Galvanised trapezoidal profile T18 WT, 615 mm sheet width, grade 2

A carport, a wood store and a workshop roof all benefit from a material whose shape does useful work. The ribs in trapezoidal sheet increase stiffness while keeping the covering light. One simple material can therefore serve several different buildings. The regular pattern gives a practical, engineered appearance, while the coating helps coordinate the finish with a home, a business or farm buildings.

Forming the cross-section into trapezoidal ribs gives a thin sheet greater stiffness than a flat one of similar thickness. Select the rib depth and material properties to suit the function and structure. One profile may be right for a garage wall and another for the roof of a large hall. Compared with many heavier coverings, low weight is useful in refurbishment when assessing what an existing roof frame can carry. You can consider a finished roof without adding unnecessary weight to the covering itself.

Large sheets create clear, continuous surfaces. They suit the simple shape of an outbuilding or a well-ordered commercial façade. Colour and coating affect both appearance and resistance to exposure. A light carport roof, a dark garage wall and a subdued service building can all belong to one design for a property. Water drainage is also important: a properly detailed roof drains in the intended direction, with flashings to match the profile.

Different rib depths allow the scale of the pattern to suit the size of the building.

Sheets cut to suitable lengths can reduce the number of end laps on a roof.

Coordinated colours on roofs and façades can tie several buildings on one site together.

Steel cladding material can be recycled after use.

Trapezoidal sheets are used on the roofs and façades of garages, shelters, halls and agricultural buildings. They can enclose a storage area or cover a space where equipment can be serviced out of the rain. Their simple lines also suit contemporary designs that use repetition as an architectural feature. The user gets an enclosure suited to the space, and the contractor has a range of profiles to choose from. Using the right version on each surface gives it the stiffness and appearance required without imposing one section on the whole building.

SteelProfil supplies first- and second-grade trapezoidal sheets, including sheets from stock. We offer promotions and competitive prices and can compare profiles, coatings and sizes for a roof or façade, taking account of the building’s size, its surroundings and how it will be used.