Mansard
A decorative addition, steep slope usually with shingles or metal on the perimeter of a building. A mansard roof is this portion of a roof, which terminates into a flat roof at it's highest point. |
Mastic
An adhesive material (cementing agent) used to facilitate holding waterprofing membrane in place on a roof surface. |
Mat
Thin layer of woven, knitted, or non woven fiber used as a reinforcement in roofing materials. (shingles, membranes) |
MSDS (Material Safety Data Sheets
A written description of chemicals and other pertinent data in a roofing material. Including safe handling and emergency procedures. It is the responsibility of the manufacturer to produce an MSDS to comply with OSHA regulations.
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Mechanically Fastened
Referring to membrane (single ply) installations, describing the process of attaching the membrane at strategic points to the substrate (screws and plates etc) |
Membrane
A flexible / pliable roofing material which excludes water (waterproofing sheet) |
Metal Roof Panel
an interlocking metal sheet, with an installed exposure of approx. 3 square feet. |
Metal Roof Shingle
Interlocking metal component, with an installed exposure of less than 3 feet. |
Mil
A unit of measurement. One mil is equal to .001 inches, 25.4 micrometers. Used to indicate the thickness of a roofing material, typically membrane. |
Mildew
Growth produced on organic matter or living plants by fungi. |
Millimeter
A unit of measurement, equalling .03937 inches. |
Mineral Surfaced Roofing
Roofing material with a surface (top) of granules (embedded). Mineral surfaced sheet, commonly referred to as "rolled roofing", a class B material typically used on out buildings. |
Model Codes
Commonly referred to as "building codes", are standards or codes established to provide uniformity in regulations in regards to construction. These codes are set forth by local govt entities. |
Modified Bitumen
A roofing material used on low slope roofs. a bitumen modified by adding one or more polymers (atactic polypropylene, butadiene styrene etc.). Sheet forms are typically reinforced with various types of mats or films, also surfaced with films (smooth modified) or mineral granules (granulated modified) |
Moisture Relief Vent
AKA Anti condensation vent, a device installed through roofing membrane to vent moisture vapor pressure from within the system. |
Moisture Scan
A process utilizing a device (infrared, capacitance etc) to detect the presence of moisture within a roofing system. |
Monolithic / Monoform
A roofing system formed from or comprised of a single material, hence seamless. |
Monomer
Low molecular weight substance, consisting of molecules capable of reacting with like or unlike molecules to form a polymer. |
Mopping
Application of a hot bitumen with a mop applicator to the substrate or plies of membrane. |
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