Persistent dampness is exactly the condition mold and mildew need to establish themselves — and a garage or basement floor with poor sealing or trapped moisture underneath a coating can become a hidden source of growth in Oregon's climate.
Mold and mildew need moisture and organic material to grow. Oregon's persistent rain and humidity mean concrete floors — especially in poorly ventilated garages and basements — stay damp for longer stretches than they would in a dry climate, creating more opportunity for growth if moisture gets trapped somewhere it shouldn't be.
If a coating is applied over a slab with elevated moisture that wasn't properly tested and addressed, or if the coating has gaps, poor adhesion, or damage, moisture can become trapped between the slab and the coating — an environment mold and mildew can exploit without being visible from the surface right away.
Proper moisture testing before coating, a moisture-tolerant material like polyurea, and — where testing indicates it's needed — a moisture-vapor barrier primer are what actually prevent this cycle, rather than a coating applied without addressing what's happening beneath the surface.
Noticing any of these signs on an existing coated floor? Oregon Polyurea can assess what's actually happening and recommend the right fix — reach out for a free estimate.
No obligation. We'll assess your space and give you a real number.