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Single Glazed Roof Access Hatch

  • £445.74 (ex. VAT)
  • £474.17 (ex. VAT)
Item in Stock   |   Free Next Working Day Delivery (Mon-Fri)
Want it by Friday 8th December? Order within 12 hours, 28 minutes and choose FREE Delivery to most of UK (Mon-Fri) at checkout.
FREE DELIVERY to most of UK See above for delivery estimate

Glazed Roof Access Hatch - Single skin polycarbonate dome

•    3 kerb options
•    Sleek, low rise dome
•    Large daylight area
•    Secure fixings
•    Can be fitted on roofs with pitch up to 15°
•    All rectangular hatches are hinged on the long side.

Roof access hatch fitted with gas struts which gently open to between 70° - 83° for access. This opening angle range varies according to the size of hatch you order (See technical drawing tab for more information). Our sleek design features an aesthetically pleasing low rise polycarbonate dome fitted to a choice of PVC kerbs. The dome cassette is attached to the kerb using innovative security fixings which spin once they reach a certain torque. This means they cannot be accidentally overtightened during installation, but also cannot be undone without a specialist tool (one supplied with each hatch). Each hatch is fitted with a secure handle which allows manual opening. The entire range has been independently tested and accredited by the British Board of Agreement (BBA) or by EN 12101 assessments, and is CE marked in accordance with BS EN 1873 or EN 12101 testifying compliance with Building Regulations and industry good practice.

Kerb Options

DF Kerb - a 100mm PVC kerb designed to be fitted to an existing upstand
150mm or 300mm Multi-wall PVC construction with superior thermal performance – Fits straight to roof deck, the kerb foot radius is designed to allow the easy application of roof covering up to the termination point/ membrane clamp.

The 150mm and 300mm* kerbs slope at a steeper angle than some rival products. This results in a larger daylight area; reduced by only 150mm on each dimension resulting in a greater daylight area (25% on small sizes and 10% on big sizes). Additionally it means a bigger clear area for access.
Kerb height – 150mm and 300mm refers to the membrane termination height, the actual height to the top of the kerb is 216mm and 365mm respectively.
*300mm Kerb is for use where additional insulation is being added to the roof.

>Polycarbonate roof dome size guide


Dome cassettes are constructed from UV stable Polycarbonate. Polycarbonate is 200 times more impact resistant than glass. Please note this product listing is the single glazed dome version. Available in 3 colour options.

Thermal performance comparison

To comply with Part L Building Regulation requirements roof domes must achieve a U value of 2.2 W/m²K or lower. Our 150mm and 300mm PVC kerbs achieve the following U-Value range
Double Glazed with 150mm or 300mm PVC Kerb 1.6 – 2.1 W/m²K (exceeds thermal requirements of Part L in all sizes)
Triple Glazed with 150mm or 300mm PVC kerb 1.2 – 1.5 W/m²K (exceeds thermal requirements of Part L in all sizes)
Quadruple Glazed with 150mm or 300mm PVC kerb

 Glazing U-Value
DF Kerb
U-Value 150/300mm PVC Kerb Acoustic Airborne Sound Index
Single  n/a  n/a 12dB
 Double  2.0 - 2.4W/m²K  1.6 - 2.1* W/m²K 20dB
 Triple  1.5 - 1.7 W/m²K  1.2 - 1.5* W/m²K 22dB
 Quadruple  1.3 - 1.4 W/m²K  1.1 - 1.3 *W/m²K >22dB

*Meets or exceeds Part L Building Regulations requirements for Roof Domes (2.2 W/m²K)
Please note the DF kerb is less thermally efficient (Double Glazed 2.7 W/m²K Triple Glazed 1.8 W/m²K)
 (triple and Quad skin models offer class leading thermal performance and resistance to condensation. By providing full insulation across the whole width of the rooflight (including the fixing flange), this eliminates any cold spots associated with traditional methods of dome rooflight construction and giving a much higher f-factor.

Light Transmission 

Glazing colour options

Please note as this item is built to order, any returns are subject to a disassembly and restocking charge

Note: Textured is available at the same price as the equivalent size clear or opal dome - Please telephone to order


The product is designed to have a life of at least 20 years and is guaranteed for 10 years.

Fitting & installation

Each hatch is supplied with fitting/installation instructions. The hatch is designed to be fitted to a range of roofing systems including single ply, bituminous, metal and liquid applied. This versatile product is suitable for a wide range of flat roof applications. Ideal for new builds and refurbishment projects, this product is routinely used for both residential and commercial projects. (Please note while we describe this as a flat roof product it can be fitted to roofs with a pitch not exceeding a 15° roofing application).,/p>

Acoustic Performance

Mardome Rooflights are independently tested for Rain Noise Penetration to BS EN 140-18: 2006.

Wind and Snow Loads

Independently tested to resist wind loads calculated in accordance with BS EN 1991-1-4: 2005, and imposed loads in accordance with BS EN 1873: 2005

Fire Ratings

Class B fire rated, tested to BS EN 13501: Part 1, See TB413.

Safety Requirements and CDM

Mardome Trade Rooflights achieve Class B non-fragility to ACR[M]001.

Additional options

Security grills are available for enhanced security
Soaker kerbs available - ask for details
Glazed roof hatch Thermal and acoustic performance

Opening Angle information

Dome size (mm) Opening Angle Tolerance

Dome size (mm)

Opening Angle Tolerance
900 x 750 83 ±2 1350 x 900 75 ±1
900 x 900 75 ±1 1350 x 1050 75 ±1
1050 x 750 83 ±2 1500 x 750 83 ±2
1050 x 900 75 ±1 1500 x 900 75 ±1
1050 x 1050 75 ±1 1500 x 1050 75 ±1
1200 x 750 83 ±2 1650 x 750 83 ±2
1200 x 900 75 ±1 1650 x 900 75 ±1
1200 x 1050 75 ±1 1650 x 1050 75 ±1
1200 x 1200 70 ±1 1800 x 750 83 ±2
1350 x 750 83 ±2 1800 x 900 75 ±1

 Technical bulletins

PDF Icon Installation Mardome Trade Opening Roof Hatches
Click to view Data Sheet - Mardome Trade
Click to view Mardome Product Care information
Click to view Mardome product range sample product weights - See Mardome Trade for this product


UK Delivery Zones

The lead times and delivery service are displayed against each product, just below the price.
We will continue to send items on a Next working day delivery, but please accept delivery might take longer, this is out of our control.

Please note, for certain products and delivery zones we can offer AM deliveries and Saturday Deliveries, if available, you'll be able to select and pay for these options via the checkout.

Delivery Charges will be applied for deliveries to geographical  areas represented as Zones C and D:
This includes certain parts of Scotland, Scottish Islands, Northern Ireland, Channel Islands and IOM)

We only supply to Trade Account Customers in Zone E

Cancellations:- Any stock item which is cancelled after having been dispatched, but before you have received it will be subject to a minimum fee of £25.00 + VAT for parcels and a minimum of £70 + VAT for pallets. Bespoke (made to measure) orders cannot be cancelled once ordered.

You can return a standard product (most access panels, loft hatches, accessories and Steel / Aluminium Roof Hatches) within 14 days of receipt. Roof domes, Roof Lights, Glazed Roof Hatches and AOV Smoke Vents will be subject to a collection restocking fee.
Please note Made to measure products cannot be returned.
Click here to download a return form.