Technical Info

Technical Info

Do not take chances. Make sure that your conservatory has the tried and tested roofing system with independent certification to prove it.

Complete Structural Integrity

The government test agency, the British Board of Agrement (BBA) stated ‘the conservatory roofs will have a life of at least 25 years.’

When you sit in your conservatory, no one can imagine what the weather will impose on your roof. Over an average 25 years, it would include:-

  •     15,300mm of rainfall
  •     450 days with snow falling
  •     57 days of hail the size of peas
  •     9125 days with temperatures in the range of -15°C in winter to +50°C in summer
  •     300 visits by window cleaners, house painters and aerial riggers.

So, you can see why it needs to be tough. When the wind blows on to the face of a conservatory there is a consequent build-up of pressure on the back face. As it is deflected over the roof and round the sides the reduction in pressure creates suction in these areas. Careful design is needed to ensure the integrity of the whole structure and to prevent water ingress. In winds of 110mph and heavy rainfall, equivalent to the worst UK conditions, the BBA have given the roofing system a 25 year life expectancy. Typically, the roof is designed in line with British Standards to support an imposed load of 75 kilogrammes per m² – equivalent to 600mm or 24″ of snow in one fall or equivalent of one and a half bags of cement. In remote areas of the Highlands and Islands even greater loads are designed for.

The combination of these factors means that the roof has to be strong, durable and attractive. Each roof is carefully specified from a portfolio of 3500 components, ensuring maximum structural performance. The roof system comprises structural aluminium profiles which have bolted joints rather than poorer quality screws which are often employed. Each structural aluminum profile is then capped and clad with PVCu; these items are known as thermal cladding and they minimise the formation of condensation.

Statutory Obligations

All roofs are designed in accordance with all relevant British Standards and Codes of Practice. BS 6399:Part 3 : 1988 Snow loading for buildings CP 3:Chapter V : Part 2 : 1972 Wind loadings CP 118:85 8118 Structural use of aluminium BS5516:Overhead Glazing. Planning Permission and Local Authority Building Regulation Approval is generally not required. It is always advisable to ask your conservatory installer to check with the Local Authority to see if an application is necessary.

This freeing up of the market has meant that any inspection previousIy done by Councils is no longer necessary and this leaves you in the hands of the installer. Ensure that you ask the unstaller to specify the most tried and tested system.