How to Glue Hardwood Floor

How to Glue Hardwood Floor

When to Use Glue-Down Installation

Glue-down is the preferred method when:

  • Installing over concrete (where nailing isn't possible)
  • Installing over radiant heat systems (floating floors can't be used; nailing may damage heating elements)
  • Installing engineered hardwood where maximum stability is required
  • Installing in high-humidity environments where a floating floor might move excessively

What You'll Need

Step 1: Prepare the Subfloor

The subfloor must be clean, flat, dry, and structurally sound. Use your moisture meter to confirm moisture levels are within acceptable range. Any contamination (dust, grease, old adhesive) will prevent proper bonding. For concrete, install moisture barrier first if moisture readings are elevated.

Step 2: Dry Lay the First Few Rows

Before applying any adhesive, dry lay the first 3-4 rows to confirm your layout, check fit, and identify any problem boards. Mark the subfloor with chalk lines as guides. Remove the boards and set aside in order.

Step 3: Apply Adhesive

  1. Apply construction adhesive to the subfloor in a manageable section - typically 2-3 rows at a time
  2. Spread evenly with a notched trowel at the angle specified by the adhesive manufacturer
  3. Work in sections you can cover before the adhesive's open time expires (typically 30-60 minutes)
  4. Apply adhesive only as far ahead as you can lay boards before it skins over

Step 4: Lay the Boards

  1. Place boards into the adhesive, pressing firmly down and sliding slightly to ensure full contact
  2. Use the tapping block to close joints between boards
  3. Maintain expansion gaps at all walls and fixed objects
  4. Wipe away any adhesive squeeze-out from the floor surface immediately with a damp cloth - dried adhesive is very difficult to remove

Step 5: Roll the Floor

After laying each section, roll the floor with a 100 lb floor roller to ensure full contact between the boards and adhesive. Roll in both directions. This step is critical - boards that aren't fully pressed into the adhesive will hollow-sound and may eventually delaminate.

Step 6: Allow to Cure

Keep foot traffic off the glued floor for at least 24 hours. Full cure typically takes 48-72 hours. Do not place heavy furniture on the floor until fully cured.

Products Used in This Guide

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