Very high levels of AST (more than 10 times normal) are usually due to acute hepatitis, sometimes due to a viral infection. With acute hepatitis, AST levels usually stay high for about 1-2 months but can take as long as 3-6 months to return to normal.
MFMA recommends the relative humidity level for a concrete slab for a non-glue-down maple floor system be 85% or lower and for glue down systems the concrete slab relative humidity level should be 75% or lower before installation.
If you are installing laminate flooring over a concrete subfloor, a moisture barrier is required. Step 4 Place the flooring materials in the installation room for at least 72 hours prior to installing them so they can acclimate to the temperature and humidity ranges recommended by the manufacturer.