Should we use mold-resistant drywall throughout the basement?

Yes, using mold-resistant drywall throughout your basement is absolutely worth the investment and considered best practice for Ottawa's climate conditions. The moderate additional cost provides significant long-term protection against moisture issues that are common in below-grade spaces.

Mold-resistant drywall (also called moisture-resistant or green board) contains additives that inhibit mold growth and better resist moisture absorption compared to standard drywall. In Ottawa basements, where humidity levels naturally run higher due to our clay soil conditions and seasonal temperature swings, this extra protection becomes particularly valuable. The paper facing is treated with antimicrobial agents, and the gypsum core is formulated to be less hospitable to mold growth.

The cost difference is typically $0.50 to $1.00 per square foot more than standard drywall - so for a 600 square foot basement, you're looking at an additional $300-600 in material costs. When you consider that mold remediation can cost $15,000-30,000+ and the health implications for your family, this upfront investment makes financial sense. Most Ottawa contractors, including ourselves, recommend it as standard practice for basement renovations.

Ottawa's specific climate factors make mold-resistant drywall even more important here. Our clay soil retains moisture, foundation walls can experience condensation during spring thaw, and temperature fluctuations between seasons create conditions where moisture problems develop. The Ontario Building Code doesn't specifically require mold-resistant drywall in basements, but it's become an industry best practice that most insurance companies appreciate seeing.

Professional installation is crucial regardless of drywall type. Proper vapor barriers, adequate ventilation, and correct moisture management are equally important. Even mold-resistant drywall won't solve underlying moisture problems - it's one layer of protection in a comprehensive moisture management strategy. If you're finishing a basement that has had water issues, address those first with proper waterproofing and drainage.

For your Ottawa basement project, combine mold-resistant drywall with proper insulation, vapor barriers, and ensure adequate ventilation meets current OBC requirements. This creates a comprehensive moisture management system that protects your investment and your family's health for years to come.

Want to discuss the complete moisture management strategy for your specific basement? We offer free consultations to assess your space and recommend the best approach for Ottawa's unique conditions.