Single tear pre-cut insulation blanket

A method of making a pre-cut resilient fibrous insulation blanket having a first longitudinally extending lateral blanket sections and a plurality of additional longitudinally extending blanket sections, including a second longitudinally extending lateral blanket section, wherein the additional blanket sections, including the second lateral blanket section, are of substantially equal width with respect to each other, comprising:

• providing a resilient fibrous insulation blanket having a length, a width W and a thickness;
• the fibrous material of the resilient fibrous insulation blanket being laterally compressible at least a distance D of 0.75 inches;
• determine the distance D for the fibrous material of the resilient fibrous insulation blanket;
• divide the distance D into the width W of the resilient fibrous insulation blanket to obtain a number;
• round the number up to the nearest higher odd integer and divide the nearest higher odd integer into the width W of the resilient fibrous insulation blanket to obtain a first possible width for the lateral blanket section of the resilient fibrous insulation blanket that is less than distance D;
• multiply the first possible width for the lateral blanket section by 2 to obtain a first possible width for each of the additional blanket sections of the resilient fibrous insulation blanket;
• round the number down to the nearest lower odd integer and divide the nearest lower odd integer into the width W of the resilient fibrous insulation blanket to obtain a second possible width for a the lateral blanket section of the resilient fibrous insulation blanket that is greater than the distance D;
• multiply the second possible width for the lateral blanket section by 2 to obtain a second possible width for each of the additional blanket sections of the resilient fibrous insulation blanket;
• compare the first possible widths for the blanket sections with the second possible widths for the blanket sections and select one set of possible widths for the blanket sections;
• and
• form a plurality of longitudinally extending cut and separable connector means in the resilient insulation blanket in accordance with the selected set of widths for the blanket sections to form the blanket sections in the resilient fibrous insulation blanket with the cut and separable connector means separably joining adjacent blanket sections of the blanket sections along the length of the resilient fibrous insulation blanket to hold the resilient fibrous insulation blanket together for handling while being separable by hand to permit separation of the adjacent blanket sections whereby the resilient fibrous insulation blanket can be handled as a unit or selectively separated by hand at any of the cut and separable connector means to form a reduced width resilient fibrous insulation blanket.