Contract Specifications: What They Are and What They Contain

Before a site opens, the contractor and the client must agree not only on the price but also on how the works will be carried out. Materials, working methods, timescales, checks: all of this belongs in the contract specifications.

In this article we look at what they are, how they differ from the bill of quantities and the contract, what they usually contain and how to manage specifications and estimates without losing the link with the site.

What contract specifications are

Contract specifications are a contract document setting out the technical requirements and methods of execution of the works, together with timescales, penalties and payments. In Italian they are called "speciale" because they are specific to a particular project: they describe that work, with its characteristics and rules.

The specifications are the reference that the contractor and the client turn to during the works when they need to clarify how a work item must be carried out, which material must be used or what the consequences of a delay are. That is why they must be clear, complete and consistent with the other contract documents.

Depending on the case, they may be accompanied by other technical documents, such as drawings, reports or price lists. The specifications coordinate them, establishing how they should be read together and which prevails in case of doubt, as agreed by the parties.

How they differ from the bill of quantities and the contract

Specifications, bill of quantities and contract are linked documents with different functions. Put simply:

The bill of quantities lists and measures the work items, applying a unit price to each one to estimate the cost of the work. The specifications, on the other hand, describe the rules by which those work items must be carried out. The contract is the agreement between the parties and normally refers to the specifications and the other documents as an integral part.

The three documents must be consistent with each other: a work item in the bill of quantities should have its requirements in the specifications, and vice versa. Inconsistencies between documents are one of the most frequent causes of disputes during the works.

For the contractor, this coordination has a direct impact on the estimate: prices calculated on a bill of quantities that ignores a requirement in the specifications may not cover the real costs. For the client, consistent documents mean fewer variations and fewer disputes during the works.

Typical contents

The contents vary depending on the type of work and contract. By way of example, contract specifications often contain:

• Scope of the works: description of the work and the work items planned.
• Technical requirements: characteristics and quality of materials, installation and execution methods.
• Methods of execution: sequence of work items, site organisation, checks and tests.
• Timescales: duration of the works, intermediate and final deadlines.
• Penalties: consequences of delay or non-performance.
• Payments: methods and timing, for example interim payments based on progress valuations.
• Measurement and valuation: how the work carried out is measured.
• Final testing or inspection: how the correct execution of the work is verified.

The link with payments is particularly important: the rules in the specifications determine how progress valuations will be prepared. We discuss this in the article on progress valuations in construction.

In private works the specifications can be leaner, but the logic remains the same: put in writing, before starting, the rules that will guide the execution of the works. Even simple specifications avoid many misunderstandings.

How to read and use them on site

Specifications are only useful if the people working on site know them. Some good practices:

• Read them before the estimate: technical requirements affect the time and cost of work items.
• Highlight critical points: specific materials, mandatory checks, intermediate deadlines and penalties.
• Link them to the work items: each site phase should have the requirements that concern it close at hand.
• Keep them up to date: any agreed variations must be recorded in a traceable way.
• Share them with the companies involved: subcontractors also need to know the requirements that concern them.

The practical problem is that specifications are often a long document, consulted only at the start and then forgotten in a folder. Turning them into an operational tool means breaking them down and linking them to day-to-day work.

How to manage specifications and estimates

Managing technical specifications in IntraThor Bill of Quantities and Cost Control follows exactly this principle:

1. Importing the specifications into the platform.
2. Breaking them down by work item, so that each item can be managed individually.
3. Converting them into tasks and work phases, ready for site planning.
4. Monitoring costs and progress for each work item, comparing planned and actual.

The same module handles estimates, progress valuations and cost control, and within IntraThor construction software it is linked to site management. This way the specifications do not remain a static document but become the basis for planning and control. For complete management of sites, staff and suppliers, discover IntraThor Construction.

A further benefit is comparability: when several sites are managed with the same logic, it becomes easier to compare estimates and final costs, identify the work items that tend to overrun and improve future estimates.

Mistakes to avoid

• Estimating without reading the specifications: requirements that are overlooked become unexpected costs.
• Inconsistent documents: items in the bill of quantities but not in the specifications, or described differently.
• Undocumented variations: changes agreed verbally that are never put in writing.
• Specifications not shared: those carrying out the works do not know the requirements they must meet.
• No link with progress: without comparing planned and actual, costs and delays come to light late.

In short, contract specifications are the document that sets the rules of the game. Reading them carefully, keeping them consistent with the bill of quantities and the contract, and linking them to day-to-day work is the best way to turn them from a formal obligation into a tool for controlling the site.

Checklist before signing

• Have you read all the technical and administrative sections, not just the price items?
• Do the work items described match those in the bill of quantities?
• Are the required materials and their characteristics clear?
• Have you identified the valuation and payment methods?
• Do site staff know the parts of the specifications that concern their work?

Spending a few hours on this check reduces disputes during the works and helps you prepare an estimate consistent with what is required.

F.A.Q. - Frequently asked questions

General information only, not legal advice: always check the current legislation.