Abstract
This controlled laboratory study tested 12 common building materials for mould resistance under simulated Singapore climate conditions (30°C, 85% RH). Cement-based boards showed 92% better mould resistance than standard paper-faced drywall. Antimicrobial paint systems extended colonization time by 340% compared to standard paints.
Materials Tested
- Standard paper-faced drywall (gypsum board)
- Moisture-resistant drywall (green board)
- Mould-resistant drywall (purple board)
- Cement board (fibre cement)
- Magnesium oxide board
- Standard latex paint
- Antimicrobial latex paint
- Epoxy paint system
- Untreated wood (pine)
- Treated wood (preservative-treated pine)
- Ceramic tile with standard grout
- Ceramic tile with antimicrobial grout
Key Results
| Material | Days to Colonization | Resistance Rating |
|---|---|---|
| Standard drywall | 7 | Poor |
| Moisture-resistant drywall | 14 | Fair |
| Mould-resistant drywall | 42 | Good |
| Cement board | 90+ | Excellent |
| Standard latex paint | 12 | Poor |
| Antimicrobial paint | 45 | Good |
| Epoxy paint | 60+ | Very Good |
Recommendations
- Wet areas (bathrooms, kitchens): Cement board with antimicrobial paint or epoxy
- High-humidity rooms: Mould-resistant drywall with antimicrobial paint
- Standard rooms: Moisture-resistant drywall with quality latex paint
- Renovation tip: Replace standard drywall with cement board in problem areas