You don't need to be an ID or contractor to catch quality issues during your renovation; you simply need to know what to look for and when. Most significant defects are far cheaper to fix during renovation than after handover.
Stage 1: After Hacking, Before Plastering
This is your one chance to see inside your walls before everything closes up.
- Check wall surfaces: Look for water damage or mould staining on original HDB plaster; these must be addressed before new plaster goes on.
- Verify infrastructure: Ensure all electrical conduit and pipe positions match your approved layout. Fix any misplacements now, not after tiling.
- Inspect hacking: Ensure hacking is clean and square using a spirit level, as uneven walls require more plaster and can create uneven finished surfaces.
Stage 2: During Tiling
Visit during the tiling process, as this stage is where most visible long-term issues originate.
- The tap test: Tap tiles with a coin in a grid pattern; a hollow sound indicates a lack of bonding. Hollow floor tiles are particularly serious as foot traffic accelerates failure.
- Grout lines: Check for consistency in thickness and color. Wavy or uneven lines usually indicate rushing and will not improve after sealing.
- Lippage: Run your finger across joints; a height difference of more than 1–2mm between adjacent tiles is a workmanship issue.
- Waterproofing: Specifically ask for confirmation or photos of the waterproofing membrane application for bathroom floors and walls (up to 1.8m).
Stage 3: Carpentry Delivery and Installation
Carpentry is usually installed quickly, making this the time to verify material decisions.
- Measurements: Systematically check all dimensions against the agreed scope and specification documents.
- Mechanical test: Open and close every door and drawer; soft-close mechanisms should function correctly, and hinges should sit flush.
- Laminate edges: Inspect corners and edges for peeling, rough banding, or gaps where panels meet.
- Level check: Use a spirit level on every horizontal surface to prevent future door alignment problems.
Stage 4: Painting and Final Works
- Paint coverage: Use a torch to check walls from an angle (raking light) for roller marks, stippling, or uneven coverage.
- Trims and gaps: Inspect skirting and cornices for gaps. These should be fixed with sealant to prevent dust accumulation.
The Bottom Line
A good quality check is systematic rather than confrontational. Most quality contractors welcome shared accountability, while those who resist inspections may have something to hide.
