The first thing to establish is the thickness of your roof deck. Click on the options at the bottom of each page and continue to choose the features you require. If you have recently purchased the building your supplier can confirm the specifications of your installation, or you can just measure the dimension from outstide.
Don't worry if your building is Clad or Insulated as in every case 50mm bolts will suffice. (see insulation or cladding page)
Roof thickness Up to 16mm
The only difference is the Bolt length Supplied these will come with 40mm Bolts which will mean the bolt covers will fit and cover the thread and nuts below the window.
Choose Next to select this thickness.
Unit 16, Hanger 3
Rudford Industrial Estate