Glass Rooflight (Glasovenlys) - 2/3-layer

Declaration details

Manufacturer

VELUX

Program operator

Smart EPD

Declaration number

SmartEPD-2026-077-1119-01

Date of issue

October 22, 2026

Valid until

October 22, 2031

Product category rules (PCR)

IBU PCR Part B: Requirements on the EPD for Windows and Doors v1.0/1.7/1.4

Standard

ISO 14025:2006 and EN 15804:2012+A2:2019/AC:2021

Declared unit

1 m2 of product of a window ≤ 2.3 m² (reference dimensions according to EN 17213: 1.23 m × 1.48 m)

System boundary

Cradle to gate with other options (A1 - A3, A4, A5, C1 - C4, D)

Product specificity

Product Specific

Manufacturing specificity

Facility Specific

Manufacturing plant

Østbirk (Østvej 2, Ostbirk, Denmark)

Product category

Openings › TranslucentWallAndRoofAssemblies

Product SKU

Glass Rooflight (Glasovenlys) – 3-layer (Reference) 56.4 kg/m2 Glass Rooflight (Glasovenlys) – 2-layer 39.2 kg/m2

Verifier

Rifat Karim, Independent Consultant

LCA software

SimaPro 10.2

Program instructions

Smart EPD General Program Instructions v.2.0, March 2025

Life cycle assessment results

Results per 1 m2 of product of a window ≤ 2.3 m² (reference dimensions according to EN 17213: 1.23 m × 1.48 m).

Environmental Impact Assessment Results

Resource Use Indicators

Waste and Output Flow Indicators

Carbon Emissions and Removals

ND = not declared. Life cycle modules: A1-A3 product stage, A4-A5 construction process, B use stage, C end of life, D benefits and loads beyond the system boundary.

Material composition

Hazardous substances

No regulated hazardous or dangerous substances are included in this product.

Scenarios

Transport to the building site (A4)

Fuel type

Diesel

Vehicle type

Truck and Trailer

Transport distance

350 km

Capacity utilization

33%

Weight of products transported

57 kg

Packaging mass

0.5984 kg

End of life (C1-C4)

Collected separately

56.4 kg

Recycling

19.54 kg

Landfill

36.35 kg

Incineration

0.5101 kg

Benefits and loads beyond the system boundary (D)

Recycling rate of product

34.64%

Recycled content of product

21.95%

Net energy benefit from energy recovery in C3, declared as exported energy

5.94 MJ

Product description

A versatile, cost-effective flat glass rooflight for public, administrative, and industrial buildings, installed at 5 to15° pitch. Set in an aluminium frame with welded corner joints, it offers 2- or 3-layer insulated energy glazing for high insulation performance per EN1873, along with excellent daylight transmission and sound insulation. Available as fixed, comfort-ventilated, or configured for smoke exhaust and fire ventilation per DS/EN12101-2, with dual-purpose certification allowing daily comfort ventilation alongside fire safety use. This EPD represents glass skylights with either double- or triple-layer energy glazing. Results for all variations are reported using the most conservative variant (Glass Rooflight (Glasovenlys) - 3-layer) as the reference. This EPD represents only the Rooflight. See separate EPD for Upstands.

Interpretation

The manufacturing of the products in this analysis involves the direct procurement of raw materials from suppliers. These materials are then transported to manufacturing facilities in the EU where they are stored, processed, and combined to produce finished products. Notably, the product stage (stage 1) has the highest impact contribution, mainly attributed to the environmental impacts of raw material manufacturing.

Given that the raw materials used in product manufacturing have a significant impact, exploration of opportunities to substitute these materials with alternatives that have a lower environmental impact. Additionally, consideration should be given to collaborating with suppliers who employ sustainable manufacturing techniques or integrate more renewable energy into their production processes. Such initiatives can lead to more environmentally friendly products and further enhance the sustainability of the products in this analysis.