File #182, case name “Moldy Band Aids ”, has a young couple searching for a mold resistant paint in order to protect their joists and plywood from mold.
The couple had just added a 400 sq. ft. four season sunroom, including a full height basement, onto their existing 1200 sq. ft. home. While in the freshly poured basement, they noticed mold growing on the 2×10 floor joists and plywood below the newly finished area above. Their intentions were to scrub off the mold, then paint the floor joists and underside of the plywood, creating a less desirable surface for this household menace to grow on.
Although their strategy to paint the joists and plywood wasn’t totally flawed, with there certainly being mold resistant paints and primers available, it was definitely a young person’s solution. Encouraging somebody who’s 60-plus to reach up and paint floor joists, providing them with the opportunity to revive some of those old shoulder joint pains, would be like convincing them to bungee jump.
As they were further explaining the situation, my thoughts were more directed towards what was causing this mold issue in the first place. They requesting my recommendation of paints or primers, was kind of like seeking my advice as to what size of pail would best remedy a leaky faucet.
Bandage solutions are for the young, because they have the energy to watch them fail, then do them all over again. When you get older, your goal is to do things once. My suggestion was to focus on the real issue, which is what’s causing the mold, as opposed to choosing the proper roller and angled paint brush.
Mold requires the same three elements for survival as us humans, them being air, food, and water. Eliminate any one of the three, and you will have solved the mold problem. Air, we all require, while food particulates floating around in the home’s atmosphere are going to be practically impossible to control. So, that leaves water. Upon further questioning, it was discovered that the basement area had yet to be heated, and was simply accessible through a doorway, whereby the finished area above was being serviced by a gas stove. The original 1200 sq. ft. home is being heated by the only unit the house has ever known, a 16-year-old gas furnace.
Solution? This newly poured basement is exuding gallons of moisture, which is no doubt feeding this thriving colony of mold. As a result, this couple has got to get some air circulation and heat into the basement. When I inquired as to the existence of a heat or air exchanger, the fellow thought that there was indeed a unit attached to the furnace, although its age was uncertain. When I inquired as to their plans on replacing the furnace, since their existing unit was certainly near the end of its life cycle, and was going to be asked to further handle 30 per cent more living space, the fellow assured me the unit was in good working order, and that there were no plans for a change.
“What about installing an air/heat exchanger in the new basement area, wouldn’t that solve the moisture issue?” the fellow questioned. Perhaps, but again, we’re talking an $800 band aid solution. Basically, the budget for this rather extensive renovation should have included a complete reconfiguration of the heating systems and ductwork by a HVAC (Heating, Cooling, and Air conditioning) contractor or engineer. What this home needs is a high efficiency furnace and HRV (Heat Recovery Ventilation) unit, along with the necessary ductwork to circulate heat, and draw air out of the new basement and living space above.
If you’re not sure as to the efficiency of a mechanical unit, or whether it needs replacement, consider the age and reliability of your machine in dog years. That big number should help in your decision to upgrade the mechanical services in your home.