Share on facebook
Tweet
Email
Share on Linkedin
Build Podcast | Episode 169: Mold Prevention & Indoor Air Quality (Part 2)
It’s an IAQ Deep Dive…part two! Matt welcomes Sean Harris back to the studio to continue their discussion indoor air quality improvements for existing homes, focusing on mold prevention, HVAC upgrades, filtration, and dehumidification—especially in hot, humid climates like Texas. Sean emphasizes that mold issues often stem from leaky ductwork in unconditioned spaces, poor ventilation, and high humidity, leading to compromised air quality. Instead of cleaning mold, he recommends removing contaminated materials and improving source control.
For HVAC systems, Sean suggests keeping ductwork in conditioned space, using MERV 13+ filters, and installing a ventilating dehumidifier to maintain humidity below 50%. He warns against running HVAC fans continuously, as this can pull humid air into the system, worsening mold issues. He also recommends in-room HEPA filtration (such as IQAir or Austin Air) over whole-home air purifiers.
They discuss (and advise against) gimmicky air purification methods like UV lights and ionizers, which can create harmful byproducts. Instead, homeowners should monitor IAQ with smart sensors, track humidity, and optimize their home’s ventilation and filtration. Sean emphasizes "optimization over maximization"—cost-effective solutions like air sealing, replacing moldy ductwork, and using high-quality air filters rather than full HVAC overhauls.
Both Matt & Sean encourage homeowners to prioritize practical, science-backed IAQ improvements for a healthier living environment.
Thank you to episode sponsor Mbrico. Learn more at mbricotiledecks.com.
Find Sean Harris on the Web:
- Website: https://iaqtexas.com/
- Instagram: @aerosealofaustin
- Facebook: https://www.facebook.com/IAQTexas/
Find Matt and The Build Show on the web:
- Build Show Videos: https://buildshownetwork.com/go/mattrisinger
- Instagram: @risingerbuild and @thebuildshow
- YouTube channel: https://www.youtube.com/@buildshow
- Website: https://risingerbuild.com/ and https://buildshownetwork.com/
Save the Date for Build Show LIVE 2025 in Dallas, TX: October 16-18, 2025!
Sponsors
Episodes
Spray Foam Insulation Pt 2 Myths Busted | Build Show Podcast Ep. 227
Episode 227
Matt Risinger continues his deep dive into spray foam insulation in Part 2, separating fact from fiction. He tackles common myths, explains where spray foam excels (and where it doesn't), discusses evolving European regulations, and shares smart hybrid insulation strategies for building high-performance homes.
Why Every Custom Builder Needs a Building Science Consultant | Build Show Podcast Ep. 222
Episode 222
Building science consultants focus on preventing building problems through early involvement, analyzing building enclosures, climate-specific design strategies, and risk management. Thank you to sponsor Huber Engineered Woods. Watch episodes on social media.
Why Building to Code Isn't Enough — The Build HD Standard Explained | Build Show Podcast Ep. 221
Episode 221
Jim Gunn discusses the Build HD standard with Matt Risinger, emphasizing water management, air control, structural performance, and durability. Building to code alone is not sufficient for lasting homes.