Keylite Roof Windows and EPDs: a snapshot
Keylite Roof Windows (keylite.co) is a focused daylighting brand with a broad lineup for pitched and flat roofs. If you sell into projects that ask for product‑specific EPDs, coverage matters. Here’s how Keylite’s range stacks up today, where the gaps likely are, and which competitors already show up with declarations in hand.
Who Keylite is, in one minute
Keylite is the roof‑window arm of the Keystone Group, serving residential and light‑commercial projects across the UK, Ireland and beyond. They specialise in roof daylighting and adjacent install pieces rather than general fenestration.
What they sell
The portfolio spans centre‑pivot and top‑hung roof windows, conservation styles, integrated‑blind variants, flat‑roof solutions and domes, sun‑tube systems, loft ladders, flashings, blinds and small accessories. That puts them in the roof daylighting “systems” camp rather than a single‑SKU niche, with total SKUs likely in the hundreds given size, finish, glazing and operation choices (Keylite product range, 2025). (Keylite, 2025)
EPD coverage, as of December 18, 2025
We could not locate product‑specific EPDs published by Keylite for its roof windows, flat‑roof units, sun tubes or loft ladders. Their certificates pages highlight FSC timber, BBA approvals and ISO 9001, but no EPD listings, which aligns with what specifiers report seeing in day‑to‑day tender packs.
Why that gap matters commercially
On many projects, teams default to conservative carbon factors when a product lacks a verified EPD. That can make a comparable unit with a product‑specific EPD easier to prefer without touching price. With LEED v5 on the horizon and client policies tightening, a missing EPD risks fewer shortlists, fewer pre‑approved libraries, and more substitutions late in design.
Competitors Keylite meets most often
In pitched and flat‑roof daylighting, the recurring cast is VELUX, FAKRO and Roto. Each publicly communicates EPD availability for key roof‑window lines. See VELUX’s EPD page for roof windows and flat‑roof units, and Roto’s note on ift Rosenheim‑verified EPDs. (VELUX EPDs) (Roto, 2025)
A likely best‑seller missing an EPD
Centre‑pivot roof windows are core volume for this category. FAKRO publishes EPDs covering wooden roof windows and other lines, which means a like‑for‑like alternative with a declaration is easy to cite by architects in spec notes (FAKRO, 2023). (FAKRO EPD declarations, 2023) If Keylite’s centre‑pivot SKUs dont have EPDs, they face an avoidable disadvantage on projects that prefer or require them.
Flat‑roof windows and domes
Flat‑roof glazing is another busy lane. VELUX lists EPDs across multiple flat‑roof configurations on its compliance page. That gives carbon‑accounting headroom for education, healthcare and office interiors where daylight is prized but embodied targets still bite.
Sustainability posture at group level
Keystone Group communicates measurable sustainability investments like PV capacity increases and group‑wide waste reduction. Those signals are useful, yet project teams still need product‑specific, third‑party verified EPDs to claim credits or meet internal procurement rules (Keystone Group, 2025). (Keystone Group Sustainability, 2025)
What it would take to close the gap
For most of Keylite’s range, an EN 15804‑compliant EPD under a windows and doors PCR is the straightforward route. Start with the highest‑velocity SKUs, typically centre‑pivot and flat‑roof units, then roll to accessories with material mass. Choose a program operator aligned to your core markets to speed acceptance in submittals. The heavy lift is data wrangling across bill of materials, energy, packaging and scrap. A strong LCA partner should take that off the product and ops teams’ plate so timelines stay sane.
Market takeaway
Keylite brings breadth in roof daylighting and installation accessories. Today, competitors like VELUX, FAKRO and Roto meet the spec with published EPDs in the same application slots, which quietly tilts decisions their way. Closing that single paperwork gap would let Keylite compete on performance and availability without being penalised by default carbon math.
Frequently Asked Questions
Does Keylite currently publish product-specific EPDs for its roof windows or flat-roof units?
We found no product-specific EPDs listed by Keylite for these categories. Competitors in the same segments publicly provide EPDs, which can influence specification on projects that require them.
Roughly how many product categories does Keylite serve and how many SKUs?
They operate across multiple daylighting categories including pitched windows, flat-roof units, sun tubes, loft ladders, blinds and flashings, with total SKUs likely in the hundreds due to sizes and options (Keylite product range, 2025).
Which competitors most often appear on the same specs?
VELUX, FAKRO and Roto are the recurring alternatives in pitched and flat-roof daylighting. Each communicates EPD coverage for key lines.
Where should EPDs start to unlock the most bids?
Begin with centre‑pivot roof windows and core flat‑roof units. Those models see the highest volume and are most often compared like‑for‑like against declared competitors.
About the Author
Eric works at the intersection of sustainability, regulation, and business strategy, helping manufacturers navigate the evolving landscape of EPDs and LCAs. Having spoken with hundreds of teams across North America, brings a deep understanding of what drives ROI, what regulators are asking for, and how companies can stay ahead with smart, scalable approaches to environmental reporting.
