- Mansard Roof
- A double-pitched roof with the lower section acting as walls, contains dormers.
- Mantle
- Shelf above a fireplace.
- Masonry
- Any wall or pier made using any combination of concrete, brick or stone and mortar.
- Metal Lath
- Expanded metal or wire mesh used as a base for plaster or stucco.
- Mil
- One thousand of an inch.
- Millwork
- Refers to trim work used on the insider outside of windows and doors, decorative work on porches, panel were, stairways, mantles, etc.
- Modular Home
- A home constructed in a factory and delivered to the site in sections. Assembled on foundation walls already constructed on-site.
- Mortar
- Mixture of Portland cement, lime and sand, mixed with water. Used as the ‘glue’ between bricks or blocks.
- Mortar Bed
- A layer of mortar onto which a block, brick, tile or other member may be laid.
- Mullion
- The vertical member between any two window units.
- Nesting
- Method of re-roofing with new asphalt shingles over old shingles in which the top edge of the new shingle is butted against the bottom edge of the existing shingle tab.