Anyone know the best way to insulate a
Brick built extension which in the winter months is so cold as to be unusable ?
Built in the 1920s, its single storey with pitched roof, rock wool insulated ,three exterior walls, pebbled dashed. It does not appear to have cavity walls although is a double layer of bricks and they are very cold to the touch - so is the best method to line interior with some kind of insulating board ?
Thanks in advance for yr advice
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