- Single sheet from wall to eaves
- Flashings and trims to suit
- Guidance on minimum pitch
- Choice of 16 colours
- Nationwide delivery within 7 days
Try Our Price Calculator
Follow our step by step calculator to get your steel roofing quote direct from Cardinal Steels
MONO-PITCH ROOFING
Steel Lean-To Roof Sheets for Mono-Pitch Roofs
Metal lean-to roof sheets have a mono-pitch roof that runs from a wall down to an eaves, and it brings two problems that an ordinary pitched roof does not. It is usually shallower than the builder would like, because head height at the wall is limited, and it meets an existing structure along its top edge.
Both problems come down to water. A shallow roof moves water slowly and gives it time to sit, and a junction with a wall gives it somewhere to get in. Our steel lean-to roof sheets are cut to length, and the pitch and abutment sections below cover the two details that matter most.
Pitch
Steel sheets rely on a fall to shed water, and at the horizontal laps a shallow pitch lets water creep back up between the sheets by capillary action. The shallower the roof, the more the laps have to do.
Where we can cut the sheets to run the whole slope in one piece, there are no horizontal laps at all, which removes the problem entirely. On a lean-to that is usually achievable.
The abutment
Where the roof meets the house or barn wall, a wall flashing carries water out of the junction and onto the sheets. Done properly it is tucked into a chase or under existing cladding rather than simply sealed to the face of the brickwork.
We supply flashings and trims made to suit the profile and the junction.
Choosing Metal Roof Sheets for a Lean-To
Box profile is the usual choice of metal roof sheet for a lean-to. Its stiffness along the length lets it span from the wall plate to the eaves with fewer intermediate purlins, and that matters on a structure that is often built off a light timber frame. Fewer purlins also means fewer to buy and fix.
Sheets are cut to length, so you order to the length of your slope. Measure along the slope from the wall to the eaves, not across the horizontal, because the sloping length is longer than the horizontal run. Allow for any overhang you want at the eaves.
If the lean-to encloses a workshop or store rather than an open log store, treat it like a closed building and consider anti-condensation sheets. Condensation forms in a closed building when warm, damp air meets the cold underside of the steel. If the lean-to is open-sided, standard sheets are normally fine.
Where the lean-to covers a window or a door, a GRP roof light in the run keeps the daylight the original opening was there to provide.
To price your lean-to roof sheets, use the price calculator at the top of the page or start an enquiry via the contact form here.
START YOUR ENQUIRY
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.
ROOFING SHEET APPLICATIONS
Multi-Purpose Roofing Sheets For All Applications
There is a large variety of use cases for our metal roofing sheets, and we have an extensive range of styles, sizes and colour combinations to suit each customer's individual needs.
Agriculture
Corrugated metal roofing sheeting is synonymous with farming and traditional barn roofs.
Stables & Field Shelters
Stable roofs are small, so the choice of profile is mostly about appearance and matching what is already on the yard.
Industrial
For unheated storage and distribution space, single skin steel is usually the simplest warehouse roofing.
Garages
A common reason to fit a metal garage roof is to replace corrugated cement sheet that has reached the end of its life.
Garden Sheds
Roof or clad your garden shed with corrugated steel sheets cut to size, in galvanised, polyester or plastisol finishes and 16 colours.
Garden Buildings
Garden buildings range from a basic tool store to a fully heated office, and the roof specification should follow how the building is used.
Carports
A carport is the one structure in this range where condensation is rarely the problem.
Lean-tos
Metal lean-to roof sheets have a mono-pitch roof that runs from a wall down to the eaves.
Caravans
Our caravan roof sheets are made from steel with a plastisol finish and are available in 16 colours.
Not sure which sheet suits your building?
Tell us what it is and how it is used and we’ll point you to the right profile and coating