How To Repair An Internal Hollow Core Door?

This guide explains how to patch and repair a hole in a hollow core interior door using low pressure foam insulation and plastic wood putty. Hollow core doors are inexpensive, lightweight, and more common than solid wood doors. However, they can become damaged, such as scratches or cracks. The most common way to fix a door is to use a quick expansion filler to fill the space in a hollow core door, then sand it down and paint to match the existing color.

To fix the bottom or side of a hollow core door that is cut too short, clear out excess cardboard and glue within the opening. Cut a new door block out of MDF or wood and glue and clamp it. To repair a hole in a hollow-core door, follow these steps:

1. Prepare the area by sliding a tarp or drop cloth underneath the door to protect the floor.
2. Clean up the hole by cleaning up the hole, packing the hole, spraying insulation foam, trimming the foam, spreading filler, and sanding the filler.
3. Patch a hole in a hollow core door by applying spackle over the area you need to patch, then sanding it down. To hide the patch, paint or stain the area.

To repair a puncture in a hollow-core wooden door, use a patch kit designed for doors or follow these steps: clean the damaged area, apply spackle, and sand it down. Ron Hazleton has a very good video on how to patch a hollow door that is easy and inexpensive.