Contracts and design
Renovation specification: what it should contain before contract
A useful specification turns phrases such as premium finish into identifiable materials, performance, installation methods, samples and inspections.
This guide helps organise questions, records and checks. It does not replace project-specific diagnosis, design, site supervision or legal advice.
What to check
Document hierarchy
The contract should state how differences between drawings, bill, specification and offer are resolved.
Testable performance
Products and systems need requirements for substrate, installation and tolerance.
Samples and approvals
Format, location, timing and approver keep aesthetic choices from stopping construction.
Handover and maintenance
Data, certificates, spares, cleaning and instructions belong in completion requirements.
Evidence and records to retain
- contract-document register
- system and material data
- sample and mock-up schedule
- testing and inspection plan
- handover-document list
Records should identify date, location, revision and responsible party. Photographs or figures without context cannot reconstruct a decision or compare it with design, contract and actual condition.
The warning sign
Copying a specification from another building can introduce incompatible products, obsolete references or performance never coordinated with the design.
A practical sequence
- Record the condition without concealing uncertain areas.
- Define performance, responsibility and acceptance criteria.
- Compare alternatives, quantities, cost and programme effect.
- Approve the solution and update documents before execution.
- Inspect while the work remains visible and close non-conformities.
Frequently asked questions
Is it needed with a lump-sum contract?
Yes. A lump sum does not automatically define quality or scope boundaries.
Should a brand be named?
Any selection should have a reason, required performance and rules for proposed equivalents.
Who approves samples?
The process should identify roles, deadlines and consequences of late decisions.
Conclusion
The specification protects quality and comparison when it aligns with drawings, quantities and the approval process.
The existing call to action on this page can be used to contact MANINI Restorations about project-management method. Any property-specific advice requires surveys and records.
Primary sources consulted
- D.P.R. 380/2001 — Testo unico dell’edilizia, accessed 4 September 2026.
- D.Lgs. 36/2023 — Codice dei contratti, accessed 4 September 2026.
Frequently Asked Questions
Is it needed with a lump-sum contract?
Yes. A lump sum does not automatically define quality or scope boundaries.
Should a brand be named?
Any selection should have a reason, required performance and rules for proposed equivalents.
Who approves samples?
The process should identify roles, deadlines and consequences of late decisions.
