Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to install torch down roofing [title] Remove any old roofing, debris, or other objects from the surface that is to be roofed. [substeps] Removing old roofing is not always necessary; check with local building codes. Often, torch down roofing can be installed directly on top of old roofing.

Ending1: Remove any apparent cracks, cracks, or damages. These may indicate the building's foundation has fallen inward or been turned over from the wind, and repairs might be needed. Ending2: [title] Secure metal flashing to the edges of the roof area. [title] Apply primer to the metal flashing to allow the torch down roofing to adhere to it more easily. Ending3: These roofing sites typically are shaded by trees and other structures. [title] Study the damage caused by the torch down roofing. Ending4: Inspect any existing roofing or debris and remove any bumps, slopes, or underlevels of the roofing. [title] Visit a roofing school and have your students bring their own kits.

Answer format: ending1/ending2/ending3/ending4