A sandwich panel roof is a type of roofing system that consists of a sandwich panel, which is a composite panel made up of two thin, rigid facings bonded to a thick, insulating core material. Sandwich panel roofs are used in a variety of industrial and commercial buildings for their excellent insulation properties, durability, and ease of installation.

The facings of a sandwich panel roof are typically made of metal, such as steel or aluminum, although other materials, such as fiberglass, can also be used. The core material is usually made of polyurethane foam, but other materials, such as polystyrene or mineral wool, may also be used.

Sandwich panel roofs are installed by attaching the panels to the roof structure using specialized fasteners, which are designed to hold the panels securely in place. The panels are typically installed in a single layer, although multiple layers can be used for added insulation.

The advantages of using sandwich panel roofs include their high insulation value, which helps to reduce energy costs and improve indoor comfort, their lightweight, which reduces the weight load on the roof structure, and their ease of installation, which helps to reduce installation time and costs.

Sandwich panel roofs are commonly used in a variety of industrial and commercial buildings, such as warehouses, factories, and distribution centers, as well as in residential buildings, where they are often used for flat or low-slope roofs.