Step 6: Drill Pilot Holes
On the sides of the chase cover, also known as the skirt, drill a pilot hole on each corner. For a larger cover, you will want to have a few more for added stability. For best results, put your drill on a low speed when trying to drill through stainless steel. Once the pilot hole are tapped, use stainless steel screws to screw the chimney chase cover to the chase.