Should the house be insulated? 45 cm wall thickness

The situation is that the wall thickness is 45 cm (ytong), we can not dismantle the insulated house. Thank you in advance for your help.
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1 Answer

Answer :

I supposedly don't need to insulate it anymore, its thermal insulation is so good, but if you don't have a problem doing it, I think you should do it. The good can be even better and will definitely pay off over the years. 
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