3 Costly New Build Mistakes to Avoid | Ep. 43

Looking to find healthy home building professionals in your neighborhood? Use the Holistic Homes Directory: 🏡🌱 https://holistichomesdirectory.com/ Take your next step in building a healthy home with me: 👉🏼 https://form.typeform.com/to/cRQhjt5i Follow me on Instagram: ✨ https://www.instagram.com/holistichomes.bychristine The most expensive construction mistakes are often the ones hidden behind walls, buried in material choices, or overlooked when a home's mechanical systems are designed. By the time the warning signs appear, homeowners may be facing major remediation, replacement work, or a renovation that has to be opened back up. In this episode, I'm sharing the three costly mistakes I see on new builds and extensive renovations—and the planning and quality-control steps that can help you avoid them. The first is failing to properly design and test the home's enclosure: the foundation, exterior walls, windows, roof, and attic. I share the story of a 10-year-old Los Angeles home where mold led to a much larger discovery. Leaking windows, stucco, and building paper ultimately left the interior gutted and the exterior in need of extensive work after several unsuccessful repair attempts. Enclosure commissioning, window and roof leak testing, and air-leakage testing can uncover problems while they are still easier to correct. The second mistake is waiting until the end of construction to think about material off-gassing. Insulation, cabinetry, flooring, paint, furniture, and other finishes can all affect the home's post-construction off-gassing period. I explain why it is important to review safety data sheets, set realistic project requirements early, and select materials intentionally instead of trying to solve the problem after installation. I also discuss insulation choices, formaldehyde and VOC considerations, and why spray foam deserves careful evaluation during planning. The third mistake is treating the mechanical system like an à la carte list of equipment. ERVs, dehumidifiers, exhaust fans, ductwork, heating, and cooling all need to be calculated around how the home is actually designed to perform. I walk through a coastal renovation where an insufficient system, no dehumidification, no fresh-air strategy, and no airflow in a subterranean closet contributed to mold covering the homeowners' clothes while they were away. These failures are expensive to correct after drywall, finishes, and furnishings are in place. The best time to prevent them is during planning, when the enclosure, materials, and mechanical systems can still be coordinated as one healthy-home strategy. In today's episode, we're talking about: - Why the enclosure is one of the most important parts of a healthy home - How leak testing and enclosure commissioning reveal hidden moisture risks - What to consider when selecting insulation and other off-gassing materials - Why mechanical systems must be calculated for the home's actual performance - How fresh air, dehumidification, and airflow affect moisture management - Why early planning is the most effective way to prevent costly failures