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Quick expectation-setting, because search results blur this: VELUX Modular Skylights are a commercial building product — prefabricated glazing modules for offices, schools, shopping centres and hospitals, specified by architects and installed by contractors. If you’re a homeowner who searched “velux modular skylights” wanting a glass roof over the kitchen, the product you actually want is further down this page.
What the modular system is
Where ordinary roof windows are individual units, the modular system is engineered runs of glazing: factory-prefabricated modules on standardised dimensions (675–1,000mm wide, 600–3,000mm tall) that lock together into continuous rooflight configurations, per VELUX’s commercial documentation:
- Longlight — a continuous glazed strip along a roof (5–30° pitch), the classic office-corridor daylight solution; a wall-mounted variant handles 5–45°.
- Ridgelight — dual-pitched glazed ridges (25–40°, or 5° with support beams) crowning a roof with a spine of light.
- Northlight — sawtooth-style glazing (25–90°) for even, glare-free daylight in deep-plan buildings.
- Atrium — step and atrium formats assembling into full glass roofs over courtyards and central spaces.
The engineering points that sell it to specifiers: composite fibreglass-polyurethane frames (slim, stiff, insulating — no thermal bridging through timber), factory-fitted components for quality control and fast installation, optional motorised comfort-venting and smoke-venting modules that integrate with building management systems, integrated blinds, and a 10-year guarantee on modules and flashings.
Why homeowners can’t really buy it
It’s sold through commercial project channels with design support, structural calculations and contractor installation — there’s no “add to basket”, and the module economics only make sense across the long runs large buildings need. VELUX itself routes residential visitors to the domestic range.
What to buy instead, by ambition
- “I want a normal skylight.” → A roof window for a pitched roof, chosen with our buyer’s guide; from ~£650 fitted per the cost guide.
- “I want a wall of roof glass.” → A combi installation: standard roof windows ganged side by side, or sloping units stacked over vertical fixed panes. Catalogue products, standard flashing kits, panoramic effect — the domestic answer to a longlight.
- “I have a flat roof.” → Flat-roof skylights or a lantern, depending on whether you want flush glass or architectural height.
- “I want one huge uninterrupted pane.” → That’s bespoke structural glazing, with the budget to match — read that page before falling in love.
The one genuinely useful takeaway from the commercial system for home projects: prefabrication and standard sizes are why costs stay sane. The closer your design stays to catalogue modules — in any product family — the more roof glass you get per pound.
Frequently asked questions
What are VELUX Modular Skylights?
A prefabricated commercial roof-glazing system: factory-built glass modules (675–1,000mm wide, up to 3m tall) that combine into long rooflight runs, ridgelights and atria for offices, schools, retail and healthcare buildings. It's specified by architects, not bought off the shelf.
Can I use VELUX Modular Skylights in my house?
In practice, no — it's a commercial specifier product sold through project channels. For homes, the equivalents are standard roof windows for pitched roofs, flat-roof skylights, or combi arrangements of multiple roof windows for a glass-roof effect.
What's the difference between modular skylights and normal VELUX windows?
Scale and market. Roof windows are individual openable windows for houses; modular skylights are engineered runs of structural glazing for large buildings, with composite frames, motorised venting options and project-level design support.
How do I get a glass-roof look in a normal house?
Combi installations: two or three standard roof windows side by side or stacked sloping-to-vertical. You get the panoramic glazing effect with catalogue products, standard flashings and normal installer skills — at a fraction of bespoke structural glazing costs.
Keep reading
VELUX costs 15–40% more than rival roof windows. Here's what the premium actually buys, when it's worth paying, and when a cheaper brand makes more sense.
Fakro, Keylite, RoofLITE+, Roto and Dakea compared against VELUX on 2026 prices, guarantees and quality — and which alternative fits which job.
Every custom skylight option for UK homes — flat glass, lanterns, walk-on and structural glazing — with 2026 costs, materials advice and the regs.