“One of the key elements for our success is never to be satisfied with current standards, but to always strive to improve our services,” says Knight when referring to the unique level of excellence of the DoubleJack team. “Besides our professionalism, an extensive knowledge and commitment to quality applications, health and safety as well as a committed understanding of client needs are required to ensure ongoing success.”

Supply & Deliver

Expert industry
Materials (Site Specific)

  • Roof Sheeting
  • Side and Gable Sheeting
  • Conveyor Sheeting
  • Silo Sheeting
  • Bullnose’s, Curved Sheets,
    Center Cracked Sheets
  • Insulation
  • Flashing’s
  • Ventilators
  • Louvres
  • Rainwater Goods
  • QC Decking

Safety files (Risk assessments, etc.)
QCP Documents (data packs, etc.)


New warehouses, offices, conveyors, etc
Strip & replace works
Maintenance works
According to manufacturers specifications
Members of the MEIBC
Compensation Fund – Letter of Good Standing
Members of SEIFSA
Have expert knowledge, due to experience in the market place


Lead times

We strive to supply the best lead times possible.


We work at heights that not many people would dare, with a fantastic LTI (lost time injuries) record to show that we are more than capable.


We have employees in our employ that have been with us for more than 15 years. Their dedication and skill set has led us to where we are today.


DoubleJack Construction has been trading since 1970 and the company’s comprehensive knowledge, combined with its highly trained professional team, has lead to it being known as one of the highest-ranking professionals within the roofing industry. DoubleJack Construction fulfils all sheeting requirements, delivered together with professional drawings, accurate schedules and trained and committed staff.