These curbs are made of galvanised steel and are mostly used in industrial projects. The square and rectangular metal curbs are provided with insulation, and are available in 2 models:
- The standard is provided with 40mm insulation
- The EP model is provided with 50mm polyurethane insulation
The round metal curbs are not insulated. The curb flange can cause a limited thermal rupture. The round polyester curbs may offer an alternative here.
From a height of 25cm and a daylight size of 80 x 80cm, the square and rectangular curbs can also be fitted with a ventilation grid in one or more sides. Each curb can be provided with a welded-in burglar-proof grid.