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South facing extension - size of overhang for shade

  • 12-12-2022 12:15pm
    Registered Users Posts: 306 ✭✭


    We're planning to build a south facing extension, 4m x 4m and 3m floor to ceiling. We're trying to work out the best sizing for the roof overhand to prevent too much heat during summer months. The following calculator is something we've been looking at but am at a loss how to use it once all the variables are in. Would welcome your thoughts.

    Would be great also to hear experiences of what depths and heights of overhang work / don't work.




  • Registered Users Posts: 518 ✭✭✭mike_2009

    Either go for solar control glazing (add 3M film) or maybe a retractable shade? You'll need at least a meter out from the wall/window for high summer I would imagine? Look like you have it under control based on the figures above during the peak months?

  • Registered Users Posts: 306 ✭✭william

    Thank you Mike_2009. The Solar Control Glazing looks like the way to go once it lets daylight through. With that, do you think it's possible to pull back the depth of the overhang? to say 50cm?