What VELUX window types are available in Ireland?

The most common VELUX types available include the GGL (centre-pivot, standard residential), GGU (centre-pivot with moisture-resistant coating for bathrooms and kitchens), GPL (top-hung for maximum headroom), GFL (roof access/attic hatch), INTEGRA (electric with rain sensor), and CABRIO (converts to a mini-balcony). For most Dublin homes, the GGL centre-pivot is the standard choice.

VELUX Roof Windows Dublin: Installation, Costs & What to Expect in 2025

Q: Do I need planning permission for a VELUX window in Dublin?

In most cases, replacing an existing rooflight or adding VELUX windows to a roof slope that doesn't face a public road is exempt from planning permission in Ireland under Class 2 exemptions. However, exemptions don't apply in all situations — conservation areas, protected structures, and some extension scenarios require a planning check. It's always worth confirming with Dublin City Council or your local authority before installation.

If you're thinking about adding a VELUX roof window to your Dublin home, you're in good company. Skylights and roof windows are one of the most-requested upgrades we install — and for good reason. A well-positioned VELUX window can flood a dark bedroom, attic conversion, or landing with natural light, improve ventilation, and meaningfully add to your home's resale value.

In this guide, we cover everything Dublin homeowners need to know before booking an installation — window types, realistic costs for 2025, how to spot a certified installer, and exactly what to expect from start to finish.

What is a VELUX Roof Window?

VELUX roof windows are purpose-built rooflights designed to sit flush within your existing roof slope — not to be confused with flat glass rooflights or dormers. They hinge open from inside the room, provide both light and ventilation, and are designed to integrate with standard Irish roof tile and slate profiles without significant structural change.

VELUX is the world's leading manufacturer of roof windows, and their products are engineered specifically for the Irish and UK climate — Atlantic-facing, high-rainfall conditions where airtight flashing is critical. For Dublin homeowners with Victorian terraces, 1930s semis, or attic conversions, VELUX windows are the most common and practical choice for bringing light into previously dark upper floors.

How Much Does VELUX Installation Cost in Dublin in 2025?

Costs vary, but as a practical guide for 2025:

Typical Cost Range

€900 – €1,500 for a single VELUX window, fully fitted with lead or EDW flashing in Dublin. This covers supply, installation, and standard internal reveal making-good.

What affects the final price:

Window size and model — the GGL 78×118cm (M08) is the most popular size; larger or triple-glazed models add cost
Number of windows — installing two or more windows on the same day reduces the per-window cost significantly
Roof type and access — a natural slate roof or a complex pitch needs more care than modern concrete tiles
Flashing type — lead flashing vs. VELUX's EDW collar affects both durability and price; we recommend lead for older roofs
Internal finishing — whether the window reveal needs plastering, dry-lining, or an internal window kit

We always visit first, assess the roof and the proposed position, and provide a free written quote before any decision is made. Zero call-out fees, no obligation.

VELUX Certified Installer — Why It Matters

Not every roofer is qualified to install VELUX windows correctly. The most common cause of leaks around roof windows isn't the window itself — it's incorrect flashing. A poorly bedded collar, wrong overlap, or non-VELUX flashing kit can allow water ingress that isn't immediately visible but causes internal damage over months or years.

VELUX's certification programme trains contractors to install and flash their products to manufacturer specification. Choosing a VELUX Certified Installer means:

Your window retains its full manufacturer guarantee
Flashing is installed to VELUX's documented specification
You have a verified installation record for warranty and resale purposes

Hi Performance Roofing is a VELUX Certified Installer serving Dublin, Meath and Wicklow since 1992. Always ask to see certification — if a roofer can't confirm it, they're not certified.

VELUX Window Types Available in Ireland

The right window depends on your room, roof pitch, and how you'll use it. Here are the main types available:

GGL — Centre-Pivot

The standard residential choice. Tilts from the centre for easy cleaning from inside. Best for bedrooms, attic rooms, and landings.

GGU — Centre-Pivot (PU)

Same opening as GGL but with a moisture-resistant polyurethane coating. The correct choice for bathrooms, kitchens, and damp environments.

GPL — Top-Hung

Opens outward from the top hinge. Creates maximum unobstructed headroom below — ideal for lower-pitched roofs or above furniture.

INTEGRA — Electric

Automated opening via remote, app, or built-in rain sensor. Compatible with VELUX ACTIVE smart home system. Best for hard-to-reach roof positions.

GFL — Roof Access

Opens as a standard window but also functions as an access hatch for roof maintenance. Useful for flat sections or plant room access.

CABRIO — Balcony

Converts into a mini-balcony when fully opened. For attic bedrooms on pitches of 35° or more. Premium option for top-floor living.

For most Dublin homes — a bedroom skylight, attic conversion, or bathroom ventilation — the GGL centre-pivot is the practical, cost-effective choice. We'll always recommend the right model for your specific roof pitch and room use.

What Happens During Installation: Step by Step

Free Site Visit & Written Quote

We visit your property, assess the roof pitch and internal ceiling height, identify the best window position, and provide a detailed written quote. No cost, no obligation.

Strip Back the Surrounding Slates or Tiles

On installation day, we carefully lift and remove the tiles or slates around the opening area. On a slate roof, each slate is lifted and stored for re-bedding.

Cut the Opening & Fit the VELUX Frame

The roof deck is cut to the correct VELUX dimensions, trimmers are fitted between rafters, and the VELUX timber frame is installed and secured to the roof structure.

Install the Flashing Collar

This is the most technically critical step. Lead flashing or the VELUX EDW collar is fitted around the entire window perimeter, correctly lapped under and over surrounding tiles to channel all water away from the opening.

Re-bed Tiles & Finish Internally

Surrounding tiles or slates are relaid, the window sash is hung, and the internal reveal is made good to your specification. Site is left clean and clear.

4 Signs Your Home is Ready for a VELUX Window

Your attic conversion feels dark — even a well-converted north-facing attic without a roof window can feel oppressive year-round
Your bathroom has condensation problems — a GGU with a trickle vent dramatically reduces moisture build-up and prevents mould
You have an old single-pane rooflight — replacing it with a modern triple-glazed VELUX measurably reduces heat loss and eliminates condensation on the glass
You're planning a renovation — adding a VELUX during a general reroof or attic conversion is significantly cheaper than a standalone return visit later

Frequently Asked Questions

How much does VELUX window installation cost in Dublin?

A single VELUX roof window — supply, installation and lead or EDW flashing — typically costs €900 to €1,500 fitted in Dublin. The exact price depends on window size and model, roof type and access, internal finishing, and whether multiple windows are being installed on the same day. We provide free, written quotes with no call-out fee before any work begins.

What is a VELUX Certified Installer?

A VELUX Certified Installer is a roofer who has completed VELUX's official training programme and is accredited to install and flash VELUX windows to manufacturer specification. This matters because incorrect flashing is the leading cause of leaks around roof windows. Certification ensures the full product warranty is honoured and the installation is documented. Hi Performance Roofing is a VELUX Certified Installer operating across Dublin, Meath and Wicklow.

How long does VELUX installation take?

A single VELUX window on an accessible roof typically takes half a day to a full day. Two or three windows in the same roof slope usually take one to two days. Attic conversions with multiple windows and internal finishing should allow two to three days. We'll confirm the timeline in your written quote.

Do I need planning permission for a VELUX window in Dublin?

In most cases, adding VELUX windows to a roof slope that doesn't face a public road is exempt from planning permission under Class 2 exemptions in Ireland. However, exemptions don't apply in all situations — conservation areas, protected structures, and some extension scenarios require a planning check first. We recommend confirming with Dublin City Council or your local authority before installation. We're happy to advise based on the specific property.

What VELUX window is best for an attic conversion?

For most Dublin attic conversions, the GGL centre-pivot in a larger size (M08 78×118cm or FK08 66×140cm) is the standard choice — good light output, easy internal cleaning, and cost-effective. If you're converting a bathroom within the attic, use the GGU instead with its moisture-resistant coating. We'll recommend the correct size and model for your specific room layout and roof pitch during the free site visit.