Term Definition
Dado 1 like
Groove in a board or panel to attach the edges of connecting boards or panels
Dado Joint 2 likes
A joint with a groove attaching the piece that forms the joint’s other part
Dairy 3 likes
A room or building for the processing, sales, or storage of milk and milk products
Dalton’s Law 2 likes
Vapor pressure created in a container by a combination of gases is equal to the sum of the individual vapor pressures of the gases
Damages 2 likes
Money awarded to a plaintiff to compensate for loss as a result of a defendant’s wrongful conduct
Dammar 4 likes
A natural resin extensively used to prepare lacquers and varnishes; normally classified according to the place from which it is shipped to market, such as Hong Kong dammar
Damp Check 1 like
See Damp Course
Damp Course 2 likes
A course or layer of impervious material which stops capillary moisture entry from the ground or a lower course; also called Damp Check
Damp Location 1 like
A location with a reasonable amount of moisture, such as cold storage warehouses, basements, barns, and similar areas
Damper 1 like
A metal door installed in a fireplace’s chimney; normally closed when the fireplace is not being used
Damping 2 likes
Dissipation of structure-borne noise by the transformation to an alternate form of energy, such as heat; normally achieved by utilizing a materials with a high internal energy-absorbing limit
The rate at which natural vibration decays due to energy absorption
Dampproofing 1 like
Tar-like black waterproofing material applied to a foundation wall’s exterior
Dap 1 like
To cut and produce a recess in timber to create a dapped joint; also referred to as a let-in joint, where 1 by 6 inch diagonal bracing is cut into 2 by 4 inch studs
Darby 2 likes
A straightedge manipulated by hand, normally 3 feet to 8 feet (1 meter to 2.5 meter) long, employed in leveling during the early stages of concrete placement, before additional finishing and floating
A stiff straightedge, about 42 inches long and 4 inches wide with of metal or wood handles, employed to level wet plaster’s surface
Darkroom 1 like
A room for photography work, without normal light
Darkroom Dryer 2 likes
A mechanical device for drying employed by a photographer to dry prints in a darkroom
Darkroom Equipment 3 likes
Equipment employed to develop photographs
Darkroom Sink 1 like
A photographic darkroom’s basin for holding or dispensing liquids
Dash Bond Coat 1 like
A thick mixture of portland cement, water, and sand; flecked onto surfaces with paddles or brushes to provide a base for additional portland cement plaster coats; sometimes employed to finish plaster
Dash Brush2 likes
dash brush
A long-bristled brush, employed to fling a plaster mixture as a dash coat on a wall
Date of Agreement 1 like
Normally on an agreement’s front page; if not located on the front page, the date may be opposite the signatures when the agreement was signed, when it was recorded or when the contractor was actually awarded the contract
Date of Commencement of the Work 2 likes
The date established to proceed, in a written notice from the owner to the contractor
Date of Substantial Completion 1 like
The date certified by the architect to signify the completion of work or a specific part in accordance with contract documents, enabling the owner to occupy the property or use the specific part for the desired purpose
Datum 2 likes
A fixed starting point for measuring or surveying
An amount of information
Daub 4 likes
A dollop of adhesive
Daylight 2 likes
The terminal end of a pipe, unattached to anything
Db 3 likes
DB 3 likes
Dry Bulb
DBA 1 like
Doing Business As
DBIA 2 likes
Design/Build Institute of America
Dbl Conduit 2 likes
Double thick conduit
Dbl Duct 2 likes
Double thick metal duct
DC 2 likes
Direct Current
DE 4 likes
Diatomaceous Earth
De Facto 3 likes
In reality; actually; in fact, even though not official
De Jure 3 likes
Legally accepted; by right or of right
De-humidistat 1 like
A control device that regulates a mechanical ventilation system, based on the relative humidity in a home
Dead Bolt2 likes
dead bolt
A security lock installed on exterior entry doors activated only with a thumb-turn or key; a lock bolt with no spring action or bevel that is operated by a key or a turn piece
Dead Burned 1 like
Totally removing water content during the process of calcining gypsum
Dead End 1 like
A branch leading from a vent, soil, or wastepipe-building drain sewer that does not let air or water enter the piping system
Dead Flat 1 like
Paint that has no gloss
Dead Front 1 like
Switches, circuit breakers, switchboards, control panels, and panel boards designed, constructed, then installed so that no current-carrying parts are exposed on the front
Dead Knot 1 like
Loose wood knot, normally darker in color
Dead Level 1 like
A precisely horizontal roof slope
Dead Level Asphalt 2 likes
Roofing asphalt with softening point of 140° F (60° C)
Dead Light 2 likes
The immovable, non-operable section of a window
Dead Load 1 like
The load created by the vertical weight of all permanent structural and nonstructural facets of a building, including roofs, walls, and floors
Dead Man’s Switch 2 likes
A switch remaining in the on or off position only if it is held there manually
Dead Space 0 likes
Space with a lot of absorptive surfaces that does not support sound
The space between walls, or a floor and the ceiling
Deadening 2 likes
Construction to inhibit the transfer of sound
Deadlock4 likes
A lock equipped solely with a deadbolt
Deadman 2 likes
A heavy or large object buried in the ground to serve as an anchor
Deaeration 2 likes
Process of taking out air from substances
Deal 1 like
Softwood timber
Debris 2 likes
Accumulated fragments of waste; rubbish, trash and the like
Debt 0 likes
Owed money
Debt, Long Term 2 likes
See Long Term Debt
Debt, Short Term 1 like
See Short Term Debt
Debtors 0 likes
Entities or individuals that owe money to a business; accounts or notes receivable
Decal 1 like
Decalcomania 3 likes
Images on specially prepared paper, that are transferable to glass or other surfaces; also called a Decal
Decay 3 likes
The decomposition of wood or other substances and surfaces as a result of fungi or bacteria
Dechlorination2 likes
Chlorine Neutralizer - 40 Lb
Removing chlorine from water
Decibel (db) 1 like
Standard unit to measure the transmission of airborne sound levels; the ratio of sound pressure to a base level selected at the hearing threshold, ranging up to 130 for the average pain level
Deciduous 1 like
Trees that lose their leaves every year
Decimal 1 like
A real number stated in base 10
Decimal Fraction 2 likes
A fraction or mixed number where the denominator is a power of 10, normally notated with decimal points, as 3/4 = 75/100 = 0.75
Deck 2 likes
Installing plywood or wafer board sheeting on the floor joists, rafters, or trusses
Deck Coil 2 likes
See Coil Deck
Deck Insulation5 likes
deck insulation
Narrow sheets of insulation placed on a concrete surface preceding flooring system installation
Deck Level Pool 0 likes
Water surface level at the same level as the deck
Deck Mud 0 likes
See Floor Mud
Deck Paint3 likes
deck paint
Enamel with high resistance to mechanical wear; used on surfaces such as deck floors
Decking 2 likes
Material employed to span across beams or joists to create flooring or roof surfaces
Surfaced area around a swimming pool
Weighted plank flooring on a pier or bridge
Decking, Cellular 2 likes
See Cellular Decking
Decking, Metal2 likes
decking metal
See Metal Decking
Decking, Open 1 like
See Open Decking
Decking, Wood 1 like
See Wood Decking
Declaration of Homestead 1 like
See Homestead
Declining Balance 4 likes
Increased depreciation where a larger amount is taken in the beginning years, slowly declining in later years
Decor 1 like
The style, decoration, furnishing, and layout of building interiors
Decorated 0 likes
Adorned, embellished, or made more appealing with color or surface detail
Decoration 2 likes
The undertaking of decorating
Finish employed over gypsum board face
Decoration, Inglaze 0 likes
See Inglaze Decoration
Decoration, Overglaze 2 likes
See Overglaze Decoration
Decoration, Underglaze 0 likes
See Underglaze Decoration
Decorative Painting 1 like
Architectural or aesthetic painting
Decorative Tile1 like
decorative tile
Tile with ceramic decor on its surface
Decoupling 1 like
Taking apart elements to slow the transmission of structural-borne sound, thermal conductance, or physical loads
Dedicated Circuit 0 likes
An electrical circuit that services only one appliance such as a refrigerator, or several electric heaters or smoke detectors
Dedication 0 likes
Appropriating land or easements for public purposes or usage by a private owner
Deed of Trust 0 likes
See Trust Deed
Deed Restrictions 2 likes
Limiting covenants often provided in a deed which may restrict future uses of the land, and other limitations such as height, size, and aesthetics, so long as they do not compromise public interests
Deeds 0 likes
All documents conveying property, from one person to another
Deep Color 3 likes
Intense or vivid color with no obvious presence of black
Deep Seal-P Trap 1 like
A P-trap with a water seal depth of four inches or more
Default 1 like
To breach of mortgage contract by not meeting the required payments
Defect 0 likes
An imperfection, a flaw
Defendant 0 likes
A party who is accused of wrongdoing via a legal claim in a law suit
Deferred Maintenance 0 likes
Repair or upkeep that has been ignore, neglected or postponed
Deficit 2 likes
An economic shortfall, where expenses surpass income; a negative balance in the retained earnings account
Deflection 3 likes
A variation in the position or shape of a structure or structural part as a result of load or volume change, normally measured as a linear deviation from an established plane
Displacement or bending of a structural part by an external force
Deformation 0 likes
The change in shape of a body caused by a force being applied; deformation is proportional to the force within the material’s elasticity limits
Deformation, Eutectic 2 likes
See Eutectic Deformation
Deformed Bar 0 likes
A steel reinforcing bar with deformations such as bumps, lugs, or ridges to provide a locking anchorage with the concrete around it
Deformed Reinforcement 0 likes
Warped reinforcing bars, bar and rod mats, and wire fabric
Defrost Device 4 likes
Refrigerating cycle in which ice and evaporator frost are melted
Defrost Timer1 like
defrost timer
Device connected to electrical circuit which turns the unit off for enough time to enable ice and frost accumulation on the evaporator to melt
Defrosting 0 likes
Removing frost from evaporators
Defrosting Control 3 likes
Device that automatically defrosts the evaporator; may operate using a clock, door cycling mechanism, or during the off part of a refrigerating cycle
Defrosting Type Evaporator 0 likes
Evaporator operating at temperatures so that ice and frost on the surface can melt during the off part of operating cycle
Degradation 0 likes
Reduction in quality; degeneration of quality
Degreaser1 like
Chemical solution that removes grease
Degreasing 0 likes
Solution or solvent employed to take oil or grease off refrigerator parts
Degree 0 likes
Unit of measurement on one of the temperature scales
Unit of measurement of angles, equal to 60 minutes; a right angle is 90 degrees
Degree Day 1 like
Unit representing one degree of difference from inside temperature and the average outdoor temperature for one day; estimates fuel requirements for a building
Degree Day Method 1 like
Method of calculating fuel requirements for HVAC systems; see Degree Day
Degree of Saturation 0 likes
Amount of water in the air in relation to the maximum capacity it can hold at a specific temperature without causing condensation
Dehumidification 1 like
Removal of moisture from air
Dehumidifier6 likes
A device which extracts moisture from the air
Dehydrated Castor Oil 0 likes
A drying oil produced from castor oil
Dehydrated Oil 0 likes
Lubricant which has little to no water content after a removal process, also called Dry Oil
Dehydration 1 like
The procedure of extracting water from another substance
Dehydrator 1 like
See Drier
Dehydrator Receiver 0 likes
A small tank serving as a liquid refrigerant reservoir which also contains desiccant to extract moisture; frequently employed in automobile air conditioning installations
Delamination 1 like
Separation of the plies or folds in a panel as a result of failed adhesive; normally due to too much moisture
Delay 1 like
Time loss; or postponing a part of a construction schedule
Delicatessen Case 0 likes
A refrigerated cabinet employed for the displaying and storing of perishable food items
Delignification 2 likes
Elimination of part or all of the lignin from wood through treatment with chemicals
Deliquescence 0 likes
Absorbing atmospheric moisture by a solid substance
Delivery Cart2 likes
delivery cart
A two or four-wheeled vehicle employed to move goods; can be lightweight or heavy
Delivery Tolerances 1 like
In asphaltic concrete making, allowed variables from the precise, desired proportions of aggregate and bituminous material delivered into a pugmill
Delta 2 likes
4th letter in the Greek alphabet, the capital symbol has an equilateral triangle shape
Numbered marking on contract drawings to identify adjustments
Anything justly shaped
The alluvial material deposit at the mouth of a river, where it meets a larger body of water
Delta Transformer 0 likes
Three-phase electrical transformer in which the ends of each of three windings connects electrically to form a triangle
Delustered Nylon 1 like
Nylon of which the normally high sheen has been treated and removed
Demand Factor 1 like
The demand of any system; the ratio of the maximum demand of the system to its total connected load; the loads of a system are rarely on simultaneously due to the multiple uses of power; between the maximum connected load and the actual usage, a load exists that is considered to be the maximum demand
Demand Meter 1 like
Instrument which records the kilowatt-hour usage of a circuit or group of circuits
Demise 1 like
Transfer of property by means of a will, grant, or lease
Demised Premises 0 likes
Property leased
Demising Walls 2 likes
Boundaries that separate personal space from the neighbors’ space and from the public corridor
Demography 0 likes
Study of human populations, including their size, growth, density, and distribution, and statistics regarding birth, marriage, disease, and death; employed to identify markets
Demolish 1 like
To destroy, raze, or tear down a structure or building
Demountable Partition 0 likes
An assembly created to be dismantled and reassembled with a minimal loss of the parts
Demur 2 likes
To object, or take exception
Demurrage 0 likes
A charge for detaining a freight car, ship, or truck during the unloading period
Demurrer 1 like
A response in a court proceeding in which the defendant does not refute an allegation’s truth, but instead claims there are not sufficient grounds to justify legal action; also known as an objection
Den 1 like
Private room in a home, where people pursue their hobbies and recreation
Denatured Alcohol2 likes
denatured alcohol
Ethyl alcohol or grain inappropriate for beverages due to the addition of poisonous compounds
Dendrochronology 0 likes
The science of dating events and variations in environment from former periods by comparing growth rings in trees or aged wood
Dendroid 1 like
Treelike in form
Dendrology 0 likes
Study of trees
Denier 1 like
System of yarn count in synthetic fibers; the weight in grams for each 9,000 meters of yarn length; one denier is equivalent to 4,464,528 yards per pound or 279,033 yards per ounce
Dense-Graded Aggregate 0 likes
An aggregate with a particle size distribution such that when it is compacted, the resulting space between the particles is relatively minor
Densification 0 likes
Increasing the density of a mixture during compaction
Density 3 likes
Amount per unit volume, unit area, or unit length; expressed as pounds per cubic foot, kilograms per cubic meter, or grams per cubic centimeter for wood with specific moisture content
Closeness in texture or consistency of particles in a material
Density, Pile Yarn 0 likes
See Pile Yarn Density
Dental Equipment 0 likes
Equipment employed for dental work on patients
Dental Light 1 like
An adjustable lamp employed by dentists, with an arm-like extension that allows it to be manipulated in any direction, and focuses light in one direction
Dentil 0 likes
One of a set of small, projecting rectangular blocks which form a molding, or part of a cornice
Deodorizer1 like
Mechanism which absorbs or adsorbs odors, normally through absorption; activated charcoal is commonly employed
Deposit 1 like
Natural resource, such as iron ore
Material, such as sediment, which has settled
A returnable sum of currency usually paid for safekeeping purposes, or to guarantee the return of an object
Deposited Metal 1 like
Filler metal included during welding operations
Deposition 0 likes
The testimony of a witness given under oath, outside of the court
The written record of this testimony
Depository, Night 0 likes
See Night Depository
Depreciation 0 likes
The decrease in value of property due to any reason
Derrick 3 likes
A hoisting frame with gear, ropes, a long beam, and pulleys that raises a heavy load and swings it to the side
Desiccant1 like
A drying material
Substance employed to collect and retain moisture in refrigerating system; common desiccants include silica gel and activated aluminum
Design 1 like
A graphical representation consisting of plan views, exterior and interior levels, sections, and other drawings and details to visualize the purpose or goal for a building or structure; conceive or plan mentally
Design Concept 0 likes
An architectural idea displayed in drawings and in its specifications, anticipated to be properly executed by the contractor
Design Development Drawings 1 like
Drawings drafted by architects for the Design Development Phase
Design Development Phase 1 like
Second phase of an architect‘s basic services in which the architect prepares drawings and other presentation documents to describe the size and character of the entire project pertaining to architectural, structural, mechanical and electrical systems; materials and other essentials are included where appropriate; the architect also submits a statement of the probable construction cost
Design Displacement 0 likes
The design-basis earthquake lateral displacement, excluding displacement caused by actual and accidental torsion, necessary to design the seismic isolation system
Design Filter Rate 0 likes
See Design Rate of Flow
Design Head 0 likes
The total head requisite of a circulation system at the design flow rate
Design Heat Load 2 likes
Total heat loss from a building under the potential, harshest winter conditions
Design Pressure 0 likes
Highest or most intense pressure anticipated during operation; sometimes calculates operating pressure with an allowance for safety
Design Professional 0 likes
Skilled person educated in the areas of building design or related structural and environmental systems
Design Rate of Flow 0 likes
Rate of flow (in gallons) divided by the turnover time (in minutes) in a pool or spa; also known as the Design Filter Rate
Design Temperature 1 like
A temperature near the lowest anticipated for a location, employed to gauge design heat load
Design-Build 1 like
A project completion system in which the same entity is responsible for both the design and its construction
Design-Build Construction 2 likes
When a prime contractor negotiates or bids to provide design and construction services for an entire project
Design-Build Institute of America 1 like
1331 Pennsylvania Avenue, NW, 4th Floor, Washington, DC 20004, Tel: (202) 682-0110, URL: www.dbia.org/
Design-Construct Contract 2 likes
A written agreement between a contractor and owner where the contractor undertakes providing both design and construction services
Destructive Distillation 0 likes
Distilling a solution at a temperature so high that the resulting products have a different chemical composition than the original material
Destructive Testing 0 likes
Testing of building materials in a destructive manner
Detail 0 likes
An individual separable part of something
Large, graphic scale representation of construction components, displaying all the materials, composition and dimensions
Detectable Warning 0 likes
A standardized surface or feature on walking surfaces or similar elements to warn visually impaired persons of dangers and hazards in their path
Detector, Leak2 likes
detector leak
See Leak Detector
Detector, Smoke1 like
detector, smoke
See Smoke Detector
Detergent2 likes
Cleaning solution or powdery substance
Deterioration 0 likes
Depreciation; value loss of property due to physical wear and tear; worsen in quality, value or strength
Determinate 0 likes
With defined definite limits
Statically Determinate; see Statically Determinate Structures
Developed Length 0 likes
The length measured along the center line of a pipe and its fittings
Development Length 1 like
Length of steel needed to develop the required bond between reinforcing and adjacent concrete in reinforced concrete
Device 1 like
A specifically designed piece of equipment or a mechanism that serves a given purpose or function
A unit of an electrical system intended to transfer electric energy without using it
Device Control 0 likes
Device for operating a refrigerating system to melt the accumulated ice and frost
Device Cover2 likes
device cover
Protective or ornamental removable cover enclosing an electrical device
Devil’s Float 1 like
Wood float with two nails jutting out from its toe to coarsen the surface of the brown coat in plastering
Dew 0 likes
Condensed atmospheric moisture deposited on cool surfaces in droplets
Dew Point 1 like
Temperature at which vapor, at 100 percent humidity, starts condensing and depositing itself onto cold surfaces as a liquid
Dew-Point Temperature 2 likes
Temperature at which condensation begins
Dewatering 1 like
Extraction of water from the ground or excavations by pumps, well points, or drainage systems
Dextral 1 like
Right handed
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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