
Velux GPL - Dual Action Roof Window
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VELUX GPL is an openable, dual action roof window designed for in-reach applications and developed for use in attics and lofts to maximise roof top views and ventilation.
Product Features:
- Opens in two ways: the bottom handle allows for top-hung opening; while a short pull on the top control bar operates the filtered vent flap for passive ventilation even while the window is shut. A longer pull allows the sash to rotate 180° for ease of cleaning the outer pane from inside the room.
- White pre-painted pine sash and frame
- Complete with outer aluminium cappings and flashings for tile or corrugated iron roofs.
- Available in 5 sizes
- Laminated double glazing as standard
- Insect screen available as extra
Available Sizes
| Size Code | Width (mm) | Height (mm) |
|---|---|---|
| CK04 | 550 | 980 |
| MK04 | 780 | 980 |
| MK06 | 780 | 1180 |
| MK08 | 780 | 1400 |
| SK06 | 1140 | 1180 |
Technical Specifications
| Specification | U-Value | SHGC |
|---|---|---|
| Roof Window | 1.3 | 0.30 |
| Glass only | 1.0 | 0.30 |
U-Value & SHGC calculated according to EN 14351-1:2006 & EN 10077-1/2.
| Frame & Sash | White pre-painted pine |
| Glazing | Laminated double glazing (standard) |
| UV Protection | 99% reduction of harmful UV spectrum (UVA & UVB) |
| Roof Pitch Suitability | 15° – 55° |
| Installation Type | In-reach (within-reach) applications only |
| Compliance |
CodeMark certified AS 4285 – Skylight Standard (except cyclonic wind pressure) AS 1288 – Overhead Glazing AS 4055 – Wind Loads, Non-Cyclonic Regions |
| Boundary Separation |
Class 1 & 10 buildings: within 900 mm of a boundary wall Class 2–9 buildings: 3 metres from a boundary wall |
| Flashing | EDW flashing kit for tile & corrugated iron roofs (sold separately) |
| Available Accessories | FHC Manual Honeycomb Blackout Blind, ZIL Insect Screen |
| Warranty |
10 years – skylight, glazing, frame, flashing & coverings 3 years – blinds |
*CSIRO assessment report available on request. VELUX recommends consultation with the relevant authority for a possible Performance Solution before work commences. Skylight assessed in closed position.
NCC Vol 1 & 2 (Prevention of Falls from Windows): contact VELUX on 1300 859 856 for information on restrictor devices for within-reach opening roof windows.

