Concrete cutting: compare quotes and prices

What should the cutting achieve?

Typical requests include new door or window openings, enlarging an existing opening, reducing a parapet and separation cuts for partial dismantling. Describe the result rather than choosing a machine. The contractor can assess how to achieve the geometry in the existing element and what preparation is needed.

A circular service opening usually falls under core drilling. A complete opening with reinforcement, a new frame and finished walls requires additional work expressly included in the brief. Cutting alone does not automatically include the rest of the alteration.

Useful dimensions for the contractor

For an opening, provide the number, width, height and known thickness. For trimming or separation, the route and total length of the cut line matter. Describe different locations in one shared text with their known dimensions. Unknown wall or slab thicknesses can be assessed on site.

The visible area of an opening is different from the cut surface through the concrete thickness. A rate per square metre therefore cannot simply be applied to the face area of a door. Position, depth, reinforcement and corners also affect the work. Marks and reference points need agreement before work starts.

Consider the later detail too: will a frame sit flush, may a cut extend beyond a corner or must a particular edge face remain? Include these requirements without assuming identical achievable tolerances for every existing element.

Assess the structure and services before cutting

A cut can change load paths, supports or reinforcement. A wall’s thickness or a photograph alone does not reliably establish its structural role. The responsible specialists assess the alteration, any strengthening and the sequence of temporary support, cutting and removal.

Services and use of the space behind or below the element also need consideration. Existing drawings help but do not replace every site investigation. Agree who checks these issues and coordinates other trades.

Existing finishes may require further material investigation. Customers should not make trial cuts into unknown coverings. Where the existing materials are insufficiently known, the scope needs to allow suitable assessment or preparation before invasive work.

Plan for water, dust and the working environment

Diamond equipment allows targeted cuts but does not remove every disturbance. Depending on the method, cooling water and slurry must be collected or dust captured at source. The contractor selects an appropriate method and protection for the location.

In occupied buildings, nearby floors, furniture, services and rooms beneath the cutting point matter. Clarify screening, the equipment route and temporary use of the area. Suitable utility connections and who provides them also need agreement.

A general promise of completely dust-free, silent or vibration-free work is not a dependable description of every job. Compare the actual protective measures, working hours and agreed cleaning instead.

Arrange removal of the cut sections

A cut section can be heavy and needs appropriate support before the last cut. Planning includes dividing the material, handling it and the removal route. The customer should not be expected to calculate weights or help catch and carry concrete pieces.

State whether the contractor should simply detach the sections, leave them at an agreed place on the property or remove and dispose of them entirely. Stairs, narrow doorways and a long route to the vehicle can substantially change the work. Finishing the opening and forming new connections are separate tasks unless the quote includes them.

Compare costs for the same complete scope

Cut length alone does not determine the price. Travel, setup, thickness, reinforcement, awkward orientation and repeated repositioning can all matter. Setup represents a relatively large share of a small opening; several simple cuts are therefore not directly comparable with one complicated cutout.

Ask for quantity-based items and fixed charges to be identified. Where the existing structure remains partly unknown, the quote should state its assumptions and how extra work will be agreed. Check whether VAT is included in the final amount. An old cut-surface tariff is not a reliable current complete price for your project.

Information for an initial request

Start with a short description of the result you need. Provide known dimensions and leave technical uncertainties open. The contractor can decide whether a site visit is necessary before a sufficiently detailed quote.

• Requested work. Identify the element and the desired opening, trimming or separation.
• Count and dimensions. State the number of openings and known dimensions.
• Working area. Give the location, exact floor and access to the working area.
• Removal. Say whether the cut sections should be removed from the property.
• Design and timing. Mention existing design information and preferred timing where known.

Turn the request into a coordinated job

A site visit or follow-up question is particularly useful when the cutting location, existing structure or removal route is unclear. Work follows the necessary professional assessments.

1. Describe the result. Describe the required result and known geometry.
2. Assess existing conditions. Have the existing structure, services and necessary preparation assessed.
3. Compare quotes. Compare quotes for the same cutting, protection and removal scope.
4. Agree the visit. Agree cutting axes, access and work sequence before the visit.
5. Check handover. Check the opening or separated sections and agreed cleaning together.