Abstract: The present invention relates to a wall system which has a solid wood construction on both an inner and outer side with an insulation cavity between, and to an improved building construction utilising the wall system. A plurality of boards is arranged in an interior stack of boards and an exterior stack of boards on a base platform. The interior and exterior stacks of boards are spaced apart by vertical members. The vertical members are spaced apart at spaced locations along the wall. The vertical members have a spanning portion; the interior and exterior stacks of boards are spaced apart by the width of the spanning portion. The vertical members extend across the height of a plurality of boards of each stack of boards.

Abstract: A building member is formed from a pair of spaced apart boards connected between the opposed faces by narrow connecting members which extend the length thereof. The edges of the connecting members are preferably retained within channels in the opposed faces of the wooden boards. The boards and the connecting members enclose an insulation space which may be filled with an insulation material. A selection of advantageous connection profiles is disclosed for the connection between the edge of the connecting member and the channel of a board. One of the boards may instead comprise an extruded siding, for example of aluminium or plastic, with a leg extending perpendicularly from the siding forming the connecting member. The building member may be constructed in a simple process and reduces wastage of material which often occurs in forming laminated solid timber building products while offering enhanced insulative properties.