Air conditioning gets installed in the nick of time for proper moisture levels needed for hardwood and cork “The relative humidity is still reading 65 percent. Should we open or close the windows?” In preparing to install hardwood flooring, we have been monitoring moisture levels at this new construction site for weeks. It’s part of our normal preparation for installing hardwood and cork floors. “Don’t leave the windows open overnight or we’ll be sabotaged by night-time condensation,” our quality-control manager says. “The air conditioning is being installed tomorrow, and as long as that happens, we should be fine.” Tomorrow will be just 24 hours before all the flooring is delivered to acclimate in the home for three days prior to installation. The moisture content in the subfloors has been measured and was fine, but the relative humidity has been climbing since the walls were painted.