Portsmouth · England
Portsea Gutter Sealing
Gutter sealing for Portsea, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked sealant along roofline trims
- Garage door frames letting rain in
- Leaking gutter joints and stop ends
About our gutter sealing in Portsea
Our work covers gutter joints and end caps as well as fascias and soffits plus roofline trims and garage door frames. It’s all about the joints, not replacing the gutter. If you are dealing with water running down the wall below the gutter and damp patches inside below a leaking gutter, we can put it right, whatever the surface.
In and around Portsea, older properties sit alongside newer ones, each with its own outside joints. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
Every job comes with a 12-month guarantee, wherever you are in Portsmouth.
- Place
- Portsea (PO1, PO12, PO5)
- Region
- Portsmouth
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How the visit works
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the work takes anything from an hour or two to a few hours for a typical job. For a job in Portsea, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, we find the drip and check the gutter isn’t cracked or sagging.
- Old sealant and dirt are removed from the joint.
- The area is dried so the sealant can bond.
- An exterior or gutter sealant is applied to the joint.
- We check the run and clear any debris we find while we’re there.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Move anything stored near the joints
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Asking for a quote is easy: let us know the job and the location and its rough size. A few photos by email make the job easier to understand, and we will come back to you with a quote.
Advice
Surface by surface
Garage door frames
Resealing a garage door frame keeps rain and draughts out.
Gutter joints
A dripping joint does not always mean a failed gutter. Sealing the joint often stops it.
Why act early in Portsea
If the problem is a blocked downpipe, sealing will not help. We look at what’s really happening and tell you if something else is needed. In a smaller place like Portsea, 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.
What it costs depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start.
Why Portsea clients choose us
- Every job guaranteed for a year
- We agree the colour with you first
- Quality sealants from Arbo and Everbuild
- Colour picked to suit the job
Towns and villages near Portsea
Also in Portsea
Outside joints around Portsea
Portsea is close to 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.
Letting a property close to Portsmouth Harbour station? Then a dripping gutter joint or loose fascia trim is easy to miss until damp shows inside. In the older streets around St Ann's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Portsea is about 1 mile south-west of Portsmouth, in Portsmouth. We carry out gutter sealing for homeowners, landlords and businesses in Portsea and the surrounding area. Across Portsmouth, we cover 19 places, and Portsea is one of them.
Postcode districts we cover here for gutter sealing: PO1, PO12 and PO5. Whether your property is on Main Road, Park Road and Scott Road or a nearby road, our applicators can take on the job. Nearby, we also carry out gutter sealing in Portsmouth Point (1 mile south), Clayhall (2 miles south-west), Haslar (2 miles south-west), Alverstoke (2 miles south-west) and Privett (2 miles west). Within a short drive, we also cover Hilsea (3 miles north-east), Wymering (4 miles north-east), Paulsgrove (4 miles north), Cosham (3 miles north-east), Drayton (4 miles north-east) and Farlington (5 miles north-east).
Local landmarks in Portsea
Around Portsea, our work takes us to homes and buildings near The Ship & Castle pub, St Jude's CofE Primary School and Charter Academy and the streets around them. There’s a railway station in Portsea itself: Portsmouth Harbour station. A little further out are Royal Portsmouth Hospital (0.8 miles east) and Genesis Expo Creationist Museum (under half a mile south). Green spaces nearby include Milton Locks and Portsdown Hill.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Get leaks sealed before the wet months
- Check the gutters during heavy rain
- Glance at the soffit joints now and then
- Watch the wall under the gutters for staining
While checking gutters, glance at the fascia joints too. Splits are easier to seal early.
If an end cap is dripping, deal with it before winter. Water down the wall all winter can cause damp inside.
What affects the quote in Portsea
We do not publish a price list. What we look at:
- The old material and how stubborn it is
- Which sealant suits the joint
- The number and length of the joints
- Working hours on commercial sites
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, and we’ll explain the quote if you ask.
Helping us quote
When you contact us, these details help:
- Where the property is
- Photos by email, if that is easy
- Any access issues, like height or stairs
- If someone has resealed it before
If you’re in Portsea and need gutter sealing, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
What we are called out for in Portsea
Stop ends take pressure from water running along the gutter. Once the seal behind them fails, they drip and runs down the wall.
It’s worth asking for a quote if you see:
- Streaks down the brickwork from a leaking joint
- Rain getting in around a garage door
- Stop ends leaking at the end of a run
- Damp on an inside wall under a dripping gutter
Managing a site like Portsmouth Grammar School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- What insurance they hold
- What guarantee comes with the work
- When the joint can take water or movement
- Whether all the old sealant comes out first
Common questions in Portsea
Do you work for landlords with property near Portsmouth Harbour station?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Is Portsea within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
How long does the job take?
It depends on the size of the job, but as a guide it takes anything from an hour or two to a few hours. We’ll give you a better idea when we quote.
Will you clear out my gutters?
We clear debris around the joints we are sealing. A full clean of the gutters is not part of it.
Can I choose the sealant colour?
We’ll suggest a colour to suit the surroundings. The product needed can limit the range.
Do you install new fascias or gutters?
No. We seal leaking joints, end caps and trims. A gutter installer or roofer deals with replacement.
Can a leaking gutter joint be sealed?
In most cases, yes. A sagging or cracked gutter needs more than sealant and we’ll say so.
Where is Mr Mastic based?
We are based in Crawley, and we cover South East England, London and all of Scotland.
DIY sealant or a professional job?
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. Everything old must be removed first.
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.