Sound damping wallboard and method of constructing a sound damping wallboard

A sound damping wallboard, comprising:

• a gypsum layer having a gypsum layer outer surface and a gypsum layer inner surface opposite the gypsum layer outer surface;
• a first encasing layer disposed on the gypsum layer outer surface wherein the first encasing layer includes paper;
• a first sound damping layer having a first sound damping layer surface opposite the gypsum layer;
• a second encasing layer disposed on the first sound damping layer surface;
• a third encasing layer disposed on the gypsum layer inner surface wherein the first sound damping layer is positioned on the third encasing layer;
• a second sound damping layer positioned on the second encasing layer, and having a second sound damping layer surface opposite the first sound damping layer;
• a fourth encasing layer disposed on the second sound damping layer surface wherein the third encasing layer comprises paper, fiberglass, foil, or a polymer;
• and
• a first edge encasing layer present on an edge of the sound damping wallboard, wherein the first edge encasing layer connects the first encasing layer and the fourth encasing layer, wherein the first edge encasing layer is formed of a material selected from the group consisting of paper, fiberglass, and foil.

A method of forming a sound damping wallboard, the method comprising:

• providing a first encasing layer;
• forming a gypsum layer on the first encasing layer, the gypsum layer having a gypsum layer outer surface on the first encasing layer and a gypsum layer inner surface opposite the gypsum layer outer surface;
• providing a third encasing layer at the gypsum layer inner surface wherein the third encasing layer comprises paper;
• providing a first sound damping layer on the third encasing layer wherein the first sound damping layer has a first sound damping layer inner surface opposite the gypsum layer inner surface;
• providing a second encasing layer at the first sound damping layer inner surface;
• providing a second sound damping layer on the second encasing layer wherein the second sound damping layer has a second sound damping layer inner surface opposite the first sound damping layer inner surface;
• providing a fourth encasing layer at the second sound damping layer inner surface wherein the fourth encasing layer includes paper, fiberglass, foil, or a polymer;
• and
• providing a first edge encasing layer, wherein the first edge encasing layer is present on an edge of the sound damping wallboard, wherein the first edge encasing layer connects the first encasing layer and the fourth encasing layer, wherein the first edge encasing layer is formed of a material selected from the group consisting of paper, fiberglass, and foil.