MARDOME TRADE OPENING – CONTROLLED DAYLIGHTING & VENTILATION
The Mardome Trade Opening Polycarbonate Dome Rooflight is designed to provide natural daylight and controlled ventilation for commercial and industrial flat roofs. This model is used where airflow is required through a manual or powered opening. A separate fixed polycarbonate rooflight is available for applications where ventilation is not required.
GLAZING OPTIONS
Single Skin
Used in unheated buildings where insulation is not required.
Double Skin
Used in lightly heated buildings to reduce heat loss and condensation.
Triple Skin
Used where improved thermal performance is required with good daylight levels.
Quad Skin
Used where higher insulation and added impact resistance are required.
OPENING OPTIONS
Manual Opening
Used where the rooflight is within reach and only occasional opening is required.
Powered – Wall Switch
Used where regular operation is required and simple fixed control is preferred.
Powered – Remote Control
Used where the rooflight is out of reach or where easier access is required.
Powered – Rain Sensor
Used where automatic closing is required during rainfall.
AVAILABLE SIZES AND TINT OPTIONS
This opening rooflight is available in standard sizes to suit common roof openings. Lengths (mm): 600, 750, 900, 1050, 1200, 1350, 1500, 1650, 1800. Widths (mm): 600, 750, 900, 1050, 1200, 1350, 1500. The selected size should allow sufficient daylight while maintaining roof structure and spacing requirements. For multiple rooflights, spacing should be planned to provide even light distribution across the area.
Tint Options
Tint options are used to control light levels and glare. The three available finishes cover the most common daylighting and privacy requirements for commercial and industrial applications.
Clear Polycarbonate: Used where high light transmission is required. Provides maximum natural light into the space below.
Opal Finish: Used to diffuse light and reduce glare. Distributes daylight more evenly across the internal space.
Patterned Finish: Used where diffused light and added privacy are required. Suitable for areas where direct visibility through the rooflight is not desirable.
Shape and Kerb Options
The low-rise dome is used for general flat roof applications. A low-rise pyramid is also available where a wider light spread is required across internal spaces.
Kerb Options include installation onto a builder's upstand (refurbishment), a 150mm PVC kerb for standard flat roof build-ups, or a 300mm PVC kerb where thicker insulation or increased waterproofing height is required.
Mardome Trade Opening Polycarbonate Rooflight
The Mardome Trade Opening Polycarbonate Rooflight offers a reliable solution for bringing natural daylight and controlled ventilation into flat-roof buildings. Built from high-quality, UV-stabilised polycarbonate, it is available with manual or powered opening to suit the access requirements and frequency of use on any project.
Ideal for a wide range of commercial and industrial sectors, the Mardome Trade Opening Rooflight combines ease of installation, low maintenance, and proven durability. Whether you are working on a new-build, refurbishment, or replacement project, this unit is built to deliver lasting value.
Product Overview
This opening rooflight allows natural light and ventilation into the building, ideal for spaces where airflow needs to be controlled. The Mardome Trade Opening Rooflight is available in a wide range of sizes, with options for glazing skins, tints, shapes, and kerb types to meet your project's specific performance and aesthetic requirements.
Key Features & Benefits
Opening Design: Manual or powered opening for controlled natural ventilation.
Impact Resistant: Manufactured from tough polycarbonate for superior durability.
UV Stability: UV-stabilised glazing prevents yellowing and maintains clarity.
Glazing Choice: Available with single-, double-, triple-, or quad-skin glazing.
Tint Options: Choice of clear, opal (diffused), or patterned finishes.
Versatile Fit: Suitable for installation onto an existing builder's upstand or supplied with a 150mm or 300mm PVC kerb.
Compliance: Fully compliant with relevant UK building regulations for daylighting and ventilation.
Explore Our Full Range
PDF Resources
Technical Specifications
Customise your rooflight to match your property’s thermal and aesthetic requirements.
Installation & Pitch
Roof Pitch: Suitable for flat roofs and low-pitched roofs up to 15°.
Mounting: Direct to builder's upstand or with Brett Martin insulated kerb.
Glazing & Tint Options
Choose the right combination of skins and tint for your privacy and thermal needs.
| Glazing Skin | Available Tints |
| Single Skin | Clear, Opal, Patterned |
| Double Skin | Clear, Opal, Patterned |
| Triple Skin | Clear, Opal, Patterned |
PDF Resources
The Mardome Trade Opening Polycarbonate Rooflight is designed for simple, secure installation on flat or low-pitch roofs.
It can be mounted onto an existing builder's upstand or installed with a supplied insulated kerb. The opening mechanism is available in both manual and powered options for added flexibility.
Installation guidelines
- Suitable for installation onto existing builder's upstands or with a supplied Brett Martin insulated kerb.
- Ensure the upstand is correctly dimensioned, insulated, and weathered prior to installation.
- Glazing must be correctly orientated, with the UV-resistant layer facing upwards (as marked).
- For powered opening versions, ensure electrical connections are made by a qualified electrician in accordance with current wiring regulations.
- Thermal fracture caution: Avoid placing blinds directly beneath the glazing; use light-coloured blinds positioned away from the rooflight to reduce risk of thermal stress fracture.
- Minimum upstand height and slope should be checked per building regulations and installation guide recommendations.
*Brett Martin Daylight Systems operates a policy of continuous product improvement and reserves the right to alter specifications at any time without notice. Every effort has been taken to ensure all details contained in this video are correct at the time of release but this video should be used only as a guide and does not in any way form part of a contract or warranty. It is the customer's responsibility to ensure that the product is suitable for the actual conditions of use, which are beyond the control of Brett Martin Daylight Systems.
How your mardome rooflight Is Delivered
- Delivered kerbside by the Brett Martin transport fleet
- Glass and frame delivered together on an A-frame
- Driver can assist with unloading if required
- Sacrificial foam runners protect the glass during unloading
- The A-frame is removed by the driver after delivery
Important: Please ensure someone is present on the day of delivery to help unload the rooflight from the lorry.
Delivery Times
Standard Trade Fixed rooflights delivered within 1–2 working days. Free UK mainland delivery.
Orders placed before 12 noon (Monday to Friday) are prioritised for dispatch.
Delivery Cost
Delivery is free to all UK mainland addresses.
Excluded Postcodes
We currently do not deliver to the following areas without prior arrangement:
Scotland, Northern Ireland, Channel Islands & Remote Areas
HS, IM, IV, ZE, BT, KA27–28, KWA, PA20–49, PH17–50, PO30–40, TR21–25, LL58–78
Contact our team to check if delivery to your area can be arranged.
What is an opening dome rooflight?
Are polycarbonate rooflights suitable for a flat roof?
What are the benefits of a polycarbonate rooflight?
Does it comply with building regulations?
What are the U-values?
Centre pane U-values by glazing type:
Single skin: 5.5 W/m²K
Double skin: 2.7 W/m²K
Triple skin: 1.8 W/m²K
