• 16 colours to suit the garden
  • Insulated panel options
  • Anti-condensation for year-round use
  • Cut to your exact sizes
  • Nationwide delivery within 7 days

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Follow our step by step calculator to get your steel roofing quote direct from Cardinal Steels

Roofing a Garden Room, Office or Workshop

Garden buildings sit somewhere between a shed and a house, and the specification should follow how the building is actually used. A tool store can be roofed like a shed. A garden office that is occupied through a winter working week is closer to a small building and deserves to be treated as one.

Two things separate it from an ordinary outbuilding: it is visible from the house and the garden, so appearance carries real weight, and it is heated and occupied, which changes everything about how the roof behaves.

Appearance

Our sheets are available in 16 colours across plastisol, polyester paint and galvanised finishes. Darker greys and greens tend to recede against planting; a bright colour will be the first thing you see from the kitchen window for the next twenty years.

Box profile reads as contemporary and suits a modern garden room. Corrugated is softer and sits more comfortably with an older house.

Heated and occupied

Once a building is heated, a single steel skin loses that heat quickly and condenses on the inside. Insulated panels carry a rigid core bonded between two steel skins and go on in a single fix.

Where full insulation is not warranted, anti-condensation sheets at least deal with the drips.

Composite insulated panel
PVC plastisol finish

Rain noise

The question we are asked most often about garden offices is whether a steel roof will be noisy in the rain. On a bare single skin over an uninsulated room, yes, noticeably. On an insulated panel the difference is substantial, because the bonded core damps the drumming rather than leaving a thin steel sheet free to resonate.

Our guide on whether metal roofs are noisy when raining goes into what actually causes it and what reduces it.

All of our sheets are made to order at our Bromsgrove facility and cut to your exact lengths, so there is no cutting on site. Choose from plastisol, polyester paint or plain galvanised finishes in 16 colours, with nationwide delivery within 7 days and a 48-hour express option on request, subject to availability.

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What Coatings Do We Offer?

We always recommend our PVC Plastisol-coated sheets due to their cost-effectiveness and excellent resistance to abrasion and corrosion. Polyester-coated sheets are also a high-quality, versatile option suitable for both box profile and corrugated roofing sheets. However, care must be taken to avoid scratching during handling and installation.

Tell us how the building will be used and we will suggest a build-up.