VELUX Roof Window Buying Guide

Planning to Install a VELUX Roof Window?

VELUX roof windows can transform dark lofts, extensions and upstairs rooms with natural light and fresh air. This buying guide walks through the key choices — window type, size, finish, glazing, flashings and accessories — so you can plan your project with confidence.

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1. Choosing a VELUX Roof Window Type

The two most common types are:

• Centre pivot: The sash pivots around a central hinge, making it easy to operate even with furniture below. A great all-round choice for most spaces.
• Top-hung: Opens outwards from the top, giving more headroom and clear views when standing. Ideal for loft conversions and lower installation heights.

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2. Selecting the Right Size

Window size is crucial for daylight and views. Popular sizes like MK04 (780x980mm) and MK06 (780x1180mm) suit many UK homes.

Consider:

• Room size and ceiling height.
• Whether you want one large window or several smaller units.
• Positions that keep the handle within easy reach.

For a detailed breakdown of size codes, see our VELUX Roof Window Size & Code Guide.

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3. Choosing a Finish: White Painted or Pine

Most VELUX roof windows are available in two main internal finishes:

• White painted: Clean, modern and bright. Works well in most interiors and helps reflect light — now the most popular finish for lofts and extensions.
• Pine: A natural wood look that suits traditional or rustic interiors.

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4. Glazing Options

Glazing affects comfort, noise and energy performance. Many windows are supplied with high-performance double glazing such as 2070, but you can upgrade to other options.

Think about:

• Energy efficiency and U-values.
• Noise reduction for busy locations.
• Solar control for sunny roofs.
• Triple glazing for low-energy builds.

For more detail, see our VELUX Glazing Options Guide.

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5. Flashings & Roof Type

Correct flashings are essential for a weather-tight installation. The flashing depends on your roof covering:

• EDW: For profiled tiles up to around 120mm.
• EDL: For standard slates up to around 8mm.
• EDP: For plain tiles up to around 15mm.

The flashing code must match the window size (e.g. GGL MK04 with EDW MK04). For more, see our VELUX Flashing & Installation Guide and How to Measure Roof Pitch Guide.

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6. Roof Pitch and Structure

Most VELUX roof windows are suitable for pitches between approximately 15° and 90°, but always check product details.

Consider:

• Window height for easy operation.
• Views when seated and standing.
• How the window integrates with a warm or cold roof build-up.

For more on roof build-ups, see our VELUX Warm Roof vs Cold Roof Guide.

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7. Blinds & Shading

Blinds and shading help control light, heat and privacy:

• Blackout blinds for bedrooms and nurseries.
• Translucent or pleated blinds for living areas.
• Venetian blinds for bathrooms and kitchens.
• External awnings and shutters for heat control.

For a full overview, see our VELUX Blinds & Shading Guide.

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8. Installation, Costs & Regulations

Before ordering, think about:

• Installation costs: Labour, scaffolding, internal finishing – see our VELUX Installation Costs & Considerations Guide.
• Planning & building regs: Especially for loft conversions and conservation areas – see VELUX Planning Permission & Building Regulations Guide.
• Condensation & ventilation: Particularly in lofts, bathrooms and kitchens – see VELUX Condensation & Ventilation Guide.

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Related VELUX Guides

• VELUX Roof Window Size & Code Guide
• VELUX Glazing Options Guide
• VELUX Flashing & Installation Guide
• VELUX Installation Costs & Considerations
• VELUX Roof Window Replacement Guide
• VELUX Blinds & Shading Guide

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