Environmental Product Declaration

Structural Glazing (Xtralite) - XLS

Environmental Product Declaration (EPD) for Structural Glazing (Xtralite) - XLS, manufactured by VELUX. Declaration SmartEPD-2026-077-0902-01, prepared according to IBU Part B: Requirements on the EPD for Windows and Doors, valid until June 5, 2031.

Download the EPD (PDF)

Declared unit: 1 m2 of product of a window ≤ 2,3 m² (reference dimensions according to EN 17213: 1,23 m × 1,48 m)
Valid until: June 5, 2031
PCR: Windows and Doors

Declaration details

Manufacturer: VELUX
Program operator: Smart EPD
Declaration number: SmartEPD-2026-077-0902-01
Date of issue: June 5, 2026
Valid until: June 5, 2031
Product category rules (PCR): IBU Part B: Requirements on the EPD for Windows and Doors (version 1.0/1.7/1.4)
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: VELUX, Northumberland, UK (Blyth Riverside Business Park, Spencer Road, Blyth, Northumberland NE24 5TG, UK)
Product category: Openings › TranslucentWallAndRoofAssemblies
Product SKU: XLS
Product service life: 30 years
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

Indicator	Unit	A1-A3	A4	A5	C2	C3	C4	D
GWP-total	kg CO2 eq	4.15e+2	3.29e+0	1.47e+1	1.94e-1	9.96e+0	4.65e-3	-2.22e+0
GWP-biogenic	kg CO2 eq	1.12e+0	2.62e-3	7.57e-1	1.54e-4	7.83e-4	1.04e-6	-4.93e-4
GWP-fossil	kg CO2 eq	4.12e+2	3.28e+0	1.39e+1	1.94e-1	9.96e+0	4.65e-3	-2.22e+0
GWP-luluc	kg CO2 eq	1.08e+0	1.60e-3	3.25e-2	9.44e-5	8.13e-5	5.53e-7	-1.81e-4
ODP	kg CFC11 eq	1.03e-5	7.46e-8	3.15e-7	4.39e-9	1.05e-8	7.00e-11	-1.01e-7
AP	mol H+ eq	2.45e+0	8.13e-3	7.43e-2	4.79e-4	2.32e-3	4.20e-5	-1.51e-3
EP-freshwater	kg P eq	1.35e-1	2.42e-4	4.06e-3	1.43e-5	3.11e-5	2.36e-7	-3.44e-5
EP-marine	kg N eq	4.45e-1	2.21e-3	1.37e-2	1.31e-4	1.31e-3	1.89e-5	-5.69e-4
EP-terrestrial	mol N eq	4.49e+0	2.27e-2	1.38e-1	1.34e-3	1.13e-2	2.05e-4	-6.16e-3
POCP	kg NMVOC eq	1.43e+0	1.33e-2	4.39e-2	7.82e-4	2.85e-3	6.17e-5	-3.98e-3
ADP-minerals&metals	kg Sb eq	1.87e-3	9.18e-6	5.64e-5	5.41e-7	5.04e-7	1.67e-9	-5.59e-7
ADP-fossil	MJ	4.96e+3	4.98e+1	1.51e+2	2.94e+0	2.01e+0	5.96e-2	-3.34e+1
WDP	m3 depriv.	6.45e+1	2.38e-1	2.02e+0	1.40e-2	4.46e-1	1.33e-4	-3.33e-2

Resource Use Indicators

Indicator	Unit	A1-A3	A4	A5	C2	C3	C4	D
PERE	MJ	6.14e+2	7.29e-1	1.85e+1	4.30e-2	7.85e-2	4.92e-4	-1.15e-1
PERM	MJ	6.38e+0	0	1.91e-1	0	0	0	0
PERT	MJ	6.21e+2	7.29e-1	1.87e+1	4.30e-2	7.85e-2	4.92e-4	-1.15e-1
PENRE	MJ	4.96e+3	4.98e+1	1.51e+2	2.94e+0	2.01e+0	5.96e-2	-3.34e+1
PENRM	MJ	1.61e+0	2.10e-3	4.85e-2	1.24e-4	8.74e-5	6.98e-7	-3.97e-4
PENRT	MJ	4.96e+3	4.98e+1	1.51e+2	2.94e+0	2.01e+0	5.96e-2	-3.34e+1
SM	kg	9.49e+0	0	2.85e-1	0	0	0	0
RSF	MJ	0	0	0	0	0	0	0
NRSF	MJ	0	0	0	0	0	0	0
FW	m3	2.64e+0	6.75e-3	8.20e-2	3.98e-4	1.41e-2	3.19e-6	-2.54e-3

Waste and Output Flow Indicators

Indicator	Unit	A1-A3	A4	A5	C2	C3	C4	D
HWD	kg	0	0	0	0	0	0	0
NHWD	kg	1.07e-1	0	1.68e-1	0	0	1.63e+0	0
RWD	kg	8.44e-3	1.52e-5	2.54e-4	8.95e-7	9.83e-7	7.01e-9	-2.26e-6
CRU	kg	0	0	0	0	0	0	0
MFR	kg	1.96e+0	0	5.07e+0	0	2.09e+1	0	0
MER	kg	5.41e-1	0	1.08e+0	0	4.83e+0	0	0
EE	MJ	6.67e+0	0	1.26e+1	0	6.32e+1	0	0

Carbon Emissions and Removals

Indicator	Unit	A1-A3	A5
Bio Carbon Removal from Product	kg CO2	0	0
Bio Carbon Emission from Product	kg CO2	0	0
Bio Carbon Removal from Packaging	kg CO2	-1.06e+1	0
Bio Carbon Emission from Packaging	kg CO2	2.62e+0	8.00e+0
Bio Carbon Emission from Waste during Manufacturing (renewable source)	kg CO2	0	0
Calcination Carbon Removal	kg CO2	0	0
Carbonation Carbon Emission	kg CO2	0	0
Carbon Emission from Waste during Manufacturing (non-renewable source)	kg CO2	0	0

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

Product composition
Material/Component Category	Origin	% Mass
Glazing	UK	7.05
Profile support	UK	78.6
Rivet	UK	0.370
Screws and nuts	UK	0.660
Sealing	UK	2.78
Small parts	UK	1.46
Upstand	UK	9.14

Packaging
Packaging material	Origin	Mass (kg)
Cardboard		4.82
Pallet		0.03
Plastic cover		0.58

Biogenic carbon
Biogenic carbon content	kg C per m2
Biogenic carbon content in product	0
Biogenic carbon content in accompanying packaging	2.18

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: 1000 km
Capacity utilization: 33%
Weight of products transported: 32.8 kg
Packaging mass: 5.43 kg

End of life (C1-C4)

Collected with mixed construction waste: 27.4 kg
Recycling: 20.9 kg
Landfill: 1.63 kg
Incineration: 4.83 kg

Benefits and loads beyond the system boundary (D)

Recycling rate of product: 0.764%

Product description

Continuous polycarbonate rooflights provide a robust and flexible daylighting solution ideal for large-scale industrial structures, including warehouses, logistics centres, and production facilities. Capable of spanning widths up to 11 metres, these systems feature curved panels that form continuous barrel vaults, maximizing the intake of diffused natural light to create optimal indoor working conditions. Suitable for both flat and pitched roofs, they are built to withstand extreme weather while offering high thermal efficiency and a self-cleaning effect for low maintenance. These versatile units can be fully customized to enhance the building environment, integrating options for comfort aeration, natural smoke and heat exhaust ventilation (NSHEV), and fall-through protection to ensure both safety and compliance.

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 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 combined environmental impacts associated with raw material manufacturing and energy used in manufacturing the products. For products with significant manufacturing energy impacts, the shift to renewable energy sources is recommended. 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.

LCIA results are relative expressions and do not predict impacts on category endpoints, the exceeding of thresholds, safety margins or risks. EPDs are comparable only when they follow the same PCR, functional unit and system boundary. The full EPD (PDF) contains the methodology, scenario assumptions and verification statement.