24/09/2026
Ensure your new laminate or SPC flooring stands the test of time with this simple checklist. ✅
📋 Subfloor Preparation Checklist
Moisture Testing (Crucial for Concrete Subfloors)
Visual Inspection: Look for dark patches, white powdery residue (efflorescence), or damp odors.
Prong Test (Wood): Utilize a digital moisture meter on wooden subfloors, which should read under 12% MC (Moisture Content).
Hygrometer Test (Concrete): Employ a relative humidity (RH) floor teste
r, ensuring the reading is below 75% RH before laying flooring.
Moisture Barrier: If readings are excessive, apply a liquid damp-proof membrane (DPM) or utilize a v***r-barrier underlayment.
Screeding (For Concrete Subfloors)
Clean the Base: Thoroughly vacuum all dust, plaster, and loose debris.
Check Levelness: Use a long straightedge or spirit level across the room; any dips or peaks greater than 2mm over a 2-meter span require correction.
Apply Primer: Roll a suitable acrylic primer over the concrete to prevent the screed from drying too quickly.
Pour Self-Leveling Compound: Mix and pour the screed into low areas, using a spiked roller to eliminate air bubbles.
Wait to Dry: Allow the screed to cure completely; a general guideline is 24 hours per 1mm of thickness, but always consult the manufacturer's instructions.
Plyboarding (For Wooden Subfloors)
Fix Loose Floorboards: Secure any squeaky or loose boards with screws before covering them.
Choose the Right Thickness: Opt for a minimum of 6mm flooring-grade plywood (SP101 grade is recommended).
Stagger the Joints: Lay the plywood sheets in a brick-bond pattern to prevent corners from meeting at the same point.
Leave Expansion Gaps: Maintain a 1mm to 2mm gap between the plywood sheets to accommodate seasonal movement.
Secure the Boards: Fasten screws or ring-shank nails every 100mm to 150mm across the entire surface, ensuring all heads are flush or slightly countersunk.
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