Size Grids and Guide Sizes
This section outlines the most common building sizes available for order and highlights the option for bespoke measurements for rooflights.

Shapes
Available shapes for rooflights include Dome, Flat Sealed, Access Hatch, Pyramid, Trapezoid, Hexagonal, and Circular.

Ventilation Options
Rooflights can be un-ventilated or have background ventilation with built-in kerbs. Comfort options include hinged, vertical lift, and mechanical AOV systems.

Heat and Smoke Management
Kerb options include splayed, vertical, and adapter types that fit on builders' upstands.

Glazing and Ud-values
Four standards are provided for Ud-values:

• 1.0 W/m2: Glass x 2 + Polycarbonate x 1 with PVCu kerb
• 1.6 W/m2: Polycarbonate x 3 with PVCu kerb
• 1.2-1.7 W/m2: Glass x 2 or Polycarbonate x 3 with thermally broken aluminium kerb
• 3.6-5.4 W/m2: Polycarbonate x 2 or Polycarbonate x 1 with aluminium kerb

Users can build their own Ud-value by choosing specific glazing options.

Attachment to the Roof
Options include flat board insulated roof, direct to roof deck, sleeve over existing kerb/upstand, plinth on existing builders' kerb, and builders' upstand on existing sub-construction.

Glazing/Panes Colour and Structure
Available options include clear glass, diffused polycarbonate, opal polycarbonate, bronze polycarbonate, and clear polycarbonate.

Security Features
Security measures include security screws, tamper-resistant systems, security frames, and intruder grids.

Quick Guide to Dome Rooflights
This section provides a quick reference for dome rooflights, with specific model numbers or sizes indicated.