Building surface panels and method of forming the same

A building surface panel comprising:

• an outer element;
• and
• a backing component comprising a first backing layer having a first backing composition that is attached to a second backing layer having a second backing composition, wherein the first backing layer is attached to the outer element to form the building surface panel,
• wherein the building surface panel further comprises one or more of:
• a room temperature coefficient of thermal expansion (CTE) mismatch between the outer element and the backing component of not greater than about 20%,
• a deflection measurement of not greater than about 10 mm if subjected to a curvature test at least 90 days after formation of the building surface panel,
• a first thickness of the backing component being 0.5 to 5.0 times a second thickness of the outer element,
• a density of the backing component being at least 0.4 grams/cm3 but not greater than 2.0 grams/cm3,
• one or more longitudinally extending ribs that protrude from the backing component,
• a longitudinally extending groove formed in either the outer element or the backing component,
• a longitudinally extending tongue formed in either the outer element or the backing component, and
• either the outer element or the backing component comprises a density of at least 0.4 grams/cm3 but not greater than 2.0 grams/cm3.

A building surface panel comprising:

• an outer element;
• and
• a backing component comprising a first backing layer having a first backing composition that is attached to a second backing layer having a second backing composition, wherein the first backing layer is attached to the outer element to form the building surface panel,
• wherein the outer element has a first front side, a first rear side, and a first thickness as measured between the first front side and the first rear side,
• wherein the backing component has a second front side, a second rear side, and a second thickness as measured between the second front side and the second rear side,
• wherein the second front side of the backing component is attached to the first rear side of the outer element, and
• wherein the second thickness is greater than or equal to 0.5 times the first thickness up to 5.0 times the first thickness.