Drilling

Concrete boot installation Concrete core-drilling

Core Drilling

Core drilling is performed when precise, circular diameter cuts are needed. Holes up to 60" in diameter can be drilled to virtually any depth. A core drill is a drill specifically designed to remove an annulus of material rather than an entire cylinder of the material being drilled, as a typical auger -type drill bit would. The material left inside the drill bit is referred to as the core.

Core drilling is used for plumbing, electrical, and HVAC installations. Line drilling is an effective method for removing almost any thickness of concrete where other methods cannot be applied. Core holes are drilled in a series of overlapping holes, allowing for one large segment to be removed.

Core drills are used for many applications, either where the core needs to be preserved or where drilling can be done more rapidly since much less material needs to be removed than with a standard bit.

Typical Applications Include:

  • Floor drains
  • Sewer drains
  • Sewer tie-in
  • HVAC openings
  • Phone, electrical, cable and fiber optic opening
  • Handrail and anchor holes
  • Aggregate analysis

Concrete block, solid concrete, asphalt, brick, and steel are all able to be core drilled. Floors and walls are the most common structures to core but requests come in for other structures as well. Core drilling is typically completed using a wet process. If water is an issue, smaller holes can be completed using a dry coring process. If a special angle is required, our operators can setup their core rigs to accurately achieve multiple angles.

Concrete boot installation in manholes

Concrete Boot Installation in Manholes

The EPA requires water tight connections for all sewers containing waste water. We have also provided the rubber boots that insure a water tight connection between the concrete manhole and the new sewer pipe. If we know what size pipe you are installing, our operator will bring the correct boot to your job for you to install after the hole is cored. We stock a large quantity of Kor-n-Seal boots in a variety of sizes to meet your needs.

Saw Cutting

Concrete asphalt sawing

Concrete Asphalt Sawing

City Wide provides sawing services for asphalt contractors throughout Maryland, DC and Virgina. We will saw the perimeter of areas you are replacing to provide a clean edge to improve the appearance of your repair and remove the asphalt.

We can also saw through multiple layers, simultaneously. Asphalt layered over brick and/or concrete is a very common installation for older streets and lots. We have had cases where even sand is an intermediate layer.

Concrete flat sawing

Concrete Flat Sawing

Flat sawing is the most identified diamond cutting method. Flat sawing features a diamond blade that is mounted on a walk behind machine and requires one operator. It is generally used to cut on horizontal surfaces such as floors, bridge decks, expansion joints and pavement.

Flat sawing can be performed with a gas or electric, exhaust-free unit. Generally cuts can be made up to 24" deep. However, we do offer specialized cuts up to 27" deep.

Flat sawing is an efficient means of cutting any aggregate. It is quick and precise, allowing other contracting work to be performed virtually uninterrupted.

Typical Applications Include:

  • Cutting reinforced concrete floors
  • Cutting expansion and control joints
  • Trenching
  • Remove damaged pavement/concrete sections
  • Clean and prepare cracks for repair
Concrete wall sawingConcrete fixture openings

Wall Sawing

Wall sawing employs a circular, diamond blade on a track-mounted system that can be used for vertical and horizontal cuts. This set-up can also be used on steep inclined surfaces where a slab saw cannot be used safely. Wall sawing is typically specified to cut precise openings for doorways, ventilation units and windows. Specialized applications such as finishing roughed-in walls can also be performed.

Wall sawing can be performed up to 24" deep indoors or outside. Cutting can also be performed from both sides of the wall, giving a total depth of up to 48". The wall sawing unit is highly portable and easily set-up for our trained operators. The applications for this type of sawing are endless.

Typical Applications Include:

  • Straight, smooth finished openings in walls, ceilings, and floors
  • Accurately sized, fixture ready openings
  • Bevel cutting

One issue in with round blades is that the corner cuts cannot be completed without over cutting. If the opening is going to be trimmed out or the aesthetics of the cut are not important then overcuts won’t be an issue. With an opening that cannot have over cuts, the chainsaw does a great job of cleaning these corners out as illustrated. This added cost is an affordable solution to the old style way of coring the corners that left scallops that needed to be chipped. Chain sawing is limited in its depth to 30”.

Concrete wall sawing diagram
Hand sawingHand sawing

Hand sawing

Hand sawing refers to the lighter duty use of diamond blades in hand held power and chain type saws. Hand sawing provides portability, speed and accessibility at construction and demolition sites.

Typical Applications Include:

  • Electrical, plumbing, and HVAC openings
  • Ventilation and air conditioning openings
  • Small, tightly accessed areas where cutting is needed
  • Sawing concrete pipe to length
  • Precision trimming
Sawing & Joint Sealing

Sawing & Joint Sealing

Sawing and sealing is a process of green-cutting concrete then sealing the joints with a flexible sealant to prevent cracking and freezing damage. We offer sawing and sealing services for green sawing and sealing of joints, joint widening and compression joint sealing. We install many types of sealant including several types of self-leveling silicones and two-part joint fillers.