Originally Posted by yummy mummy
Thanks very much Atlantic.
I will do as you say.
One more question, if I may.
Do I need to insulate the interior walls?
You need to insulate all exterior walls that are facing an unheated/cold area.
Any interior walls that are not facing (in your case) exterior feezewalls, do not need to be insulated.
(The exception to this is if you have a bathroom. It is best to insulate bathroom walls for sound purposes)
When insulating, you are creating what is called a 'heat envelope'. The inside of this 'envelope' is your living space. You want there to be a complete 'seal' of insulation around that 'envelope'.
Any walls INSIDE of that 'envelope' do not require insulation, if they are not part of what makes up the 'envelope'.