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This residence had water damage in the adjoining bathroom and these “ghosting” lines appeared after repair work was performed. These lines are not from mold growth and a surface sample confirmed this, but it is typically caused by cold conductance from exterior walls through structural wall members such as wooden or galvanized steel studs to the drywall.

Once the inner exposed surface of the drywall becomes cold and below the dew point temperature condensation will occur if sufficient moisture is present which will attract airborne particles and adhere them to the surface after the moisture evaporates. Frequently the black “ghosting” lines are caused by excessive candle burning, but the material upon touch did not exhibit properties that supported that as a source. The building location is on a busy street and the black lines are suspected to be from automobile traffic on or immediately after a cold day with elevated moisture levels inside the rooms, but a forensic material analysis of the material would be necessary to confirm the true source of the debris. If you were wondering, ghosts do not cause these lines.

October 2017 Project.

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Service Area in Illinois

Arlington Heights
Buffalo Grove
Campton Hills
Cook County
​Crystal Lake
​Chicago​ (see panel below)

​Deer Park
​Downers Grove
DuPage County
​Elk Grove Village​
​Highland Park

​Kane County
​Lake Bluff
​Lake County
​Lake Forest
​Lake Zurich
​Long Grove​
McHenry County
​Oak Park

Orland Park
​Saint Charles
​Vernon Hills

Service Area in Chicago

​Gold Coast
​Grant Park
Lincoln Park
​Navy Pier
Near North Side
​Near South Side
​Mag Mile
​Old Town
​River North

…and many more in between.

Service Area in Wisconsin

Lake Geneva

…and many other towns along the IL border.

Service Area in Indiana

NW and dunes area

​…and other NW towns.