Building owners love them for their affordability ... It features an entirely flat roof that is not visible from the ground.

Complies with DIN 18234 without additional measures (prevention of fire expansion on the flat roof), resistance to external fire exposure from flying sparks and radiant heat with classification ...

Before sketching out your design, assess the roof you're planning to use - it's important that the building is sturdy enough to hold the structure you build. If you have a sloping roof it's best ...