Preventing Basement Moisture and Mold

basement moldMany homeowners make a substantial investment in basement finishing only to have their new finished basements damaged or destroyed by water damage or mold.  Luckily, this misfortune is largely preventable with good planning and proper construction.  These tips on preventing basement moisture and mold will help you to enjoy your finished basement for years to come without worrying about potential water or mold damage.

Drainage

Your basement is unique from any other room in the sense that it’s underground.  Think of it as a concrete box surrounded by wet soil on all sides, and you’ll get the picture.  When rainwater from even a small storm isn’t diverted properly away from the house, water can easily accumulate.  Ensure that your gutters are clean and in good repair, and that downspouts are diverting water away from your foundation.

One issue with basement finishing Toronto homeowners face is a substantial amount of annual snowfall and subsequent runoff water that saturates the soil.  If groundwater is problematic, a French drain could be a good option.  Talk to your basement finishing contractor about whether this could be a problem in your area, and to discuss potential solutions.

Insulation

Basement insulation has a tendency to accumulate condensation and develop mold growth, so proper insulation is critical to preventing basement mold damage.

Rigid foam board is made of polystyrene, polyisocyanurate (polyiso) and polyurethane.  It is not only highly efficient, but also keeps water vapor in its gaseous state, preventing moisture accumulation.  A vapor barrier may also be helpful.

Minimizing the Potential for Water Damage

Even proper construction cannot prevent the occasional accidental basement flooding.  For this reason, it’s still important to minimize the damage of a potential flood by selecting appropriate flooring.  Stained concrete, tile, laminate flooring and engineered wood are also potential options for finished basement flooring, as they don’t absorb moisture can withstand a certain amount of water damage.

If you’re currently finishing your basement or have had basement moisture issues in the past, we’d love to hear your own ideas and experiences.  Tell us all about it in the comments section.