$(3)$ Typical section through stairs

Task $3$

Work out embodied carbon in the windows

Work out the area of the voids $-$ they are all the same area so just multiply

this by the number of voids to get the total area.

Half the area of the voids will be filled with window so work out the total

surface area of window required

For the embodied carbon in the windows use the value given for a $1\mathrm{.}21\mathrm{.}2$

single glazed timber framed window.