You can rotate the texture to suit. Apply the material to the face then draw in diagonal lines at the corners to divide the insulation into separate faces. Right click on the face where the texture needs to be rotated, choose Texture>Position. Right click on it again and choose Rotate>90°.
Once you have the material rotated on one face, you can sample it and apply it to the other faces as needed.
A texture will make more sense for this than trying to draw it as geometry.