HAL-TEX RAINBOARD is a three ply laminated sheet made up of a grade "D" corrugated asphalt kraft building paper at its centre and faced on each side with grade "D" asphalt-kraft building paper. The innocative method of its production and lamination results in the creation of a semi-rigid lightwieght sheet, which is water-resistant, but permeable to water vapour. HAL-TEX RAINBOARD meets the requirements of the CAN/CGSB 51.32 and UU-B-790a standards for breathable sheathing membranes for frame walls. HAL-TEX RAINBOARD represents a major step forward in outer wall protection. It provides seperation and better moisture resistance between the outer wall cladding and the moisture sensitive wall structure for better moisture protection.