Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to insulate a drop ceiling [title] Ensure that your ceiling tiles can support the weight of the insulation. [step] Although batt insulation is fairly lightweight, it can put an undue amount of stress on flimsy drop ceiling tiles and break them. [substeps] If you have fiberglass tiles, you'll need to replace them before proceeding.

Ending1: You'll need to measure how long each tile will go. For example, a drop ceiling tile will weigh between 20-30 pounds (4.7-6.8 kilograms). Ending2: To update the tiles, look for an epoxy sheet covering at your local hardware store. [title] Straighten your tiles so that they're lying evenly on each side. Ending3: Some fiberglass tiles will come with built-in decals that make peeling them easier. Other fiberglass tiles will need to be replaced using adhesive putty and a caulk gun. Ending4: Fiberglass ceiling tiles cannot support the weight of insulation. If you have the more common wood-and-gypsum ceiling tiles, they will need to be at least 5/8 inch (15 mm) thick to be used safely with batt insulation.

Answer format: ending1/ending2/ending3/ending4