Environmental Product Declaration

X-Dome / X-Pyramid Rooflight X3

Environmental Product Declaration (EPD) for X-Dome / X-Pyramid Rooflight X3, manufactured by VELUX. Declaration SmartEPD-2026-077-0898-01, 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-2026-077-0898-01
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: X-Dome / X-Pyramid Rooflight X3
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	1.21e+2	2.91e+0	6.51e+0	3.01e-1	3.78e+1	1.12e-2	-2.76e+1
GWP-biogenic	kg CO2 eq	-9.78e-1	2.32e-3	6.11e-1	2.39e-4	2.91e-3	2.52e-6	1.42e-1
GWP-fossil	kg CO2 eq	1.21e+2	2.91e+0	5.90e+0	3.00e-1	3.78e+1	1.12e-2	-2.78e+1
GWP-luluc	kg CO2 eq	1.88e-1	1.42e-3	5.71e-3	1.46e-4	2.86e-4	1.34e-6	-6.45e-3
ODP	kg CFC11 eq	1.49e-5	6.60e-8	4.53e-7	6.82e-9	3.89e-8	1.69e-10	-3.87e-6
AP	mol H+ eq	5.48e-1	7.19e-3	1.74e-2	7.43e-4	8.62e-3	1.02e-4	-4.10e-2
EP-freshwater	kg P eq	3.50e-2	2.15e-4	1.07e-3	2.22e-5	1.13e-4	5.71e-7	-1.86e-3
EP-marine	kg N eq	1.16e-1	1.96e-3	3.91e-3	2.02e-4	4.92e-3	4.56e-5	-9.89e-3
EP-terrestrial	mol N eq	1.12e+0	2.01e-2	3.74e-2	2.08e-3	4.20e-2	4.95e-4	-1.12e-1
POCP	kg NMVOC eq	4.86e-1	1.17e-2	1.58e-2	1.21e-3	1.06e-2	1.49e-4	-5.81e-2
ADP-minerals&metals	kg Sb eq	1.01e-3	8.13e-6	3.08e-5	8.40e-7	1.82e-6	4.03e-9	-5.83e-5
ADP-fossil	MJ	2.63e+3	4.41e+1	8.12e+1	4.56e+0	6.97e+0	1.44e-1	-4.66e+2
WDP	m3 depriv.	5.29e+1	2.11e-1	1.71e+0	2.18e-2	1.72e+0	3.21e-4	5.99e-1

Resource Use Indicators

Indicator	Unit	A1-A3	A4	A5	C2	C3	C4	D
PERE	MJ	1.92e+2	6.45e-1	5.80e+0	6.66e-2	2.86e-1	1.19e-3	-4.09e+0
PERM	MJ	5.47e+0	0	1.64e-1	0	0	0	0
PERT	MJ	1.97e+2	6.45e-1	5.96e+0	6.66e-2	2.86e-1	1.19e-3	-4.09e+0
PENRE	MJ	2.63e+3	4.41e+1	8.12e+1	4.56e+0	6.97e+0	1.44e-1	-4.66e+2
PENRM	MJ	9.85e-1	1.86e-3	2.97e-2	1.92e-4	3.07e-4	1.69e-6	5.56e-4
PENRT	MJ	2.63e+3	4.41e+1	8.12e+1	4.56e+0	6.97e+0	1.44e-1	-4.66e+2
SM	kg	4.41e-3	0	1.32e-4	0	0	0	0
RSF	MJ	0	0	0	0	0	0	0
NRSF	MJ	0	0	0	0	0	0	0
FW	m3	1.39e+0	5.98e-3	4.54e-2	6.17e-4	5.42e-2	7.72e-6	3.08e-2

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	9.14e-2	0	2.23e-1	0	0	3.93e+0	0
RWD	kg	3.62e-3	1.34e-5	1.09e-4	1.39e-6	3.54e-6	1.70e-8	-4.54e-5
CRU	kg	0	0	0	0	0	0	0
MFR	kg	1.12e+0	0	4.05e+0	0	4.39e+0	0	0
MER	kg	4.79e-1	0	1.31e+0	0	1.59e+1	0	0
EE	MJ	6.31e+0	0	1.67e+1	0	2.40e+2	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	-9.10e+0	0
Bio Carbon Emission from Packaging	kg CO2	2.01e+0	7.08e+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
Base for cover caps	UK	0.04
Cover caps for screws	UK	0.04
Glazing	UK	64.2
Grommets	UK	8.59
Profile support	UK	20.3
Screw caps	UK	0.12
Screws and nuts	UK	1.82
Sealing	UK	2.44
Upstand	UK	2.44

Packaging
Packaging material	Origin	Mass (kg)
Cardboard		4.27
Pallet		0.020
Plastic cover		0.510

Biogenic carbon
Biogenic carbon content	kg C per m2
Biogenic carbon content in product	0
Biogenic carbon content in accompanying packaging	1.93

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: 29.0 kg
Packaging mass: 4.80 kg

End of life (C1-C4)

Collected with mixed construction waste: 24.2 kg
Recycling: 4.39 kg
Landfill: 3.93 kg
Incineration: 15.9 kg

Benefits and loads beyond the system boundary (D)

Recycling rate of product: 0.181%

Product description

Modular Domes and Pyramids are versatile single-unit rooflights designed to deliver optimal daylight and comfort ventilation across a wide range of commercial applications. Engineered for maximum design flexibility, they are available in an extensive selection of shapes and profiles, ranging from standard dimensions to bespoke sizes between 600mm and 2400mm, to meet specific architectural requirements. These prefabricated units feature interchangeable kerbs that facilitate fast, simple installation on low-pitch roofs (up to 15°) and are fully compatible with all major flat roof coverings, including EPDM, PVC, bitumen, and GRP

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.