Precise Concrete Coring, No Collateral Damage

Yes, core drilling can be performed in occupied spaces, provided proper safety precautions are in place. Advanced equipment and techniques such as water cooling and vacuum systems help minimize noise, dust and vibrations. This ensures minimal disruption to occupants while maintaining a clean and safe environment.

Core drilling can be executed at various angles to meet project-specific requirements. Specialized rigs and adjustable drilling systems allow operators to achieve precise angled cuts in walls, ceilings, or floors without compromising accuracy or safety.

Permits and inspections may be required depending on the project’s location and scope. For example, drilling in load-bearing structures or public infrastructure can pose safety challenges if not executed properly. These types of jobs often necessitate approval from local building authorities.

Yes, we provide real-time monitoring of dust and debris levels during core drilling. This is done using advanced dust collection systems and monitoring equipment to ensure compliance with health and safety standards, particularly in sensitive or occupied environments.

Concrete coring companies use diamond-impregnated core bits mounted on electric, hydraulic, or pneumatic drill rigs. Bit diameter ranges from small 1-inch bits used for conduit openings to large-diameter bits exceeding 60 inches for manhole installations. Continuous tubing systems allow for very deep drilling, and vacuum anchor systems secure the rig to the work surface without requiring floor penetrations. Water or air cooling keeps bits sharp and reduces concrete dust.

Method selection depends on the required hole diameter and depth, the concrete’s reinforcement (rebar, post-tension cables), site access, and whether the space is occupied. A qualified coring contractor will also scan the concrete prior to drilling to identify embedded utilities or structural steel. Penhall uses GPR and digital X-ray scanning to confirm safe drilling paths before any bit touches the surface.

Yes. Core samples extracted during the coring process can be sent to a laboratory to test compressive strength, assess carbonation depth, check for chloride intrusion, or evaluate aggregate quality. Coordinating sample extraction with the coring crew reduces mobilization costs and shortens the analysis timeline.

Concrete coring is often one step in a broader repair or restoration scope. Contractors frequently core existing slabs or walls to remove damaged sections, create access for repairs to embedded systems, or install new anchor points. Penhall offers a full range of concrete services, and our team can advise on the right sequence of work for your project.

Duration depends on the number of cores, hole diameter, concrete depth, and reinforcement density. A single small-diameter core in an unreinforced slab can take under an hour. Projects requiring multiple large-diameter cores or deep drilling into heavily reinforced concrete may run several days. Your Penhall project manager will provide a timeline estimate during the quoting process.

Pricing is based on the number of cores, the diameter and depth of each hole, the concrete type and reinforcement, site access conditions, and the mobilization distance. Occupied-space projects requiring additional dust control or off-hours scheduling may carry a premium. Contact Penhall for a project-specific quote.

Safe coring starts before the drill turns. The concrete should be scanned to locate embedded utilities, post-tension cables, and rebar. On site, standard precautions include wet cutting to suppress silica dust, secured equipment anchoring, barricaded work zones, and proper PPE for all crew members. Penhall maintains a documented safety program and an industry-leading safety record across all concrete services.

Look for a company with verifiable experience in your project type, certified operators, a written safety program, and current liability insurance. Ask for references from comparable projects and confirm the company owns (rather than rents) its fleet, which typically indicates deeper technical knowledge and faster mobilization. Penhall has operated as a licensed contractor nationwide for over 65 years and welcomes reference requests.