Term Definition
MLA 0 likes
Metal Lath Steel Framing Division of National Association of Architectural Metal Manufacturers
Mnemonic 1 like
Disposed towards or inclined to support memory
Indicators and guides on mass produced components designed to assist in constructing or installing in the correct configurations
Mobility 1 like
The extent to which a substance or object moves
Mobilization 0 likes
The process of facilitating or enabling movement
The construction and transportation of equipment to a place of work
Modacrylics 0 likes
Modified acrylics; see Acrylics
Modal Analysis 0 likes
Establishing earthquake design forces founded upon the theory-based reaction of a structure to various stimuli with various vibrations corresponding to the excitement
Mode 0 likes
A particular design, look or aesthetic
A pattern or particular approach when undertaking something
The most commonly occurring value in a collection of data
The angle or slant of the vibration curve
Model 0 likes
The prototype from which a mold or reproduction is made
Modem1 like
An apparatus that links a computer to the telephone system
Modification 0 likes
An amenable alteration to the terms of a contract
Modified Bitumen 0 likes
Bituminous membranes adjusted and altered with styrene butadiene or atactic polypropylene to enhance and increase elasticity, cohesion, flexibility, toughness and durability
Modified Mercalli 0 likes
Adjustments and distinct alterations to the original Mercalli Scale to exhibit construction supplies and processes in the United States compared to the European construction processes and supplies of the first Mercalli Scale
Modular 0 likes
Existing as or comprised of modules
Modular Dimensional Standards 0 likes
Standards approved by the American Standards Association for the dimensions of building resources and equipment, predicated on a module, the standard unit of measurement of four inches, which is employed as a foundation for the grid; this is vital for dimensional coordination of at least two different materials
Modular Masonry Unit 1 like
A unit where the nominal dimensions are predicated on the four inch module
Modular Ratio 0 likes
Signified by the symbol “n”, the proportion of modulus of steel elasticity (Es) compared to that of concrete (Ec)
Modulating 0 likes
An apparatus or control mechanism that adjusts incrementally and virtually imperceptibly as distinct from other types of systems which operate in either a fully engaged or fully disengaged manner
Modulating Refrigeration System 0 likes
Refrigerating system that has a range of dimensions and functional capability
Module 0 likes
A uniform component or distinct unit employed in construction
Modulus of Deformation 0 likes
A notion of modulus of elasticity conveyed as a function of two time variables; loaded concrete strain as a function of the load age when first administered and the period of time the load is held and maintained
Modulus of Elasticity 0 likes
The proportion of stress to the correlating strain in a material; the ratio of the generally expected level of stress to the correlative strain for malleable stresses under the material’s proportional limit; represented by the symbol E, and also referred to as Young’s modulus and Young’s modulus of elasticity
Modulus of Rigidity 0 likes
Signified by the symbol G; the ratio of shearing stress to the correlating shearing strain; also known as shear modulus, and modulus of elasticity in shear
Modulus of Rupture 0 likes
A quantifiable indicator of the load-carrying ability of a beam that measures the possible degree of malleability in the extreme fiber of a transverse test specimen under the load, thereby producing fissures and schisms; occasionally known as rupture modulus, or rupture strength
Modulus of Subgrade Reaction 0 likes
Ratio of load per unit area of horizontal surface soil mass to the corresponding surface
Mogul Base 0 likes
An incandescent lamp with an energy capacity of 300 watts or more that has a screw-in style foundation
Moist Air Curing 0 likes
A process whereby moist air is generated at atmospheric pressure and a temperature of about 70° F
Moist Cure 0 likes
See Cure
Moist Room 0 likes
An interior area in which the atmosphere is sustained at a chosen temperature and humidity of 98 percent at a minimum, in order to preserve and store cementitious test samples; the facilities are required to have the capacity and conditions to maintain free moisture continuously on the outside of the test samples
Moisture 0 likes
Water that is separated into miniscule particles; often referred to as vapor
Moisture Barrier 0 likes
A membrane designed to stop liquid water from passing through a wall or a floor
Moisture Content 0 likes
Volume of water that is retained in a substance; in wood, it is generally expressed as a percentage of the oven dry wood weight
Moisture Content of Wood 0 likes
Volume of water held within the wood, generally classified or measured as a percentage of the oven dry wood weight
Moisture Expansion 1 like
Expanded dimensions of a ceramic article due to a reaction with water or water vapor; the reaction may transpire in time at atmospheric temperature and pressure, but is hastened by exposure of the article to water or water vapor at increased temperatures and pressures
Moisture Indicator1 like
moisture indicator
A device that is used to calculate a refrigerant’s moisture content
Moisture Meter2 likes
moisture meter
A device that determines a material’s electrical resistance and compares it to the quantity of ambient moisture content; frequently used by painters to discern the viability of surfaces such as masonry or plaster for the addition of paint
Moisture Movement 0 likes
The consequences of moisture passing through a permeable substance on volume change and efflorescence in mortar, hard cement paste, rock, or concrete
Moisture Protection 0 likes
Undertaking designed to inhibit or prevent moisture seepage
Moisture Vapor Transmission (MVT) 0 likes
Rate of moisture vapor passage through a membrane
Moisture, Absorbed 0 likes
See Absorbed MoistureMoisture, Absorbed is when moisture is absorbed into a solid material
Mold 0 likes
Container with a cavity in which intact and tidy cement, mortar, or concrete test samples are cast; a form applied to create precast mortar or concrete units; also seen as mould
Mold Oil 0 likes
A mineral oil is added to the inside surface of a fresh, unused mold prior to casting concrete or mortar, to enable removal of the mold when the contents have become hard
Mold, Casting 0 likes
See Casting Mold
Mold, Running 0 likes
See Running Mold
Molded Plywood 0 likes
Plywood custom built to a requested shape that is not perfectly flat; this shaping is frequently undertaken when the layers are glued by introducing fluid pressure or curved forms
Molding2 likes
Wood strip, metal or plastic trim used to obscure or cover up joints or add a decorative element to a surface; also spelled moulding
Molding Plaster2 likes
molding plaster
A rapid-setting gypsum plaster used for the production of cast ornaments
Molding, Base 0 likes
See Base Molding
Molding, Bed1 like
molding, bed
See Bed Molding
Molding, Lip 1 like
See Lip Molding
Molding, Picture 0 likes
See Picture Molding
Molding, Rake 0 likes
See Rake Molding
Mole Run 0 likes
A ridge in a roof film or layer that is not connected with deck joints or insulation
Molecule 0 likes
Nominal core unit of a chemical compound that can be involved in a chemical reaction; a group of atoms that are interconnected
Molliers Diagram 0 likes
A chart or visual representation of refrigerant pressure, heat, and temperature features and characteristics
Molybdenum 0 likes
A metallic element similar to chromium that reinforces and hardens steel
Moment 0 likes
An indicator of the inclination to create rotation; the result of multiplying the magnitude of a force by its distance at right angles from a specific point or axis; see Bending Moment
Moment Connection 0 likes
As distinct to a pin connection which allows rotation, a linking of two structures that is unyielding to rotation between the members
Moment Diagram 0 likes
A visual and statistical means of representing the value of the bending moment at any specific point along a beam
Moment Distribution 0 likes
A technique of structural investigation carried out on continuous beams and rigid frames where ensuing converging corrections are applied to an assumed set of moments until the desirable precision is reached; alternatively referred to as the Hardy Cross method
Moment of Inertia 0 likes
Sum of the products gained as a result of multiplying each unit of area by the square of its distance from an axis
Moment Resisting Frame 0 likes
A structural frame consisting of rigid joints whereby the joints and members counter horizontal and vertical forces
Moment, Negative 1 like
See Negative Moment
Moment, Positive 0 likes
See Positive Moment
Momentum 0 likes
The measurable amount of motion of a moving body, determined by multiplying its mass and velocity; the advancement and progress resulting from movement
Monastery 1 like
The residence of a religious community
Monel Metal 0 likes
A combination of nickel, copper, aluminum, and iron that resists corrosive liquids
Monitor 0 likes
A structure that extends above the general roof level, creating vertical windows for light and ventilation
Monitor Cabinet 0 likes
A cabinet where the doors have slats that allow for natural elements such as ventilation, or finish
Monkey Wrench1 like
monkey wrench
A flexible, adaptable wrench
Mono Pitch Truss 0 likes
A truss which can create or transform a roof for a shed
Monochlorodifluoromethane 0 likes
Well regarded and commonly purchased low temperature refrigerant.  Monochlorodifluoromethane is Freon 12 or R-22, with a boiling point of 41° F at atmospheric pressure; cylinder code is green in color
Monochromatic 0 likes
A single color or hue
Monochromatic Harmony 0 likes
Color harmony created by utilizing shades and tints of one color
Monochrome Decoration1 like
monochrome decoration
A decorative product that is composed of one color
Monocoque 0 likes
A form of construction where the outer layer of skin absorbs and holds most of the tension
Monocottura 0 likes
A single-fired tile produced via a process which permits the simultaneous firing of the clay with the glaze resulting in a completed tile with just one firing
Monolith1 like
A mass of plain or reinforced concrete formed or constructed as an integral mass or structure existing as its own entity
Monolithic Concrete 0 likes
Concrete that has no joints aside from construction joints; the term is typically used for larger forms
Monolithic Construction 0 likes
Built as a singular piece
Monolithic Tank 1 like
A singular piece of shell construction
Monolithic Terrazzo 2 likes
Adding a 5/8 inch (15 millimeters) terrazzo coating directly to a prepared concrete substrata, removing an under-bed
Monolithic Topping 0 likes
A better standard topping used on concrete flatwork, and placed immediately after the base course is no longer slumping or losing water
Monomer 1 like
A chemical compound that is able to experience and endure polymerization
A natural liquid of relatively small molecular weight that produces a solid polymer by reacting with itself and/or small molecular weight compounds
Monomolecular 0 likes
Single molecules; substances that are a single molecule in thickness
Monomolecular Film 0 likes
Film that is just a single molecule deep; placed above bleeding water at the top of newly positioned concrete or mortar as a curing agent to lower the speed of evaporation
Monopost 0 likes
Moveable metal post that is designed to reinforce a girder or bearing point; generally an 11 gauge or Schedule 40 metal, and decided upon by the structural engineer
Month-to Month Tenancy 0 likes
A written or oral lease of actual property that requires rent to be paid on a monthly basis, for a non-stipulated term; to end this lease, a 30 day notification by either party is mandatory
Montmorillonite 0 likes
See Montmorillonoid
Montmorillonoid 0 likes
A collection of clay minerals that includes montmorillonite which are classified by a sheet-like internal molecular makeup; comprised of extremely narrowly split hydrous aluminum or magnesium silicates that enlarge when wet and diminish when dry
Monument 0 likes
A formation or construction that recognizes something of social, cultural or historical significance
A fixed surveyor’s reference point
Monumental 0 likes
Existing as or pertaining to a monument
Extraordinarily impressive; outstanding; exemplary
Mop and Flop 0 likes
A process by which roofing components including insulation boards and felt plies are firstly placed upside down next to their ultimate locations, are layered with adherents, and are then inverted and added to the substrate
Mop Basin1 like
mop basin
A sink on a floor; also called a Mop Receptor
Mop Receptor 1 like
See Mop Basin
Mop Sink1 like
mop sink
A plumbing fixture with a faucet and a drain and deep catchment area that gathers and disperses water for mopping and other cleaning purposes
Mopping 0 likes
Hot pitch or asphalt layer separated by plies of roofing felt
Sponging and cleaning
Moratorium 0 likes
A legally binding period during which contractual obligations are halted or postponed; usually when a debtor postpones an obligation
Moresque 0 likes
Many colored yarn constructed by intertwining at least two strands of different shades or colors
Morphology 0 likes
The study of the structure and arrangement of things such as organisms
Mortar 0 likes
A combination of cement or lime with water and sand to create a mixture; used in masonry
Mortar Board 0 likes
A three feet square board that collects mortar on a scaffold for a mason; also called Mud Board
Mortar Bond 0 likes
The cohesion or joining of mortar to masonry elements
Mortar Box1 like
mortar box
The tray or box that is used to combine the products used to create mortar
Mortar Hoe 0 likes
This hoe is employed to manually mix mortar; generally has a perforated blade and a handle that is approximately 5 feet and 6 inches in length
Mortar Mix1 like
The quantity of each ingredient named, portland cement, fine aggregate, admixture, and water in mortar
Mortar Mixer2 likes
mortar mixer
Mechanical equipment used to integrate the materials that create mortar, usually controlled by gasoline combustion engines; when small batches of mortar are required, electric mixers are employed
Mortar Pumping Machine 0 likes
The mortar pumping machine is used in conjunction with the mortar mixer; mixed mortar is emptied into the hopper, and a pneumatic gun drives or propels the mortar through a hose to masons and tile setters working well above street level; asbestos fines are combined with the mortar so that the mortar in the hose will remain intact
Mortgage 0 likes
Loan that is enacted and governed by the security and guarantee of land or property
Mortgage Broker 0 likes
A broker who represents a range of lenders and assists consumers to source financially manageable mortgages; the broker receives a fee only if the consumer sources and commences a loan
Mortgage Company 0 likes
A process whereby a company borrows money from a bank in order to lend it to consumers to purchase homes; the company ultimately sells the loans to investors
Mortgage Deed 0 likes
Legal document that stipulates a loan on property
Mortgage Loan 0 likes
A contract where the borrower’s property is promised as a guarantee and repayments are made in installments; the mortgagor pledges to repay principal and interest, ensure that the home is insured, pay all taxes and maintain the property
Mortgage Origination Fee 0 likes
A fee for work involved in setting up and implementing a mortgage application; generally one percent of the loan sum
Mortgagee 0 likes
The lender who provides the mortgage loan
Mortgagor 1 like
The person or entity who is the borrower in a mortgage arrangement
Mortise 0 likes
A gap that is cut into a member, generally on the side in order to gather the tenon or tongue of another board, timber, or plank to create a joint; rectangular hole which houses the tenon, or any incision into or through a piece by a chisel
Mortise Lockset1 like
mortise lockset
A lockset construction or formation with the mechanism placed in a mortised pocket between the door and the frame
Mortise-and-Tenon 0 likes
A joint in which a tenon of tongue-like shape on the end of one piece is firmly placed into a rectangular opening (mortise) in the side of the remaining piece
Mortising Machine1 like
Mortising Machine
A special woodworking machine employed to cut square or rectangular holes in a piece of timber.
Mortuary 0 likes
A building where human remains are stored until funeral, burial or internment arrangements are carried out
Mosaic1 like
Small pieces of porcelain or natural clay materials that create decorative forms and arrangements in a tile
Small tile or pieces of tile, stone, or glass components that produce a design
Moss, Peat1 like
moss peat
See Peat Moss
Motel 0 likes
A hotel by the side of a road that offers accommodation
Motion 2 likes
A request to a judge or decision-making body to affect a determination or judgment
Motor1 like
A revolving machine generating momentum and power for a car, refrigerator, or other devices
Motor Burnout 0 likes
Electric motor failure when the insulation is damaged due to overheating
Motor Control1 like
motor control
An instrument used to start or stop a motor once a particular temperature or pressure condition is reached
Motor Control Switches 0 likes
Switching apparatus which is employed in a motor
Motor Grader 0 likes
A self-propelled apparatus employed for grading earth
Motor Starter1 like
motor starter
High-powered electric switches generally controlled by electromagnets
Motor Stator1 like
motor stator
Immovable component of an electric motor
Motor-Generator Set2 likes
motor-generator set
A movable gasoline motor that also has an electrical generator
Motor, Capacitor1 like
motor capacitor
See Capacitor Motor
Motor, Four Pole 0 likes
See Four Pole Motor
Motor, Two-Pole 1 like
See Two-Pole Motor
Mottling 0 likes
Distinctly and deliberately marked; an unconventional paint color
Mould 0 likes
See Mold
Moulding1 like
See Molding
Mounted Tile 1 like
Tile crafted into units or sheets by appropriate material to aid movement and installation; tile may be mounted in a variety of ways such as face-mounted, edge-mounted, or back-mounted
Movable Louver 1 like
A product with equidistant panels of wood or metal that may be opened or closed to affect air flow and ventilation
Movable Partition2 likes
movable partition
A wall that separates one space from another and can be reconfigured to create distinct walled spaces
Moving, Shrub 0 likes
See Shrub Moving
Moving, Tree 1 like
See Tree Moving
Product of the day

How to Fix Plumbing Noises In Your Home

plumbing fiberglass insulationTo diagnose loud plumbing, you must first determine whether the unwanted sounds occur on the system's inlet side - in other words, when water is turned on - or on the drain side. Noises on the inlet side have various causes: excessive water pressure, worn valve and faucet parts, poorly connected pumps or other appliances, incorrectly placed pipe fasteners, and plumbing runs with excessive tight bends or other restrictions. Noises on the drain side usually originate from poor location or, as with some inlet side noise, a layout with tight bends.


Hissing that occurs when a faucet is opened slightly generally signals excessive water pressure. Consult your local water company if you suspect this problem. They will tell you about the water pressure in your area and if necessary, can install a pressure reducing valve on the incoming water supply pipe.


Thudding, often accompanied by shuddering pipes when a faucet or appliance valve is turned off, is a condition called water hammer. The noise and vibration are caused by the reverberating wave of pressure in the water, which suddenly has no place to go. Sometimes opening a valve that discharges water quickly into a section of piping with a restriction, elbow, or tee fitting can produce the same condition. Water hammer can usually be fixed by installing fittings called air chambers or shock absorbers in the plumbing to which the problem valves or faucets are connected. These devices permit the shock wave produced by the halted flow of water to dissipate in the air, which unlike water, is compressible. Older plumbing systems may have short vertical sections of capped pipe behind walls on faucet runs for the same purpose; these can eventually fill with water, reducing or destroying their effectiveness. The solution is to drain the water system by turning off the main water supply valve and opening all faucets. Then open the main supply valve and close the faucets one at a time, starting with the faucet closest to the valve and ending with the one furthest away.

Chattering or Screeching

Intense chattering or screeching that occurs when a valve or faucet is turned on, and that usually disappears when the fitting is fully open, signals loose or defective internal parts. The solution is to replace the valve or faucet with a new one. Pumps and appliances such as washing machines and dishwashers can transfer motor noise to pipes if they are improperly connected. Link these items to plumbing with plastic or rubber hoses - never rigid pipe - to separate them.

Other Inlet Side Noises

Creaking, squeaking, scratching, snapping, and tapping are usually caused by the expansion or contraction of pipes, generally copper ones supplying hot water. The sounds occur as the pipes slide against loose fasteners or strike nearby house framing. You can often pinpoint the location of the problem if the pipes are exposed; just follow the sound when the pipes are making noise. Most likely, you will discover a loose pipe hanger or an area where pipes lie so close to floor joists or other framing pieces that they clatter against them. Attaching foam pipe insulation around the pipes at the point of contact should resolve the problem. Be sure straps and hangers are secure and provide sufficient support. Where possible, pipe fasteners should be connected to large structural elements such as foundation walls instead of framing; doing this reduces the transmission of vibrations from plumbing to surfaces that can amplify and transfer them. If attaching fasteners to framing is unavoidable, wrap pipes with insulation or other resilient material where they contact fasteners, and sandwich the ends of new fasteners between rubber washers when installing them. Correcting plumbing runs that suffer from flow-restricting tight or numerous bends is a last resort that should be performed only after consulting a skilled plumbing contractor. Unfortunately, this situation is common in older homes that may not have been built with indoor plumbing or that have been through several remodels, particularly by unprofessional contractors.

Drainpipe Noise

On the drain side of plumbing, the main goals are to eradicate surfaces that can be struck by falling or rushing water and to insulate pipes to contain unavoidable sounds. In new construction, bathtubs, shower stalls, toilets, and wall-mounted sinks and basins should be set on or against resilient under-layments to lower the transmission of sound through them. Water-saving toilets and faucets are less noisy than conventional models; install them instead of older types even if codes in your area still allow older fixtures. Drainpipes that do not run vertically to the basement or that branch into horizontal pipe runs supported at floor joists or other framing present especially troubling noise problems. These pipes are large enough to radiate substantial vibration; they also carry significant amounts of water, which makes the situation worse. In new construction, use cast-iron soil pipes (the large pipes that drain toilets) if you can afford them. Their immense size contains much of the noise made by water traversing them. Also, avoid routing drainpipes in walls shared with bedrooms and rooms where people gather. Walls containing drainpipes should be soundproofed as stated earlier, using double panels of sound-insulating fiberboard and wallboard. Pipes can be wrapped with special fiberglass insulation made for the purpose; these pipes have an impervious vinyl skin that sometimes containing lead. Results are not always acceptable.

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