Pre-cut fibrous insulation for custom fitting building cavities of different widths

A pre-cut fibrous insulation blanket for custom fitting the insulation blanket into cavities of different widths formed by building framework, comprising:

• an elongated fibrous insulation blanket;
• the fibrous insulation blanket having a length, a width and a thickness;
• the fibrous insulation blanket having a first major surface and a second major surface;
• the fibrous insulation blanket having a first cut in the first major surface of the fibrous insulation blanket extending for the length of the fibrous insulation blanket and spaced inwardly from both lateral edges of the fibrous insulation blanket;
• the fibrous insulation blanket having a second cut in the second major surface of the fibrous insulation blanket extending for the length of the fibrous insulation blanket and spaced inwardly from both lateral edges of the fibrous insulation blanket;
• the first cut and the second cut being spaced from each other a distance sufficient to form a first separable connector between the first and second cuts which joins adjacent sections of the fibrous insulation blanket;
• the first separable connector holding together the adjacent sections of the fibrous insulation blanket joined by the first separable connector for handling and being separable by hand whereby the fibrous insulation blanket can be handled as a unit for insulating a cavity having a width about equal to the width of the fibrous insulation blanket or easily separated by hand into sections at the separable connector formed between the first and second cuts for insulating a cavity having a lesser width.