Replacing the bottom/floor of a kitchen cabinet that has been damaged due to a leak can be done by following these steps:
Empty the cabinet: Remove all items stored in the affected cabinet and clean out any debris or water that may have accumulated.
Remove the cabinet doors and drawers: Take off the cabinet doors and, if applicable, the drawers to make it easier to access the cabinet floor.
Inspect the extent of the damage: Assess the damage to determine if it's localized to the cabinet floor or if it has affected the surrounding areas. If there is extensive damage, you may need to consult a professional for further assistance.
Remove the damaged cabinet floor: Use a utility knife or a saw to cut away the damaged portion of the cabinet floor. Be careful not to damage the cabinet frame or surrounding areas.
Take measurements: Measure the dimensions of the removed section to ensure you cut the replacement piece accurately.
Acquire replacement material: Purchase a suitable replacement material, such as plywood or melamine, with the same thickness as the original cabinet floor. It's recommended to choose a material that is resistant to moisture and water damage.
Cut the replacement material: Using the measurements taken in step 5, cut the replacement material to fit the exact size and shape of the removed section.
Install the replacement: Place the replacement piece into the cabinet, ensuring it fits snugly. Use screws or nails to secure the replacement material to the cabinet frame. If needed, you can use construction adhesive for added stability.
Reattach the cabinet doors and drawers: Once the replacement material is securely in place, reattach the cabinet doors and drawers.
Clean and restore: Clean the cabinet thoroughly and address any underlying issues that caused the leak to prevent future damage. You may need to fix plumbing or sealant issues, if applicable.
If you're unsure about any step or lack the necessary tools or skills, it's recommended to consult a professional carpenter or a handyman who can assist you with the replacement process.