 SCP-836 is the designation given to a condition occurring within clay, bricks, or concrete, though secondary propagation can affect most known structural materials. The initiating factors are currently subject to research, though the likelihood of SCP-836 appearance increases rapidly for structures over years old. Full stage of SCP-836 manifests as a deformation within the material that grows at an average rate of grams per day. The mass increase seems to correspond to a density drop in surrounding material. The deformation is hygroscopic. Furthermore, data expunged, which seems to initially fuel the growth. The dissection of SCP-836 instances shows the inside alternating between solid layers and a foam-like interstitial structure.