Vented insulation panel with foamed spacer members

A thermally insulative building construction panel comprising:

• a first sheet, the first sheet comprising an insulation material having a density less than 5 lb./cubic foot and an insulative "R" value in excess of 5.0 per inch thickness;
• a second sheet, the second sheet comprising a rigid nail-anchoring material having a density in excess of 25 lb./cubic foot;
• a plurality of spacer members connected in fixed positions between the first sheet and the second sheet for defining air channels between the sheets and the spacer members, the spacer members being directly connected to the first sheet and the second sheet for maintaining a spaced parallel relationship between the first sheet and the second sheet;
• and,
• wherein the panel has a first edge and a second edge parallel to the first edge, wherein edge spacer members positioned proximate the first edge and the second edge have a first width W1 across a first dimension extending from the first edge to the second edge, and wherein intermediate spacer members positioned between the first edge and the second edge have a second width W2 across the first dimension, the second width W2 being greater than the first width W1 and the first width being at least four inches.