There is so much more to the design of a dwelling than just materials specification.
- framing of views
- orientation of rooms
- ratio of window to wall
- use of thermal mass internally
- draft lobbies and porches installations
In general windows give light and amenity, but they also emit more heat than a well-insulated wall.
Adding more layers of glazing is one way of combatting heat loss, but so is glass specification and surface finish.
This a just a very short list of some of the key items that can mitigate the effects of having a lot of windows in the house design.
The time to address the balancing of these factors and make real savings on fuel bills while maintaining light and amenity is at design stage - with your Architect!
ONQ
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All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.