Truth window

{{short description|Opening in a wall surface to reveal the wall components, often found in strawbale houses}}

Image:Truth_window_02_Pengo.jpg.]]

Image:Truth_window_01_Pengo.jpg

A truth window (or truth wallGreen Development: Integrating Ecology and Real Estate. 1998. Alex Wilson. p500.) is an opening in a wall surface, created to reveal the layers or components within the wall.Good Green Homes. 2003. Jennifer Roberts. p156.Solar Today. 1994. American Solar Energy Society. p21. In a strawbale house, a truth window is often used to show the walls are actually made from straw bales. A small section of a wall is left unplastered on the interior, and a frame is used to create a window which shows only straw, which makes up the inside of the wall.The Good House Book. 2004. Clarke Snell. p174.

Many designs exist for truth windows. Glass may be placed over the window, or an openable wooden panel, or it may be a simple framed opening.

The possible vulnerability of a truth window to moisture intrusion is sometimes raised as a concern.[http://www.ohiolink.edu/etd/view.cgi?acc_num=ohiou1125775864 Straw-bale as a viable, cost effective, and sustainable material for use in southeast Ohio]. 2005. Leanne R. Marks.{{by whom|date=January 2025}}