Removing old underlayment typically involves prying or scraping it up after removing any flooring layers on top, being mindful of the subfloor underneath.
Underlayment serves as a buffer and leveler between the subfloor and the finished flooring. Over time, it can deteriorate, become damaged, or need replacement for a new flooring installation. The removal process requires patience and the right tools to avoid unnecessary damage to the subfloor.
Essential Tools
Having the correct tools makes the job significantly easier and more efficient. Here's what you'll likely need:
- Safety Gear:
- Work gloves
- Safety glasses or goggles
- Dust mask or respirator (especially for older materials)
- Knee pads
- Pry Tools:
- Pry bar (various sizes)
- Floor scraper or large pull scraper
- Flat shovel
- Fastener Removal:
- Claw hammer
- Nail puller or cat's paw
- Pliers
- Cleanup:
- Utility knife
- Heavy-duty trash bags or a waste bin
- Shop vacuum
Step-by-Step Removal Process
Follow these steps to effectively remove old underlayment:
- Preparation:
- Clear the room of all furniture and obstructions.
- Remove the existing flooring laid over the underlayment (e.g., tile, vinyl, carpet). This may involve specialized tools depending on the flooring type.
- Wear all necessary safety gear before beginning work.
- Locate Fasteners:
- Underlayment is typically secured to the subfloor with numerous staples or nails.
- Identify where the sheets of underlayment join and look for concentrations of fasteners.
- Start Prying:
- Begin at an edge or corner of the underlayment sheet.
- Insert a pry bar, floor scraper, or flat shovel underneath the underlayment.
- Apply steady pressure to lift a section away from the subfloor. Work in small sections.
- Address Fasteners:
- As you lift the underlayment, you will encounter staples or nails.
- Use a hammer, nail puller, or pliers to remove fasteners from the lifted section or from the subfloor after the underlayment piece is removed.
- Removing most fasteners before fully pulling up a section can prevent the underlayment from tearing into small, difficult-to-handle pieces.
- Continue Section by Section:
- Work across the floor, lifting and removing underlayment sheets or pieces.
- Repeat the prying and fastener removal process until all the underlayment is lifted.
- Handle Stubborn Areas:
- Some areas, especially around edges or in corners, may be more difficult. Use a smaller pry bar or a sturdy scraper to get underneath these pieces.
- Subfloor Care:
- During removal, try to minimize damage to the subfloor. However, it's common for the scraper or pry tool to "skim" the subfloor slightly. As noted in the video reference, if it just skims it a bit (like a 16th of an inch), that's generally not considered a big deal. Focus on removing the underlayment and fasteners without gouging deep into the subfloor.
- Final Cleanup:
- Once all underlayment is removed, thoroughly remove any remaining fasteners embedded in the subfloor. A metal detector can help find hidden ones.
- Scrape away any residual adhesive or debris.
- Sweep or vacuum the subfloor to prepare it for the next steps.
Tips for Efficiency
- Work in a systematic pattern, such as removing full sheets or working across the room in rows.
- Take breaks to avoid fatigue.
- Proper ventilation is important, especially if dust is significant.
Removing old underlayment is a labor-intensive but necessary step for many flooring renovation projects. Proper preparation and execution will ensure a smooth base for your new floor.
