iSpec LLC

Granular materials such as sand, gravel, or crushed stone used as a base layer, mixed into concrete, or applied as a surface material. The size and type of aggregate affects the strength and finish of concrete.

A person learning a skilled trade through on-the-job training combined with classroom instruction. Apprenticeships in construction trades such as electrician, plumber, and carpenter typically last three to five years.

A method of alternative dispute resolution in which a neutral third party reviews the facts of a dispute and issues a binding or non-binding decision. Many construction contracts include arbitration clauses as an alternative to litigation.

The licensed architect legally responsible for the design documents submitted for a building permit. They ensure the design meets all applicable codes and standards.

Updated construction drawings that reflect all changes made during the building process, showing the project exactly as it was constructed rather than as originally designed.

A drilling tool with a helical shaft used to bore holes in soil, wood, or other materials. In construction, power augers are commonly used to drill holes for fence posts, deck footings, and pier foundations.

A horizontal structural member that spans an opening and supports loads from above, such as floors, roofs, or walls. Beams are typically made of wood, steel, or engineered lumber.

A wall that carries the structural weight of the building above it down to the foundation. Removing a bearing wall without proper support can compromise the integrity of the entire structure.

A formal proposal submitted by a contractor outlining the cost and scope of work for a project. Always compare multiple bids to ensure competitive and fair pricing.

A financial guarantee that a contractor will fulfill their contractual obligations. Common types include bid bonds, performance bonds, and payment bonds — all of which protect the project owner if the contractor fails to perform.

A violation of the terms of a contract. In construction, a breach may occur when a contractor fails to complete work on time, delivers substandard work, or does not meet specified requirements outlined in the contract documents.

The process of finishing or customizing an interior space, commonly used in commercial construction when a tenant transforms a raw space to suit their needs.

A set of regulations established by local or state governments that governs the design, construction, and safety standards of buildings. All projects in Columbus, Ohio must comply with applicable building codes.

A skilled tradesperson who works with wood and other structural materials to build, install, and repair structures. Carpenters handle framing, finish work, cabinetry, trim, and formwork.

A flexible sealant applied to joints, seams, or gaps in a structure to prevent air, water, or insects from penetrating. Caulking is used around windows, doors, plumbing penetrations, and exterior trim.

The overhead interior surface of a room. Ceilings can be flat, vaulted, coffered, or dropped, and are typically finished with drywall, plaster, or tile.

An official document issued by a local government agency confirming that a building meets all codes and is safe for occupancy. Required before moving into a newly constructed or significantly renovated space.

A written amendment to the original construction contract that documents any changes to the scope, cost, or timeline of a project. Always get change orders in writing.

A hand tool with a flat, sharpened metal blade used to cut, shape, or carve wood, stone, or masonry. Chisels are used in finish carpentry, masonry work, and demolition.

A set of rules and standards established by government authorities that govern the design, construction, and maintenance of buildings. Building codes exist to protect public health, safety, and welfare.

A vertical structural support member that transfers load from beams or slabs above down to the foundation below. Columns can be made of wood, steel, or concrete.

The act of meeting the requirements of applicable building codes, regulations, and standards. All construction work must be in compliance before inspections can be passed and certificates of occupancy issued.

A building material made from a mixture of cement, water, sand, and aggregate that hardens into a strong, durable solid. Concrete is used for foundations, slabs, walls, and structural frames.

A reserved portion of the project budget set aside to cover unexpected costs or changes that arise during construction. Typically 10–15% of the total project cost.

A legally binding agreement between two or more parties that outlines the terms, conditions, obligations, and expectations of a construction project. A well-written contract protects both the owner and the contractor.

The complete set of documents that define the terms of a construction project, including drawings, specifications, and the signed agreement between owner and contractor.

A construction delivery method where the contractor builds the structural framework and exterior of a building, leaving interior finishes for a later phase or tenant.

A large piece of equipment used to lift and move heavy materials on a construction site. Cranes are essential for placing steel beams, roof trusses, precast concrete panels, and other oversized loads.

A shallow, unfinished area beneath the first floor of a building that provides access to plumbing, electrical wiring, and structural components without a full basement.

The permanent, fixed weight of a building's structural components, such as beams, floors, and walls. Engineers account for dead loads when designing a structure.

A project delivery method where a single contractor is responsible for both the design and construction of a project, streamlining communication and reducing costs and timelines.

A roofed structure containing a window that projects vertically from the slope of a roof, adding light, ventilation, and usable space to an upper floor or attic.

A complete collection of architectural and engineering drawings used to guide the construction of a project, including floor plans, elevations, and structural details.

A panel made of gypsum plaster pressed between two sheets of heavy paper, used to form interior walls and ceilings. Also called gypsum board or sheetrock, drywall is the most common interior wall finish in residential and commercial construction.

The lower edge of a roof that overhangs the wall of a building. Eaves direct rainwater away from the structure and provide shade to windows and walls below.

A means of exit from a building or room in the event of an emergency. Building codes specify minimum requirements for egress windows, doors, and pathways to ensure occupants can safely evacuate.

A licensed tradesperson who installs, maintains, and repairs electrical systems in buildings. Electricians work from blueprints to run wiring, install panels, outlets, fixtures, and ensure compliance with electrical codes.

A scaled, flat drawing showing the exterior or interior face of a building or wall. Used by designers and contractors to visualize vertical surfaces and finishes.

The process of digging and removing earth to prepare a site for a foundation or underground utilities. Often one of the first physical steps in new construction.

A heavy construction machine with a rotating cab and a hydraulic arm used for digging, demolition, and material handling. Excavators are used to dig foundations, trenches, and grade sites.

The front-facing exterior of a building. The facade is the primary visual face of the structure and typically includes the main entrance, windows, and exterior finish materials.

A detailed document specifying all interior finishes for a project, including flooring, paint colors, tile selections, hardware, and fixtures.

Thin strips of metal or other waterproof material installed at joints and intersections in a roof or wall to prevent water infiltration. Common locations include around chimneys, skylights, windows, and roof valleys.

A concrete base placed below the frost line that supports the foundation wall or columns of a structure. Footings distribute the weight of the building across the soil beneath.

The area of land covered by a building's foundation or ground floor. Expanding a building's footprint typically requires additional permits and approvals.

A supervisor who oversees a crew of workers on a construction site. The foreman coordinates daily tasks, ensures work meets quality standards, and communicates between the project manager and field workers.

The structural base of a building that transfers its weight to the ground. Common types include slab, crawl space, and full basement foundations.

The structural skeleton of a building, typically made of wood or steel, that supports walls, floors, and the roof. Framing defines the shape and layout of the structure.

The triangular portion of a wall between the edges of a sloping roof. Gable ends are a common roof style in residential construction and provide attic ventilation.

The primary contractor responsible for overseeing and managing all aspects of a construction project, including hiring and coordinating subcontractors, managing the budget, and ensuring the project is completed on time and to specification.

The process of leveling or sloping the ground around a building site to ensure proper drainage and a stable foundation.

The total floor area of a building measured from the exterior walls, including all interior spaces such as hallways, closets, and mechanical rooms.

A mortar-like material used to fill the joints between tiles, stones, or masonry units. Grout seals the gaps between tiles, prevents moisture infiltration, and provides a finished appearance.

The direct construction costs of a project, including labor and materials. Distinguished from soft costs such as design fees, permits, and financing.

A condition or situation on a construction site that poses a risk of injury or illness to workers. Identifying and mitigating hazards is a core responsibility of every contractor and site supervisor.

A horizontal structural member placed above a door, window, or other opening in a wall to carry the load from above and transfer it to the surrounding framing.

Stands for Heating, Ventilation, and Air Conditioning. Refers to the systems that regulate temperature, airflow, and air quality within a building.

A contractual obligation in which one party agrees to compensate another for losses, damages, or legal costs arising from specified events. Indemnification clauses are standard in most construction contracts.

An official review of construction work by a local building authority to verify it meets applicable codes and approved plans. Inspections are required at key phases — including foundation, framing, rough-in, and final — before work can proceed.

Material used to reduce heat transfer through walls, ceilings, and floors. Common types include fiberglass batts, spray foam, and rigid foam board. Proper insulation improves energy efficiency and occupant comfort.

A horizontal framing member used to support a floor or ceiling. Joists run parallel to each other and transfer loads to beams, walls, or foundations below.

A general construction worker who performs manual tasks such as site cleanup, material handling, demolition, and assisting skilled tradespeople. Laborers are essential to keeping a job site running efficiently.

A tool used to determine whether a surface is perfectly horizontal (level) or vertical (plumb). Levels range from simple bubble vials to digital laser levels used on large commercial projects.

Legal responsibility for damages, injuries, or losses that occur as a result of construction work. Contractors carry liability insurance to protect themselves and their clients from financial losses due to accidents or errors.

A legal claim placed on a property by a contractor, subcontractor, or supplier who has not been paid for work or materials provided. A lien can prevent the property from being sold or refinanced until the debt is resolved.

A legal document signed by a contractor or subcontractor confirming they have received payment and waiving their right to place a lien on the property for that portion of work.

A predetermined amount of money specified in a contract that a contractor must pay to the owner for each day a project extends beyond the agreed completion date. Liquidated damages clauses incentivize on-time delivery.

A wall that supports the weight of the structure above it. Removing or modifying a load-bearing wall requires careful engineering and structural reinforcement.

Wood that has been processed and cut into standardized planks and boards for use in construction. Dimensional lumber such as 2x4s and 2x6s forms the structural framing of most residential buildings.

A skilled tradesperson who works with brick, stone, concrete block, and other masonry materials. Masons build walls, chimneys, fireplaces, and decorative features using mortar and precision craftsmanship.

Stands for Mechanical, Electrical, and Plumbing — the three major building systems that make a space functional. MEP coordination is critical during both design and construction phases.

Custom wood products crafted for a specific project, such as cabinetry, trim, molding, shelving, and built-in furniture. A hallmark of high-end residential and commercial construction.

A workable paste made of cement, sand, and water used to bind masonry units such as brick, stone, or block together. Mortar hardens over time, creating strong, durable joints between units.

The process of building a completely new structure from the ground up, as opposed to renovating or remodeling an existing building. Requires full permitting, site preparation, and all phases of construction.

The Occupational Safety and Health Administration — a U.S. federal agency that sets and enforces standards to ensure safe and healthy working conditions. OSHA regulations govern fall protection, hazard communication, personal protective equipment, and more on all construction sites.

An interior non-load-bearing wall that divides a space into separate rooms or areas. Partitions can be moved or removed without affecting the structural integrity of a building.

An official approval issued by a local government authority allowing construction, renovation, or demolition to begin. Pulling the proper permits protects both the owner and contractor and ensures work is inspected and up to code.

A weight suspended on a string used to establish a true vertical reference line. The term "plumb" refers to being perfectly vertical, and is essential in framing, setting posts, and laying masonry.

A licensed tradesperson who installs and maintains piping systems for water supply, drainage, and gas in residential and commercial buildings. Plumbers work closely with inspectors to ensure all work meets code.

An engineered wood panel made from thin layers of wood veneer glued together with alternating grain directions. Plywood is used for structural sheathing, subfloors, roof decking, and cabinetry.

The individual responsible for overseeing the day-to-day progress of a construction project, coordinating between the owner, design team, and subcontractors to keep the project on schedule and on budget.

A list of outstanding items, touch-ups, or corrections that need to be completed before a project is considered fully finished and final payment is released.

A sloping structural member of a roof frame that extends from the ridge at the top to the wall plate at the bottom, supporting the roof decking and covering materials.

The process of improving, updating, or reconfiguring an existing structure or interior space. Can range from cosmetic updates to full structural changes and typically requires permits depending on scope.

A percentage of each payment withheld by the project owner until the project is substantially complete. Typically 5–10% of the contract value, retainage provides the owner leverage to ensure all work is finished to their satisfaction.

A formal document submitted during construction when clarification is needed on the drawings, specifications, or scope of work. RFIs keep communication clear and documented.

The early stage of installing mechanical, electrical, or plumbing systems before walls are closed up. Rough-in work is inspected before being covered with drywall or finishes.

A temporary elevated platform used to support workers and materials during the construction, maintenance, or repair of a structure. Scaffolding must meet strict safety standards to protect workers at height.

A detailed written description of all the work to be performed on a project. A clearly defined scope of work protects both the owner and contractor and reduces the likelihood of disputes.

A substance applied to a surface to block the passage of fluids or air. Sealants are used on concrete, masonry, wood, and metal surfaces to protect against moisture, UV exposure, and wear.

The minimum required distance between a structure and a property line, road, or other boundary as specified by local zoning ordinances. Setbacks regulate how close a building can be placed to adjacent properties and streets.

Panels of plywood or oriented strand board (OSB) fastened to the exterior of a wall or roof frame to provide structural rigidity and a base for the exterior finish or roofing material.

A flat, horizontal concrete surface used as a floor or foundation. A slab-on-grade foundation is poured directly on the ground and is common in warmer climates.

A vertical framing member in a wall, typically spaced 16 or 24 inches apart. Studs form the structural skeleton of walls and provide a surface to attach drywall, sheathing, and other finishes.

A specialized trade contractor hired by the general contractor to perform specific portions of the work, such as electrical, plumbing, HVAC, or tile installation.

Product data, samples, or shop drawings submitted by the contractor for review and approval by the architect or designer before materials are ordered or installed.

The senior field manager on a construction project responsible for day-to-day site operations, scheduling, safety, and quality control. The superintendent serves as the primary on-site representative of the general contractor.

The process of measuring and quantifying materials needed for a project from the construction drawings. Used by contractors and estimators to calculate accurate project costs.

A surveying instrument used to measure horizontal and vertical angles on a construction site. Transits help establish accurate grades, alignments, and elevations before and during construction.

A pre-engineered structural framework made of triangular units used to support a roof or floor. Trusses are manufactured off-site and crane-set into place, making construction faster and more efficient.

A project delivery approach where the contractor handles everything from design through construction, delivering a fully completed and ready-to-use space to the owner.

The process of reviewing a project's design and materials to find cost-saving alternatives without compromising quality, functionality, or aesthetics.

An official exception granted by a local zoning board that allows a property owner or developer to deviate from the standard requirements of a zoning ordinance. Variances require a formal application and public hearing process.

A thin layer of high-quality material applied over a less expensive base. In construction, brick veneer refers to a single layer of brick applied to the exterior of a wood-framed wall for aesthetic purposes only — it does not carry structural load.

A written guarantee provided by a contractor that their work will meet specified standards and that defects discovered within a defined period after completion will be repaired at no additional cost to the owner.

A skilled tradesperson who joins metal parts together using heat and filler material. Welders are used extensively in structural steel construction, pipeline work, and custom metal fabrication.

Local regulations that govern how land can be used and what types of structures can be built in a given area. Zoning laws affect building height, setbacks, density, and permitted uses.