Rooflights have a major impact on the energy efficiency of a building: installing rooflights to 15% or more of the roof area is a practical solution to ensure the lighting levels within the building are adequate, which can greatly reduce the artificial lighting requirement and a buildings CO2 emissions, particularly when used in conjunction with automatic lighting system control. The notional building used in Part L Building Regulations incorporates 12% roof area in rooflights, together with proportional automatic control of the electric lighting systems; research demonstrates that installing less than this amount will make Part L compliance much more difficult. Rooflights don't just improve the external environment. They improve the internal environment too. People prefer natural light to electric light and there is a growing body of scientific evidence to suggest that it helps us perform better. Studies have shown that school children learn better, hospital patients recover faster, factory workers are more productive and shoppers linger longer, spending more.
Marvault Trade and Ultra achieve class B non-fragility when tested to
Tested to BS EN 14963
Trickle and Powered Extraction Ventilation
Trickle ventilation (manual or automatic humidity controlled), or powered
extraction ventilation, can be incorporated into our PVC ventilation frame or
EN 13501-1 B,s1-d0
BS 476: Part 7 Class 1Y
NB Marlon ST (multiwall) will in most cases meet these classifications but
is subject to structure and thickness. For further details please contact our
Marvault Trade and Ultra are designed for a service life in excess of 25 years,
and are guaranteed to remain fit for purpose for at least 20 years. They are
glazed with high quality UV stable Marlon ST Longlife and Marlon FSX Longlife
polycarbonate sheet, with the assurance of a 10 year guarantee and specific
light transmission and impact properties.
Marvault is CE marked to BS EN 14963 and a declaration of performance is
Polycarbonate is an extremely strong material, but should always be treated with care. The material must not be scratched, and contact with abrasive materials must be avoided. Polycarbonate is not compatible with certain materials, including some chemicals, paints, solvents, sealants and plasticisers, and contact with any other materials should be avoided unless compatibility has been confirmed.
Maintenance and Cleaning
The general conditions of units and all accessories, particularly security of
fixings and sealants, should be checked periodically. Abrasive and alkali
cleaning materials should be avoided. Copious quantities of warm water with a
mild detergent and soft rag or sponge can be used to remove surface dirt.
Please contact Brett Martin for further guidance, including technical bulletins on installation, handling and maintenance, COSHH data sheets, NBS product specification clauses and CPD seminars.