Hampshire · England
Knowle Gutter Sealing
Sealing leaking gutter joints, end caps, fascias, soffits and roofline trims for homes and businesses in Knowle and across Hampshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Water running down the wall below the gutter
- Garage door frames letting rain in
- Damp on an inside wall under a dripping gutter
About our gutter sealing in Knowle
Water dripping from a gutter joint can stain walls and soak the ground below. Often a reseal is enough if the gutter is not damaged. We are often asked to deal with drips from gutter joints and end caps and earlier gutter repairs that have peeled off, across uPVC fascias, gutter end caps and soffit joints.
Somewhere as small as Knowle, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
You get a one-year guarantee, the same in Knowle as everywhere else we work.
- Place
- Knowle (PO17)
- Region
- Hampshire
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
uPVC fascias
Our work is the joints, not new fascias. If boards are damaged, we’ll tell you.
Gutter joints
A dripping joint doesn’t always mean a failed gutter. Resealing is usually enough.
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Landlord and commercial work in Knowle
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Keep an eye out for wet patches below a joint
- Rest ladders on the wall, not the gutter
- Keep downpipes clear
- Have sagging gutters refixed early
Leave the new sealant to cure as we advise and avoid disturbing it.
Once roofline sealant splits, water can get behind it. Sealing it early keeps the boards behind dry and the wall below.
Why deal with it now?
You don’t need new fascias just because the joints have opened. A neat seal closes the gaps as long as the boards are in good condition. Where a wall is exposed, as many are in small places like Knowle, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
No two jobs are quite the same, 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 will explain the quote if you ask.
Why us?
- A sealant colour to suit the surroundings
- Experience in homes, commercial sites and hotels
- Sanitary silicone with an anti-fungal additive in wet areas
- Rated 4.9 stars on Google
Knowle: your questions answered
Is Knowle within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is Knowle in your area for gutter sealing?
Yes, Knowle is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
How long does the job take?
As a guide, most jobs take a few hours, depending on the number of joints and the access. Bigger jobs take longer, and we’ll say how long yours will take.
Do you work on high-level gutters?
Low gutters are simple to reach. For higher work, tell us about access and we will confirm what’s needed.
Can new sealant go over the old?
No, it won’t last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Are you fully insured?
Yes, we’re fully insured.
Common problems we fix in Knowle
When a gutter sags, its joints open. Resealing a sagging joint will not last so the brackets need attention first.
Common reasons people contact us include:
- Quick sealant fixes on gutters that didn’t last
- Trim joints where the sealant has failed
- Wet patches on the wall under a gutter joint
- Leaking gutter joints and stop ends
Managing a site like Orchard Lea Infant School? Then larger buildings have long runs of movement joint that eventually need resealing.
Questions to ask before booking
- Are they insured?
- How hidden problems are handled
- How the surfaces are prepared before sealing
- How long to leave it before use
Outside joints around Knowle
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Fareham station? Then a dripping gutter joint or loose fascia trim is easy to miss until damp shows inside. If you live in an older home near Church of St Francis, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Knowle is about 2 miles north of Fareham, in Hampshire. Knowle gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Knowle is one of 683 places in Hampshire we cover for gutter sealing. Our Portsmouth page covers work nearby, about 7 miles away.
Postcode districts we cover here for gutter sealing: PO17. That includes homes and businesses on Serotine Close, Boundary Walk and Park Approach and the roads around them. Close by, we work in Funtley (1 mile south), Tapnage (1 mile north-west), Heathfield (2 miles south), Segensworth (2 miles west) and Titchfield Park (2 miles south-west). Within a short drive, we also cover Winchester (13 miles north), Gosport (6 miles south-east), Havant (10 miles east), Eastleigh (9 miles north-west), Horndean (9 miles east) and Totton (13 miles west).
Around Knowle
We work in homes and buildings around The Miners Arms and The Henry Cort Community College. For rail, the closest station is Fareham station, roughly 2 miles south of the centre. Nearby you will also find Portchester Castle (4.9 miles south-east) and Knowle Hospital (less than half a mile north-east). Green spaces nearby include Portsdown Hill and Swanwick Lakes.
What we do, step by step
The work is kept neat and contained to the area we are working on, so you can get on with your day. Expect the work to take an hour or two for a few joints, longer for a full run, and we tell you how long to leave it before we go. Somewhere as small as Knowle, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the gutters, fascias and trims and agree the joints to seal.
- We clean out each joint.
- The joints are dried.
- The sealant is applied and finished.
- We check our work before we leave.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- For business premises, tell us about site rules or sign-in
- Move anything stored near the joints
Getting a quote
Need a quote? Please ring 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear price before any work starts.