6. Class Room

An extension to the rear. with a roof junction behind, has made getting natural daylight to this space problematic to say the least.

Various manufacturers produce ‘Sun-pies’- essentially reflective tubes to bounce sunlight from outside to a circular diffuser. Below is a Velux version. These could be used to get daylight from the awkward to reach South East side of the roof. An on-line calculation can be found HERE.

 

One problem with the current roof lights is that they are set between trussed rafters at relatively close centres, through a conventional ‘Cold roof’ (with the insulation at ceiling level). See rough sketch below:

 

More radical surgery  could involve a short section of warm roof (Ceiling follows external line of roof, rather than straight across the room). This will necessitate re-laying the roof with special insulation board, counter- battens & an impervious membrane, but has the advantage of allowing large areas of unobstructed daylight. Existing sun-pipe could be concentrated on the side corridors, possibly from a more South facing sections of roof.

 

 

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