What Are the Steps to Handle Water Damage in a Historic Building?

Your first step is to stop the active water flow if it is safe to do so. Shut off the main water valve or address the specific leak, such as from a broken pipe or a failed roof seal. Turn off electricity to the affected area only if you can access the breaker panel safely and without walking through standing water. Remove portable valuables, rugs, and furniture to a dry space to prevent further staining and water absorption into these items.

You need to call local water damage pros who understand historic buildings. Look for those familiar with old plaster, lathe, solid wood, and antique finishes. They can assess hidden damage in walls and subfloors without causing unnecessary harm. Their specialized approach aims to save original materials whenever possible.

• Assess the type of water involved, which could be clean water from a supply line, gray water from an appliance, or contaminated black water.
• Identify the specific porous and non-porous historic materials affected.
• Check for hidden moisture in wall cavities, floor joists, and subfloors.
• Evaluate structural integrity of load-bearing elements like beams and posts.
• Plan for controlled drying that won't warp or crack historic wood.
• Coordinate with any relevant historic preservation guidelines or authorities.

After drying is complete, the careful cleaning and repair of salvageable historic elements begins. This may involve specialized, pH-neutral cleaners for water marks on wood paneling or plaster ceilings. Some materials, like damaged lath or a section of flooring, may need careful replication using period-appropriate techniques and materials. Finally, a preservation-minded professional can advise on specific treatments, such as appropriate vapor barriers or drainage improvements, to protect the building from future moisture issues common in your local climate.