These doors are strong and safe!
They are made of pre-painted, galvanised steel, available in different colours or in plain galvanised (economy model).
Their high-quality double-locking system, which can be operated from both inside and out, offer maximum security.
A highly efficient, even-balance spring-system ensures smooth finger-tip control.
Roller doors are usually constructed of corrugated steel although other materials can also be used where strong impact resistance is not required eg: transparent corrugated fibreglass.
Corrugations give the door strength against impacts. a typical single car garage roller door will have a preloaded spring inside the rolling mechanism. this reduces the effort required to open the door.
Larger roller doors eg: – commercial premises, are not spring loaded, they use manual pulley and chain systems or a geared motor to raise and lower the door.
The advantage of these doors are the ease of automation
