Term Definition
RMA 0 likes
Rubber Manufacturers Association
Ro 0 likes
Road Base 0 likes
Combination of sand and stone
Road Oil 0 likes
A petroleum oil, heavy and generally Slow-Curing (SC)
Roadway Excavation 0 likes
The task of getting rid of blockages such as boulders in order to create a surface for vehicles to travel on
Robot1 like
A mechanical instrument that is run via automated or machine-driven mechanisms and is utilized in a construction capacity to fulfill work that was formerly undertaken by humans
Robotics 0 likes
Specific form of science focusing on the development, production and use of robots
Rock 0 likes
Solid, firm pieces of the earth’s crust; materials which need blasting before they can be excavated by equipment on site
Rock 1, 2, 3 2 likes
To mount drywall to the walls and ceilings using nails and screws, prior to taping
Rock Anchor 0 likes
A rod or cable that is built into a hard surface with the aim of stabilizing and joining a structure to it
Rock Asphalt 0 likes
See Asphalt Rock
Rock Drilling 0 likes
Boring holes into rock
Rock Flour 1 like
Rock crushed into fine particles to form a powder
Rock Gun 0 likes
An instrument for discharging aggregate onto a cushioned surface in applying marblecrete
Rock Pocket 0 likes
A concrete flaw where a collection of aggregate is not sufficiently enclosed by cement adhesive
Rockwool Insulation 0 likes
Insulation constructed by producing fibers from molten rock and residue; used as protective insulation in ceilings and walls
Rococo 0 likes
An 18th century form of cultural and artistic expression that features elaborate, excessive and deliberate ornamentation; baroque
Rod1 like
A thin implement that can be carried and wielded such as a stick or pole
A unit to measure length, utilized in land measuring, of 16.5 feet
A square-shaped rod, 273.9 square feet
Rod Saw1 like
rod saw
A cutting implement composed of a steel bar approximately 1/8 inch in diameter used to cut circles or uneven arches and contours in tile; surface has tungsten carbide particles
Rod, Ground 3 likes
See Ground Rod
Rod, Guy 1 like
See Guy Rod
Rod, Hanger2 likes
rod hanger
See Hanger Rod
Rod, Tamping1 like
rod, tamping
See Tamping Rod
Rod, Traverse2 likes
rod, traverse
See Traverse Rod
Rodding Off 0 likes
See Floating
Roll 1 like
To place the floor beams or trusses in their appropriate spots
Roll Out 0 likes
The process of completing similar jobs quickly over a designated time
Roll Roof 0 likes
A roof that has been coated with a form of bitumen material that is delivered in rolls
Roll Roofing 0 likes
Asphaltic roof covering, coated felts, polished or mineral surfaced, delivered in rolls
Roll-Up Door1 like
roll-up door
A door which lifts and rolls into a coiled arrangement and descends on tracks on either doorpost
Rolled 0 likes
A brick that is placed with the front jutting out
Rolled Steel Section 0 likes
Rolled steel formed by the application of intense heat and provides support and reinforcement for products including I-beam, wide flange beam, channel, tee, angle, or comparable materials
Roller Blind2 likes
roller blind
A type of blind for windows that is able to be propelled to the top of the window via a recoiling roller
Roller Coating 1 like
Paint or other substance added to surfaces or exteriors by a paint roller
Act of completing an object via the use of solid rubber or steel rollers
Roller Latch1 like
roller latch
A door latch is a mechanical fastener that utilizes a roller activated via springs to create movement
Roller Marks 0 likes
Exterior flaws created during the fabrication process as the gypsum board passes through the various manufacturing processes
Roller Shade2 likes
roller shade
A window covering and sun protector on spring-loaded roller that enables the shade to move vertically
Roller Strike 0 likes
The latch on a door plate with a rotating mechanism at the spot where the latch bolt makes contact thereby reducing resistance
Rolok Wall 0 likes
A relatively inexpensive wall and an alternative to a solid brick wall, combines of a number of exteriors of brickwork placed horizontally or sideways to create a cell-like type of open formation
ROM 0 likes
Read Only Memory
Roman Arch1 like
roman arch
round topped structure
Roman Brick 1 like
A brick that has measurements of 3-1/2 by 2 by 12 inches
Roman Cities 1 like
Guided by the plan employed for military camps, grid iron city blocks; formalized structure and coordination of public access points in the central hub of the city
Roman Numeral 0 likes
The Roman letters comprised of the numbers, I = 1, V = 5, X = 10, L = 50, D = 500, M = 1000
A number in the arrangement of symbols that is based on the ancient Roman system
Romanesque 0 likes
A form of building design common in Europe in the 9th to 12th century, with huge archways, round arches, ornamental arcades, and excessive design and displays
Romex1 like
A well-known type of nonmetallic insulated electrical cable that is used for internal wiring
Rood Screen 0 likes
An ornamental screen dividing the main part of a church from the presbytery
Roof 1 like
The uppermost protective surface of a building or structure
The highest paying limit, a ceiling price
Roof Adhesive 0 likes
A bonding substance used to cement roof products
Roof Assembly 0 likes
A construction made of interconnecting parts, including the roof deck, used to safeguard against water penetration and, generally, to safeguard a building’s exterior
Roof Ballast 1 like
Broken up rock or gravel which is placed on a roof to create its ultimate surface
Roof Bond 0 likes
A legal assurance that a constructed roof adheres to specifications and will be restored or replaced if it fails to meet these specifications within a particular time frame in normal environmental conditions
Roof Contractor 0 likes
A roof contractor, otherwise known as a roofing contractor, installs, fixes and replaces roofs on homes and commercial properties. In most areas, a roof contractor must obtain a business license.
Roof Cricket 0 likes
Small raised area of timber roof built to redirect water around chimney, curb, or other protrusions
Roof Decking 0 likes
Two inch or broader lumber set up on a roof structure
The membrane or exterior of a roof
Roof Drain1 like
roof drain
An outlet or on a roof where substances can be released or discharged
A drainage channel or pipe that gathers water dispelled from a roof and channels it away from the building
Roof Expansion Joint 1 like
A gap between roofing parts to facilitate thermal expansion and contraction
Roof Flashing1 like
roof flashing
A weather protectant frequently used where a roof is penetrated by pipes or columns; prevents the negative impact of nature
Roof Framing 0 likes
The framework or edifice of a roof structure
Roof Hatch1 like
roof hatch
Mass produced, mostly of metal, horizontal access door installed on a curb to allow entry to horizontal or low slanting roofs from the inside of the building
Roof Insulation2 likes
roof insulation
Products used amongst rafters or roof struts for protection from excessive temperatures
Hard, durable sheets of protective material mounted on a horizontal roof
Roof Jack 0 likes
Sleeves that are used in the construction of roofs and placed around the black plumbing waste vent pipes, and are secured by nails to the roof sheeting
Roof Joist 0 likes
The beams of a horizontal roof; wood used to secure the roof sheeting and weight of the roof; typically, those with dimension of 2 X 10 feet and 2 X 12 feet are used
Roof Panel1 like
roof panel
Roof construction consisting of boards, plywood, or metal sheets that can be mounted as a pre-made unit
Roof Ridge 1 like
The highest part of a roof where the roof planes join
Roof Scupper1 like
roof scupper
See Scupper
Roof Sheathing or Sheeting 0 likes
Wood panels or sheet material secured to the roof trusses on which the shingle or another roof cover is placed
Roof Shingle 0 likes
Sections of triangular shaped wood or other elements used in covering courses of a roof, mostly constructed of wood, asphalt, clay tile, or metal
Roof Slab 0 likes
Flat component of a stabilized concrete roof, reinforced by beams, columns and other types of framework
Roof Specialties 1 like
An attachment of edging or bordering employed in the construction of a roof, such as gravel stop, flashing, or vent strip
Roof Spinner 0 likes
An instrument designed for even distribution of air that is fixed on a roof and which uses the wind to produce a rising draft and creating effective ventilation
Roof System 0 likes
A generic term for the entire construction of waterproof covering, insulation, vapor barrier, ballast, and substrate
Roof Valley 0 likes
The V created as a result of two sloping roofs intersecting
Roof Vent1 like
roof vent
A frequently monitored opening on the sloping end or roof structure to permit an uninterrupted movement of air into the space below the roof
The unit installed on a roof that is the end point of a pipe used to distribute air
Roof Walkway 0 likes
A set corridor designed for safe movement across a roof, also acts as a safeguard for the roofing material when repairs are being undertaken
Roof, Asphalt 0 likes
See Asphalt Roof
Roof, Built-Up 0 likes
See Built-Up Roof
Roof, Curb 1 like
See Gambrel Roof
Roof, Fluid-Applied 0 likes
See Fluid-Applied Roof
Roof, Hip 0 likes
See Hip Roof
Roofer 0 likes
A person who builds or fixes roofs
Roofing 0 likes
Products used to construct a roof
The professional skill and capacity to apply roofing materials; a Roofer
Roofing Cement1 like
roofing cement
A generic term for a collection of resins able to be spread including asphalt or tar that are employed in building roofs and during repairs
Roofing Consultant 1 like
A specialist in the planning, specification, building, and repair of roofs
Roofing Felt1 like
roofing felt
A felt sheet saturated with a waterproofing, asphalt-based product
Roofing Nail1 like
roofing nail
A short nail with a wide head
Roofing Removal 0 likes
To discard an old roof system
Roofing Square 1 like
A range or coverage of roofing that is 10 feet by 10 feet
Roofing surface that is 100 square feet
Roofing System 0 likes
A collection of interdependent roof parts with the purpose of weatherproofing and insulating a roof
Rooftop AC1 like
rooftop AC
Air-conditioning product or apparatus built on a roof
Rooftop Heater 0 likes
A heating system built or positioned on a roof
Rooftop Unit 1 like
A process of regulating air in an autonomous or independent system, built immediately above the conditioned area, in a protected space
Room Resonance 0 likes
The reverberations of sound in a confined area, which is contingent upon the interactions that take place between the sound wavelength, the size of the space, and the reflective surfaces
Rooming House 0 likes
A hotel
Root Ball 0 likes
The organic substances that stick to roots of an excavated tree that will be replanted in a different place
Root Buttress 0 likes
An above ground root that connects to the tree trunk
Root Face 1 like
The part of the grooved front next to the root of the juncture in welding
Root Hook 0 likes
An extremely heavy hook that is used to collect and remove large roots when it is pulled across the ground
Root of Joint 0 likes
That part of a juncture to be welded or fused where the components are nearest each other
Root of Weld 0 likes
The juncture at which the base of the weld meets with the basemetal surfaces
Root Opening 0 likes
The gap between the components to be joined at the source of the joint in welding
Rope1 like
A strong cord formed by interlacing strands of hemp, flax, nylon, wire, cotton, or similar material
Rose 0 likes
A thin plate connected to the door hardware behind the door handle
Rose-Window 1 like
A round window with intricate design features and, generally, stained glass; often seen in Gothic churches
Rosette 0 likes
A round design piece or ornament constructed of wood, metal, or plaster
Metal adornment installed into a wall or roof to allow for light and air
Rosewood Veneer1 like
rosewood veneer
A narrow coat of cabinet wood with a dark red or purplish hue interspersed with black, added to create a luxurious, aesthetically pleasing surface
Rosin 0 likes
A tough resin produced from pine trees consisting mainly of isomers of abietic acid; wood rosin is gathered from decaying or lifeless wood utilizing steam separation; gum rosin is produced from the living treerosin and is used in creating varnish and soap
Rot 0 likes
Decomposition; something in the process of decaying
Rotary Blade Compressor 1 like
Apparatus used to circulate fluid by rotating blades within a cylinder
Rotary Compressor1 like
rotary compressor
See Compressor, Rotary
Rotary-Cut Veneer 0 likes
Thin slices of wood cut in a lathe where the wood is turned against a sharp instrument
Rotate 0 likes
To move in a circular motion around an axis or central point
Rotation 0 likes
Twisting movement of an apparatus about a vertical pivot
Rotor1 like
A rotating component in a machine
Rottenstone 0 likes
A brittle sedimentary rock which when crushed is employed in wood finishing; it has minimal cutting action but is suitable for polishing; otherwise called Tripoli
Rough Horse 1 like
See Carriage
Rough Lumber 1 like
Wood products that have yet to be dressed or surfaced but which have been cut, edged, and trimmed
Rough Opening 0 likes
The horizontal and vertical dimensions of a window or door opening prior to the installation of siding or drywall
Rough Sill 1 like
Framing beam placed across the bottom of an incomplete window opening to act as a support during the construction of a window frame; it is connected to the cripple studs beneath the rough opening
Roughing-In 1 like
The first phase of a plumbing, electrical, heating, carpentry, and/or another project, when all the parts that won’t be visible after the second finishing stage are put together; See Heat Rough, Plumbing Rough, and Electrical Rough
Round 0 likes
A dowel made of wood
Round Edge 0 likes
A premade factory edge design with a circular shape
Round Head Wood Screw (RHWS)1 like
round head wood screw
A screw made of wood that has a circular head projecting above the surface; propelled with a screw driver; generally positioned with a washer below the head
Round Pattern 0 likes
Circular shape or formation
Round Wire1 like
round wire
See Loop Pile
Round, Quarter 0 likes
See Quarter Round
Rout 0 likes
To remove part of a substance such as wood in order to make a channel
Router 1 like
Implement used in woodworking that has a fast speed drill piece for purposes such as cutting rebates, dadoes, and creating ornamental or smooth arched edges
Row House 0 likes
One of a number of houses connected by shared sidewalls forming a continuous cluster
Rowlock Course 0 likes
A series of beams placed on their sides rather than on their flat side; a line or sequence of brick laid on their sides mainly used for the ring of curve
Rows 0 likes
The number of longitudinally placed fiber clumps in one inch of Axminster or Chenille carpet; contrast with Wires
Product of the day


A narrow flat ring or a punctured plate employed in joints or units to ensure tautness or reduce friction

flat washer


Our newsletter is packed with huge discounts and construction tips from experts. Be one of the first to have them delivered to your inbox.

Dig Deep Into Construction Resources