or leaks
How to get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, phone 0345 464 0079 or email us.
Advice
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Can I do it myself?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
FAQs for Portswood
I let a flat near St Denys station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
Does living near the coast affect gutter sealing in Portswood?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Portswood and the rest of Southampton, along with the rest of our area.
Can sealant stop a sagging gutter leaking?
No. A sagging gutter pulls its joints apart so it needs refixing before sealing.
Can you do several jobs on one visit?
Yes. More than one area can go on one quote.
When is the sealant fully cured?
It depends on the product and the conditions. Before we leave, we’ll tell you the cure time.
Do you have insurance?
Yes. We are fully insured.
Do you replace gutters or fascias?
No, we reseal joints, end caps and trims. A gutter installer or roofer deals with replacement.
Places near Portswood
What else we do in Portswood
Gutter sealing in Portswood: local notes
Portswood 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. That is hard on gutter, fascia and roofline joints, especially on the side facing the sea. 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.
If you look after a building such as St Denys Primary School, its movement joints, gutters and trims need looking after like any other building’s. Homes close to Highfield Church include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Portswood is about 1 mile north of Southampton, in Southampton. Portswood gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Portswood is one of 40 places in Southampton we cover.
All of SO17, SO14 and SO18 is covered for gutter sealing, from the main roads to the quietest streets. Whether your property is on Ivy Road, Alma Road and Lawn Road or a nearby road, we can help. With the A335 and A3035 close by, Portswood is simple for us to get to. We also cover St Denys (1 mile south-east), Southampton (1 mile south), Inner Avenue (1 mile south-west), Bitterne Manor (1 mile south-east) and Bitterne Park (1 mile east). Further out, we also cover Thornhill (3 miles south-east), Maybush (3 miles west), Eling (4 miles west), Rownhams (3 miles north-west), Millbrook (3 miles west) and Weston (3 miles south).
Near you in Portswood
Around Portswood, our work takes us to homes and buildings near St Anne's Catholic School, St Mary's Independent School and South Western Arms, among other places. There’s a railway station in Portswood itself: St Denys station. Other landmarks nearby include Marlands Shopping Centre (1.5 miles south) and Royal South Hants Hospital (0.9 miles south). Not far away are Netley Common.
How the job changes by surface
uPVC fascias
Open fascia joints look untidy and can let water in. A neat bead closes them up.
Roofline trims
We reseal trim joints with an exterior sealant suited to the material.
Leave it or put it right?
If the problem is a blocked downpipe, sealing won’t help. We look at what’s really happening and point you to the right trade if needed. Homes in smaller places like Portswood can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why book with us
- Arbo and Everbuild products
- We’re fully insured
- White, clear, grey or another colour, product permitting
- ARBOMaster approved applicator
See what affects the cost and what customers say.
Signs you need gutter sealing in Portswood
Debris in the gutter keeps water sitting at the joints. Standing water finds the weakest joint and drips through.
The most common problems we see are:
- Gaps along fascia and soffit joints
- Stop ends leaking at the end of a run
- Garage door frames letting rain in
- Wet patches on the wall under a gutter joint
If you let a flat or house near St Denys station, a dripping gutter joint or loose fascia trim is easy to miss until damp shows inside.
Comparing quotes
- Is the old sealant removed completely?
- Whether VAT is included
- What the cure time is
- How the surfaces are prepared before sealing