Hidden contamination
Can blood soak through flooring into the subfloor?
Yes. Depending on the amount, time and flooring system, blood and other fluids can move through carpet and pad, between plank seams, around transitions and into underlayment or subflooring.
Why does this matter?
A floor can look clean on top while contamination remains below. Surface wiping cannot address material that has migrated into inaccessible porous layers.
Does every floor need removal?
No. The correct scope depends on the material, location and extent of contamination. A professional should avoid unnecessary demolition while still addressing material that cannot be effectively remediated in place.