Have you thought about plastic coated box profile sheets, as for fixing into steels, Screwfix do roof bolts that will self tap and screw in metal.
We have used these to drill straight into rsj, where drill bits have failed.
But being a rubber roof installer, I would go with rubber roofs sugestion, it looks good.
We have used these to drill straight into rsj, where drill bits have failed.
But being a rubber roof installer, I would go with rubber roofs sugestion, it looks good.
