Cathedral celing

[anotheruser]

Is there any good way of insulating a cathedral ceiling? I am think of building some loft rooms that would make use of a cathedral ceiling to make the height of the room right for the lofts. I realize that this is probably not the most practical way to build but I am trying to squeeze out room in limited spaces so came up with the idea of doing it that way. Building codes dictate I can not do a full second story so using the roof as a loft is the work around.

[johnatong]

Why not consult an Architect about the options/possibilities ?

[wayned]

I'd finish the inside ceiling with Sheetrock (gypsum board) flush with the existing rafters and sandwich installation with paper/foil on both sides, at least R6, between it and the roof. You will most likely have to add additional rafters on 24' (60cm) centers to attach the Sheetrock to.

[Morakot]

Why not consult an Architect about the options/possibilities ?

How much of a DIY project would this be then?

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Edited March 29, 2016 by Morakot

[IMHO]

You might want to consider using the Thermaline gypsum: http://www.gyproc.co.th/en/gyproc-thermaline/