VELUX vs RoofLITE+: Buying VELUX's Own Budget Brand (2026)

Here’s the open secret of the roof-window aisle: RoofLITE+ is made by Altaterra, part of the VELUX Group — the brand says so itself. So “VELUX vs RoofLITE+” is really VELUX competing with its own value line: 30–40% cheaper, matching entry-level thermal spec, 10-year guarantee — and a shorter list of everything else.

What you get for the smaller number

• Credible core spec. Double-glazed units at U-values around 1.3 W/m²K — matching equivalent VELUX glazing, per Sterlingbuild’s head-to-head. Pine, white-painted or moisture-resistant PVC finishes, made in Altaterra’s Hungarian factory.
• A real 10-year guarantee on all components — with one condition worth respecting: it applies when fitted with the official RoofLITE+ flashing kit. Budget the kit; it protects the roof and the paperwork.
• Group-backed manufacturing. This isn’t a mystery import — it’s the same corporate family as VELUX, which derisks the usual budget-brand fears about the company existing in ten years.
• A replacement-friendly detail: some RoofLITE+ flashings are designed to be compatible with VELUX configurations, which can simplify swapping an old VELUX without reworking the surround.

What the discount actually costs you

Range. RoofLITE+ covers the core: centre-pivot and top-hung in the common sizes (roughly the CK02-to-SK06 span of the size grid). The big statement sizes, the wide 134cm units and the exotic formats stay VELUX-only.

Powered options and accessories. No equivalent of the mature INTEGRA solar/electric line, and the blind range is basic — nor does RoofLITE+ enjoy the vast cheap compatible-blind market that VELUX codes get. Over a decade of ownership, blinds and accessories can quietly claw back the purchase saving.

The intangibles. Fitter familiarity, decades-deep spare parts, resale shorthand — the standard VELUX moats, all thinner here.

The verdict

RoofLITE+ answers one question extremely well: “where does saving money on the window cost me the least?” Garages, outbuildings, rentals, secondary rooms, budget builds — anywhere you want daylight, weather-tightness and a guarantee without paying for an ecosystem you’ll never use. It’s arguably the safest of the budget options precisely because of whose family it belongs to.

For main living spaces, powered windows, or rooms you’ll accessorise for years, the full-fat VELUX case still stands — and if you want a genuine third way, Keylite undercuts VELUX similarly while adding its own engineering tricks, and Fakro fights VELUX across the whole range. The complete alternatives roundup compares all of them; the cost guide has the numbers.