A small room or entranceway where muddy overshoes and wt garments can be removed before entering other rooms.
Mudsill
Horizontal piece of pressure-treated board, which is placed and fastened on top of a foundation, upon which the rest of the framing is erected. It is also called a sill plate.
Mulch
Any loose material placed over the soil to control weeds and conserve soil moisture. Usually this is a coarse organic matter. Common mulches are grass clippings, leaves, saw dust, or straw.
Mullion
A vertical post or other upright that divides a window or other opening into two or more panes. Sometimes only ornamental.
Mullion windows
Two side-by-side windows, separated by a very small distance.
Multi-centered arch
This arch, also called a flat arch, straight arch, minor arch, segmented arch, or jack arch, has a horizontal top surface, with a span of up to 6 feet, can support loads up to 1,000 pounds per square foot, with a rise to span ratio of 0.15 or less.
Multi-dwelling property
Residential property containing individual units for several households within the same structure.
Multi-face fireplace
Fireplace that has two or more sides to open to more than one room.
Multi-layer
More than one layer.
Multi-meter
Electric meter that serves more than one function.