Hey there! I've got a severe sensitivity to mold and I'm aiming to build a home that's resistant to it—not perfectly mold-proof but definitely more durable against it. So far, I've figured out a few key things I want to incorporate: I'll be building on a slab with in-floor heating for better temperature control, and I'm considering a panelized build to avoid outdoor elements. I'm also planning to treat the lumber with a suprastratum coating that helps prevent mold and mildew for about ten years, especially for any exposed wood. Additionally, I'm looking at a Panasonic ERV for air exchange and a whole-home dehumidifier. I'm even evaluating the HVAC system and have thought about just going with window units for AC. I haven't really nailed down my choices for insulation and drywall yet, so I'm all ears for creative ideas!
2 Answers
I always say, build like they do in Florida—use block walls and mold-resistant drywall. Keeping your home dry is essential since mold thrives in humid conditions. I highly suggest installing a whole-house dehumidifier with a good filter to keep the humidity below 70%. When it comes to air pressure, if you're in a warmer, humid area, try to keep a positive pressure inside the home so dry air escapes outwards. But in colder climates, you may need to manage the pressure to prevent warm, humid air from causing condensation and mold in your walls.
Some builders recommend using metal 2x4s instead of wood for framing, as they are less prone to mold issues. Also, there are companies that offer mold-resistant treatments that can be sprayed on framing during construction. A quick Google search should help you find someone in your area to do it!