Gutter Replacement Hampshire
Gutter Replacement Services in Hampshire
A uPVC gutter run typically requires replacement after 20 to 30 years, as joints begin to fail, brackets detach from softened fascia, and water starts to spill behind the wall line. Left unaddressed, this progression causes damp to penetrate render and plasterwork before the gutter itself shows obvious external signs of deterioration.
C J Roofing & Renewables Ltd specialises in replacing old and worn gutters across Hampshire. We remove the existing system, inspect the fascia thoroughly, and install a new run tailored to your property. Every gutter replacement is backed by our 10-year workmanship guarantee.

What are the signs you need a gutter replacement?
Four or more failing joints on one elevation indicate the need for gutter replacement. Brackets detaching from decayed fascia and rust penetrating cast iron stop ends are significant indicators that the system has reached the end of its serviceable life. Patch repairs often fail once the gutter has reached this stage.
Common signs include:
Sagging mid-runs where brackets have slipped and visible joint separation
Sagging mid-runs where brackets have slipped indicate that the gutter has lost its proper fall and is pooling water rather than directing it to the outlet. Visible joint separation confirms the seals have failed and the system is no longer watertight.
Four or more failing joints on one elevation indicate the need for gutter replacement. Patch repairs often fail once the gutter has reached this stage, and a complete strip-out proves more efficient than multiple separate repairs.
Rust streaks down the render and damp patches on upstairs walls
Rust streaks down the render indicate rust penetrating cast iron stop ends — a significant sign that the gutter has exceeded its lifespan. Pre-1960 cast iron gutters may require replacement after 70 to 90 years.
Damp patches on upstairs walls near the eaves show that water is backing up behind the gutter and penetrating the property. Common cast iron issues include cracked sockets at lead seals, shifted brackets, and sediment accumulation inside the channels.
Rotten fascia timber under the channel and green algae trails below downpipes
Rotten fascia timber under the channel means brackets are detaching from decayed wood, causing the gutter to slip and fail. Extensive fascia rot behind the gutter channel warrants replacement, as repeated repairs indicate the end of the gutter’s serviceable life.
Green algae trails below every downpipe indicate consistent overflow or leaking at downpipe connections. A property with multiple failing uPVC joints across one elevation usually requires a complete strip-out to prevent ongoing repair cycles.
UV-related profile brittleness on south-facing white uPVC gutters
South-facing white uPVC gutters may develop cracks after 20 to 30 years due to UV-related profile brittleness. A uPVC gutter run often requires replacement after this period as a result of wear from sun exposure and temperature cycling.
The criteria we assess include UV-related profile brittleness alongside joint failures, fascia condition, bracket stability, and internal sediment accumulation. Each material has a specific lifespan, and we record the results during the survey.
Signs of ageing: failing joints, brackets detaching, water spilling behind walls
Signs of ageing include failing joints, brackets detaching from soft fascia, and water spilling behind the wall line. Water infiltration behind the fascia can result in stained render and bubbled plaster inside your home within months.
Pre-1960 cast iron gutters may require replacement after 70 to 90 years, with common issues such as cracked sockets at lead seals, shifted brackets, and sediment accumulation inside the channels.
A complete strip-out often proves more efficient than attempting multiple separate repairs.
What materials suit a Hampshire gutter replacement?
Three primary materials are well suited to most Hampshire properties: uPVC, aluminium, and cast iron. Each material suits a specific type of property:
- uPVC is appropriate for post-war properties, with a lifespan of 20 to 30 years.
- Aluminium is suitable for seamless runs up to 40 metres.
- Cast iron is the correct choice for Georgian and Regency listed buildings.
We typically install uPVC on post-war properties due to its ease of installation and availability in standard colours. Cast iron is matched to Georgian and Regency facades. Coastal Hampshire conditions may require marine-grade aluminium or powder-coated finishes to resist salt-air corrosion. Research from the University of Southampton indicates that marine-grade finishes can extend the lifespan of aluminium gutters by up to 15 years in coastal environments.

What does our gutter replacement process involve?
Our gutter replacement process consists of eight distinct stages on every project, ranging from the initial strip-out through to a final flow test.
Steps we perform on site:
Protect: deploy dust sheets across borders, patios, and parked cars
We deploy dust sheets across borders, patios, and parked cars before any work begins. This protects your property throughout the strip-out and installation process.
Dust sheets are laid over all areas requiring protection as the very first step, so your drive and garden remain clean for the duration of the job.
Access: use ladders or scaffold towers against the eaves
We use ladders or scaffold towers positioned against the eaves for safe access to the gutter line. Larger Edwardian-style properties with parapets may require additional time due to the number of elevations involved.
Tower scaffolds are used on the front elevation and stand-off scaffolds over rear conservatories where needed. The access method is determined by eaves height and ground conditions before work begins.
Strip: remove each old section and sort for disposal
Each old gutter section is removed and sorted for disposal. We dispose of old guttering and downpipes through a licensed waste contractor, with no unexpected charges at completion.
uPVC is sent to a plastics recycler, while cast iron is taken to a registered scrap yard. Disposal costs are included in the original quote.
Probe and timber: inspect fascia for rot and replace deteriorated boards
We inspect the fascia for rot along its entire length, probing at regular intervals. Hidden fascia rot can be found behind what appears to be a sound cast iron gutter.
Deteriorated boards are replaced with primed redwood or uPVC capping before the new brackets are attached. Addressing fascia deterioration at its source prevents ongoing repair requirements and ensures a solid fixing for the new system.
Brackets, run, flow test: install brackets, secure profile, test with 10 litres
Brackets are installed at 600 to 800mm intervals with a 1 in 600 fall toward the outlet. The new profile is secured, stop ends are sealed, and downpipes are installed with swan-neck offsets to clear bays.
We pour 10 litres at the highest point to confirm clear flow to the gully in the final flow test. Our gutter replacements include a 10-year workmanship guarantee covering all sealed joints, set brackets, and aligned downpipes.
How do we decide between repair and replacement?
We assess the extent of damage and the age of your gutters, comparing the cost of repair against the cost of full replacement. We recommend replacement when the total cost of repairs exceeds 50% of the cost of a new system. Extensive fascia rot behind the gutter channel also warrants replacement, as repeated repairs often indicate that the gutter has reached the end of its lifespan.
The criteria we examine when assessing damage and age include:
- Number of joint failures per elevation
- Fascia condition
- UV-related profile brittleness
- Bracket stability along the run
- Internal scale and sediment accumulation
South-facing white uPVC gutters may develop cracks after 20 to 30 years, while cast iron may suffer from pitting after 60 to 80 years. Each material has a specific lifespan, and we assess the existing gutter during the survey, recording the results in the quote.
A property with multiple failing uPVC joints across one elevation usually requires a complete strip-out to prevent ongoing repair cycles.

How does a gutter replacement protect your home long-term?
A new gutter installation re-establishes proper water flow and reinforces bracket stability. Addressing fascia deterioration at its source removes the underlying cause of ongoing repair requirements.
Effective gutters ensure water follows the intended path — along the channel and into the outlet, before the downpipe directs it to the drain. Blocked or sagging gutters cause water to backtrack under roof tiles, leading to moisture retention in battens, softening of lime mortar, and compounding damage during adverse weather.
New gutter installations also protect wall finishes. Malfunctioning gutters can cause water to pool at the base of walls, staining render and potentially rotting window sills. By addressing these risks at their source, we prevent future render, masonry, and timber repairs.
We pair new gutters with fresh stop ends and sealed unions, fitting swan-neck offsets to clear bays and positioning shoe outlets over each gully.
Why Choose C J Roofing & Renewables Ltd for Gutter Replacement in Hampshire?
Over 15 years of experience
Connor and Jack bring over 15 years of combined hands-on roofing experience, delivering everything from small domestic repairs to large-scale commercial projects across Hampshire.

Locally based in Hampshire
Based in Portsmouth with deep local roots, we understand Hampshire’s homes, weather, and building styles - allowing us to deliver roofing work that’s built to last.

5-star rated service
We’re proud to be rated 5 stars on Google by our customers, reflecting the quality of our workmanship and our commitment to reliable, professional service.

Competent & highly trained team
Our team is fully trained and certified in asbestos awareness, working at height, and manual handling - ensuring every project is carried out safely and to industry standards.

£5 million public liability insurance
We carry up to £5 million in public liability insurance, giving you complete peace of mind that your property is fully protected while we work.

10 year workmanship guarantee
All new roof installations and replacements come with a 10-year workmanship guarantee, so you’re covered in the unlikely event of any issues.


Frequently asked questions
Take a look at the Frequently Asked Questions regarding our Gutter Replacement service.
How long does a gutter replacement take?
A typical three-bedroom semi-detached property requires one day with a two-person team. Larger properties may take two or more days, with job duration scaling accordingly.
What does your replacement warranty cover?
Our gutter replacements include a 10-year workmanship guarantee. Manufacturer warranties may extend beyond this, depending on the system installed. The workmanship guarantee covers all sealed joints, set brackets, and aligned downpipes. Product warranties cover issues such as splitting, fading, and seam failure, passed through from the manufacturer.
What about asbestos-cement or heritage materials?
Licensed asbestos removal is outside our scope. We halt work and refer to a licensed contractor if asbestos cement downpipes are encountered. Heritage replacements require like-for-like materials, and Listed Building Consent is required for Grade II properties.
What happens if you find extra damage during the replacement?
Our team stops, photographs the issue, and presents the findings for your approval before any further work proceeds. Common hidden issues include rotten sarking boards, woodworm in fascia, or concealed hoppers behind ivy. These often reveal themselves once the strip-out begins, and hidden fascia rot can be found behind what appears to be a sound cast iron gutter. We provide a free survey to identify most hidden work upfront.
Do you handle disposal of the old run?
Yes. We dispose of old guttering and downpipes through a licensed waste contractor. uPVC is sent to a plastics recycler, while cast iron is taken to a registered scrap yard. Disposal costs are included in the original quote, with no unexpected charges.






