Plastic vs Metal Gutters
Plastic and metal gutters differ in cost, lifespan, weight and appearance. uPVC suits most modern homes. Aluminium lasts longer and holds its shape better. Cast iron suits period properties and carries a traditional look. This guide compares them plainly, without declaring a single winner.
Plastic gutters: uPVC
uPVC is the common domestic gutter material. It is light, economical, easy to fit and needs no painting. It suits most modern homes and most budgets, and it is the default choice where no other factor points elsewhere.
uPVC has limits. It expands and contracts with temperature, which works joint seals loose over time. It can become brittle with great age, and it does not suit the traditional look of a period property.
Metal gutters: aluminium
Aluminium is light, strong and long lasting. It resists corrosion, holds its shape well and needs little maintenance. It costs more than uPVC, and that cost buys lifespan and durability.
Aluminium suits properties where gutters are expected to last decades, and where a step up from uPVC is wanted without the weight of cast iron. It is fitted in profiles similar to uPVC, so the look is familiar.
Metal gutters: cast iron
Cast iron is the traditional material for period properties. It is heavy, durable and carries a distinct traditional appearance that suits older houses. It needs painting to prevent rust, and its weight demands sound fascia fixings.
Cast iron is the most expensive option, in material and in fitting time. Its weight makes handling slower, and failed fixings under cast iron cause more damage than under lighter materials.
Comparison table
The table below summarises the trade-offs. The right choice follows the property, the budget and the expected lifespan.
| uPVC | Lowest cost |
| Aluminium | Mid cost |
| Cast iron | Highest cost |
Which material suits your property?
A modern home with a normal budget points to uPVC. A home where gutters should last decades points to aluminium. A period property, or a home in a conservation setting, points to cast iron for appearance and authenticity.
Profile and capacity matter as much as material. A larger roof needs a gutter that can carry its runoff, whatever the material. Size and downpipe count are confirmed with the material choice.
Frequently asked questions
Which gutter material lasts longest?
Cast iron lasts longest with painting, followed by aluminium. uPVC lasts decades with care, but less long than either metal.
Is aluminium better than uPVC?
It lasts longer and holds shape better, at higher cost. For most modern homes, uPVC is sufficient. Aluminium suits homes where long life matters most.
Do period homes need cast iron gutters?
Not always, but cast iron suits period properties for appearance and authenticity, and it is often the expected material in traditional settings.
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Last updated: 2026-10-27