Versatile barrel vault rooflights with a maximum span of 9 metres and hidden fixings.

  • Marvault HF's innovative aluminium glazing bar is invisibly fixed at the base of bar preventing fixings from weathering and providing a completely smooth profile.
  • The system offers a maximum spanning capacity of 9 metres and is available in 3 height options – 1/8, 1/5, or 1/2 of span.
  • Rooflights of unrestricted lengths can be created.
  • The carefully designed system has in-built drainage and effective sealings. The standard mill finish is brushed aluminium but can be powder coated to any specified colour.
  • Marvault HF uses Marlon ST Longlife and Marlon FSX, multi-wall and solid sheet polycarbonate, offering exceptional impact resistance and surface protection due to a co-extruded UV protective layer.



A number of opening options to provide natural ventilation can be incorporated into both Marvault HF and RL rooflights. Each of the ventilation options is available in a choice of either manual or powered opening. Marvault HF and RL can also be used in conjunction with automatic rain, heat and humidity sensor systems.


Polycarbonate is a self-venting material that softens at relatively low temperatures allowing fire, smoke and hot gases to escape. Class 1(Y) deemed SAA.


Polycarbonate’s mechanical performance is known to remain stable in prolonged service in temperatures ranging from -40ºC to +100ºC.


Marvault HF and RL rooflights have exceptional impact resistance and are particularly suitable for use in areas where breakage is a potential problem.


Marvault HF and RL are available in non-fragile options.


Marvault HF and RL multi skin options are available for U values down to 1.6W/m2K.


Marvault HF and RL are manufactured from high quality UV stable polycarbonate sheet. Marlon ST Longlife along with Marlon FSX Longlife are supplied with the assurance of a 10 year limited light transmission and breakage warranty.


Marvault HF and RL is supplied to site with bars pre-curved to tight tolerances and glazing cut to size. For simple trouble-free installation we recommened using one of our trained independent installers.

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