Patent ID: 8539733

Claim:
A method of producing an insulation panel configured to be fitted between joining profiles in a framework of an insulating building system, wherein the insulation panel is a mineral fiber wool panel, said method comprising the steps of: providing an insulation panel made of mineral fiber wool material with a density in the range of 60 to 100 kg/m 3 , the insulation panel having substantially parallel first and second main surfaces with substantially parallel, oppositely situated first and second profile contact sides and substantially parallel, oppositely situated third and fourth sides between said main surfaces; providing a groove along the first and second contact sides at a predetermined distance from the first main surface and substantially parallel with said first main surface, whereby said contact sides are divided into a profile abutment portion and a profile covering portion; removing material from the abutment portion of said contact sides so that each profile covering portion extends beyond the abutment portion of the contact side; and manipulating each said extending profile covering portion to provide a flex zone that is softer and more flexible than the remainder of the panel by reducing the fiber bonding in the flex zone, so as to provide a tight panel-to-panel fit and improved thermal insulation when a panel is joined to another panel in said profile covering portion of the first contact side.