We don't own much big woodworking machinery and the basic design was conceived so that it would be possible to make these doors possessing only fairly simple tools, whilst still producing decent glue joints. By obtaining pre-planed and dimensioned wood from a local sawmill, I figured I should be able to laminate together some fine joinery and make some good triple glazed oak doors.
These are designed to be super insulative: they have a composite cork construction, well specified triple glazed units, and a double weatherseal round the edges.
Here are the results. Any questions just ask.