UNLIKE MOST BUILDING WALLS, our sanctuary’s long walls are made of two different materials: concrete (along the bottom), and a wood frame that is covered with gypsum lath and plaster. This has been a problem for the portion of the south wall that is exposed to the (sometimes blazing) sun, as compounded by re-radiation from the adjacent asphalt parking lot. In reaction to the daily heating-and-cooling cycles, the two parts of our wall respond differently: they expand and contract at different rates. Little wonder, then, that over the past 25 years, a horizontal crack developed along the seam between the two parts of the wall, running about 70' long.
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1/10/23: Horizontal crack at the seam of the concrete wall and the frame wall also showing moisture damage from water intrusion (As usual, click/tap on an image to enlarge it.) |
As you probably know, the wall is in the process of reconstruction, as part of the interior painting project. Below the jump, this post explains the steps that we have taken to prevent that crack from reappearing.