Diamond drilling is a technique in which a drill is used to remove a cylinder of material, this is usually called a core. Paragon utilise core drills tipped with diamond impregnated segments in order to cut through the substrate, including any reinforcing to leave a smooth sided aperture without the need for percussive breaking.

Core drilling is used by many trades to form holes for: -

Electrical and communication services, cabling, plumbing through walls, floor slabs and ceilings and for holes for dowel or rebar tie-ins or for drainage. Cores can also be extracted for sampling or analysis of aggregate.

Diamond core bits are available in a standard range of sizes from 6mm-600mm in diameter and in extended lengths if required.

Paragon have invested in drilling equipment that can core holes at an angle or inverted if required.


Drilling a series of overlapping holes, or ‘Stitch’ drilling, can be used to form larger diameter holes or eccentric shapes for equipment to fit through for instance. Stitch drilling can also be used to form openings or isolate areas that are too thick for circular saw blades to cut through.


Floor sawing is carried out using a walk-behind saw, usually self-propelled, equipped with a circular diamond tipped blade. Paragon has access to blades from 450mm up to 1200mm diameter enabling a depth of cut in excess of 500mm.

For external work a Diesel powered saw would be utilised but for internal or areas where exhaust fumes could be an issue a 3phase electric machine is the preferred tool for the job.


Diamond Wire is a continuous steel cable with diamond impregnated beads spaced 10mm to 30mm apart. The wire is passed around the area that needs cutting and around the wire saw pulleys. Both ends are then joined together, to form a loop, using a hydraulic crimping tool enabling cutting to commence.

When cutting, a continuous stream of water is used to lubricate & cool the wire and remove the concrete in a slurry form and to act as a dust suppressant.

Wire Sawing is ideal for cutting large concrete masses at high speed and also avoids overcutting. Holes are drilled to place the wire saw precisely where you want to start and end the cut. To remove a section of concrete with a circular blade, overcutting or stitch drilling is required on the corners.

This technique is also suitable for cutting through cast iron pipes & steel beams, vessels or tanks where hot works may be an issue.


Track Sawing is technique using a system of guide tracks mounted to the substrate. The head is attached to these guide tracks enabling it to traverse along their length. The blade is mounted onto the cutting head and aligned with the cut line.

This technique is extremely accurate and can be used to form openings in walls and soffits up to 1000mm thick, in reinforced concrete and masonry.

Typical applications include:

  • Straight smooth finished opening in walls & floors i.e. door or window openings.
  • Create precise cuts in vertical or horizontal surfaces for lift shaft or stair openings
  • Isolating concrete staircases prior to deconstruction.
  • Being either electrically or hydraulically powered they are ideal for Confined Spaces.

We can also offer a Flush Cutting system if required.

Flush cutting means that the blade can be used tight up against a wall without leaving a stub.


The flush cutting technique allows a saw cut to be made at the bottom of a wall, through a floor slab or through an adjoining wall leaving a flush finish instead of a stub that requires further work to remove.

For example, if you wanted to remove a section of wall that was attached to a column the flush cutting method will leave no stub on the column which negates remedial breaking works and any making good (see photos below).

This technique can also be used to cut flush with a soffit, through a 90° adjoining wall or down through a slab leaving the finish flush with the remaining structure.

In Addition

We work in conjunction with a small number of extremely professional specialist contractors. Should you require Hydro-Demolition, Concrete Scanning / Ground Penetrating Radar or Traditional Demolition we would be pleased to put you in direct contact with one of our reputable contacts.



What is Selective Demolition?

Selective demolition (sometimes called deconstruction) uses carefully planned & sequenced activities to isolate or remove areas of structure without damaging the integrity of the remaining.

Selective demolition is an ideal solution when you want to alter or improve a building without demolishing it completely.

By using Cut & Carve techniques and using lifting equipment or utilising robotic equipment to reduce the structure after isolation we are able to offer greener solutions for exterior and interior projects. We approach each job with attention to safety, detail and your programme.

Examples of Selective Demolition Projects

  • Create door or floor openings
  • Remove stairwells
  • Altering buildings so they serve a different purpose.
  • Equipment and component removals
  • Prepare a building for structural modifications.

Clients with unusual construction situations count on our team to provide carefully planned solutions that are safely executed in even the most challenging environments.



This is a virtually silent method of breaking concrete that uses a hydraulic power unit, which can be powered by electricity, diesel or petrol. Holes are drilled into the structure at pre-determined positions. The diameter and the spacing of the holes depend on the type of equipment being used. Once the holes have been completed the head is inserted into the holes. Pressure applied from the hydraulic power pack via the hoses and the pistons will induce cracks in the substrate. Providing the head is correctly positioned the cracking will follow a plane of weakness to the adjacent hole. The process is repeated until the whole area is fractured and ready for removal. Bursting is an aid for deconstruction normally used in conjunction with percussive breaking techniques – usually either diesel or electrically powered machines



We can assist with the preparation of Estimates for large and small contracts including Cut & Carve Deconstruction and Hydro-Demolition.