Handling Avoid dragging doors across one another and keep doors clean. Store flat on a level surface in a dry, well-ventilated building. Doors should be conditioned to average prevailing relative humidity. Doors should not be subject to extreme or rapid changes in heat or humidity. Avoid sudden changes such as forced heat to dry out a building. Doors should not be delivered to the job site or installed until concrete floors, foundation, plaster, or drywall are cured. In addition to finishing both door surfaces, all ends and edges must be sealed with an effective coating before installation, to prevent undue moisture absorption. Additional coats of the finish materials will increase resistance to moisture absorption. Fitting and Hanging Allow approximately 3/16" clearance on width. Caution must be used to avoid impairing the strength of the door when trimming. Trim no more than 3/16" from each side. Use three hinges on all 1-3/4" solid core doors. Hinges must be set in a straight line to prevent distortion. Jambs and stops must be set square and plumb. Immediately after cutting and fitting (before hanging) seal all cut surfaces and ends of doors with an effective coating. WARNING: interior molded wood fiber doors are manufactured with a formaldehyde-based resin, and may emit small quantities of formaldehyde into the air. Formaldehyde has been classified as a possible carcinogen and may also cause eye or respiratory conditions.