The most widespread type of masonry work is the erection of solid brick masonry using individual bricks set in mortar. âLight masonry,â consisting of two parallel face walls each one-half a brick thick and filled with a light concrete, loose slag, or another insulating material, is sometimes used.
A sinkhole, also known as a cenote, sink, sink-hole, shakehole, swallet, swallow hole, or doline (the different terms for sinkholes are often used interchangeably), is a depression or hole in the ground caused by some form of collapse of the surface layer.
The tiny black bugs that emerge from your bathtub and sink drains are commonly known as drain flies, although some call them drain moths, filter flies and sewer flies. Although drain flies generally do not transmit disease, you will want to remove them from your home permanently in case they do.