Hilti Drywall Screws: Environmental Product Declaration (EPD)

EPD Hub, HUB-1987

Published: 06.10.2024, Valid until: 06.10.2029

About This Document

This Environmental Product Declaration (EPD) provides a comprehensive assessment of the environmental impacts associated with Hilti Drywall Screws. It is prepared in accordance with the EN 15804+A2 and ISO 14025 standards, following the EPD Hub PCR version 1.1. The document details the product's lifecycle, from raw material acquisition through manufacturing, transport, installation, and end-of-life stages.

Product Overview

The Hilti Drywall Screw portfolio encompasses a variety of screws designed for fastening boards to wood or metal substructures. These include stitch tip and drill-tip screws, available with different corrosion protection finishes such as black phosphate, galvanic zinc-plated, and electro-coated (CRC) carbon steel. The primary product referenced is the 6x1-1/4" PBH S drywall screw.

Manufacturer: Hilti AG

Headquarters: Schaan, Liechtenstein

Website: www.hilti.group

Life Cycle Assessment (LCA)

The LCA study covers the following life cycle modules:

Product Stage: Raw materials (A1), Transport (A2), Manufacturing (A3)
Construction Process Stage: Transport to site (A4), Installation (A5)
Use Stage: Not accounted for in this EPD.
End of Life Stage: Deconstruction/demolition (C1), Transport to waste processing (C2), Waste processing (C3), Disposal (C4)
Benefits and Loads: Module D (Recycling and recovery)

The manufacturing process involves stages such as coil input, heading, pinch pointing, thread rolling, heat treatment, surface treatment, and packaging. Transportation is calculated based on lorry/ship shipments. The end-of-life assessment considers dismantling, waste collection, and recycling processes, with a stated recycling rate of 85% based on world average.

Environmental Data Summary

Key environmental indicators are presented, including:

Global Warming Potential (GWP): Total GWP-fossil for A1-A3 is 2.74E+00 kg CO2e.
Total Energy Use (A1-A3): 9.27 kWh.
Net Freshwater Use (A1-A3): 0.02 m³.
Secondary Material Inputs: 11.7%
Secondary Material Outputs: 66.7%

Detailed environmental impact data across various categories and life cycle stages are provided in extensive tables within the full document.

Substances and Verification

The product does not contain any REACH Substances of Very High Concern (SVHC) above 0.1% (1000 ppm). The EPD has undergone independent third-party verification, confirming compliance with ISO 14025 and relevant standards. The verifier, Imane Uald Lamkaddam, confirmed no relevant deviations were found.

Product Portfolio

An extensive appendix lists the specific drywall screw models and their item numbers included within the scope of this EPD, along with their respective weights.

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