Corinne | My Chemical-Free House

Corinne | My Chemical-Free House

Mold Preventative Flooring

For a slab, kitchen, bath, upper floor, over unconditioned spaces

Corinne Segura's avatar
Corinne Segura
Mar 16, 2025
∙ Paid

This is a big one! This is a cornerstone article/manifesto on preventing mold in and under flooring.

I have never written this all out before.

Some of these are common best practices, some are recommendations that come from Cheryl Ciecko and other building science experts, and some would be considered an extra cautious approach for the super sensitive (some are my opinion).

I also spoke with Andy Pace and Paula Baker-Laporte for their input.

I’m covering:

  • What is the best flooring for over a slab on grade or basement slab?

  • What is the most mold preventative flooring in a kitchen or bathroom?

  • What is the recommendation for mold preventative flooring when your kitchen or bathroom is over an unconditioned space?

  • What is the best mold-safe flooring for an upper level floor?

  • What underlayments can trap moisture and cause problems (even on upper level floors)?

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