A specification can ask for both an Environmental Product Declaration and a Health Product Declaration for the same material. They are not duplicate paperwork. They answer different questions, and supplying one when the other is requested can leave a material submission incomplete.
Two questions, two documents
An EPD communicates life-cycle environmental information using a defined assessment framework. An HPD follows the HPD Open Standard for reporting product content and associated health information. HPD Collaborative explicitly distinguishes this disclosure from an LCA or EPD. See HPDC’s technical documentation.
Think of a review team asking two separate questions: what environmental impacts are associated with the product, and what do we know about the substances it contains? Neither document alone answers every question about sustainability, suitability or occupant exposure.
Where One Click LCA belongs
One Click LCA’s product tools can support product-LCA and EPD work, while its building tools support building assessments. HPD preparation is a separate disclosure workflow under the HPD Open Standard, commonly using the HPD Builder. Do not assume a One Click LCA report automatically generates an HPD or fulfils a material-ingredient requirement. HPDC explains its Builder here.
A simple procurement example
Consider two proposed floor finishes. One supplier provides an EPD but no HPD; another provides an HPD but no suitable environmental declaration. It would be misleading to call either submission complete without checking the project brief. Create separate environmental-impact and ingredient-disclosure columns in the submittal register, then record what is supplied and what remains outstanding.
Do not confuse disclosure with approval
The existence of either document is not a blanket guarantee that a product is environmentally superior or safe in every application. Review scope, completeness and suitability for the intended decision. A hazard disclosure is also not the same as a project-specific exposure or risk assessment. When the question needs toxicological judgement, involve an appropriately qualified specialist.
Keep the product identities aligned
Our recommended register includes manufacturer, exact product identifier, declared manufacturing coverage, document reference, issue information and the specified use. If the EPD describes a family while the HPD describes one variant, flag that mismatch. Retain the supplier’s written explanation instead of assuming that similar trade names imply identical formulations.
Use the project’s actual requirements
A certification team should identify the exact scheme version and documentation route before procurement. Avoid universal claims that any EPD or HPD earns a credit. Requirements depend on the route and on the document supplied. For DOE Modellers projects, the practical approach is to coordinate environmental calculations with a separate, clearly assigned material-health review rather than merge the two into a single carbon score.
Related guidance
- HPD Preparation for Manufacturers: An Ingredient Disclosure Checklist
- Comparing EPDs in One Click LCA: Avoiding Misleading Carbon Rankings
- EN 15978 life-cycle modules explained
Plan your LCA and EPD work
DOE Modellers supports building and product LCA using One Click LCA. Explore our LCA & EPD services or discuss the scope and evidence required for your project. HPD disclosure and independent verification are separate scopes to confirm.
Discuss your projectReviewed September 12, 2026. General technical guidance, not a certification or verification decision. Confirm current programme rules, standard editions and software entitlements for your project. DOE Modellers is not represented here as a programme operator or independent verifier.