Patent ID: 7293391

Claim:
A fenestration unit comprising: a first glass pane having an inside surface and an outside surface, the inside surface having a border portion and an inner portion and the outside surface having a border portion and an inner portion; a second glass pane having an inside surface and an outside surface, the inside surface having a border portion and an inner portion, and the outside surface having a border portion and an inner portion, the inside surface of the first glass pane facing the inside surface of the second glass pane; a support structure comprising: a first receiving surface for receiving the border portion of the inside surface of the first glass pane, wherein the first glass pane is structurally supported solely at the border portion of the inside surface by the first receiving surface; and a second receiving surface for receiving the border portion of the inside surface of the second glass pane; wherein the second glass pane is structurally supported solely at the border portion of the inside surface by the second receiving surface; and a vapor barrier extending between and contacting the first receiving surface and the second receiving surface; wherein the first receiving surface comprises a first raised portion that contacts the border portion of the inside surface of the first glass pane, and wherein the second receiving surface comprises a second raised portion that contacts the border portion of the inside surface of the second glass pane; wherein a first primary sealant is located between the vapor barrier and the inside surface of the first glass pane and wherein a second primary sealant is located between the vapor barrier and the second glass pane; wherein the first glass pane is attached to the first receiving surface by a first secondary sealant and the second glass pane is attached to the second receiving surface by a second secondary sealant; wherein the first raised portion separates the first primary sealant from the first secondary sealant, and the second raised portion separates the second primary sealant from the second secondary sealant.