Building panel with a weather barrier

A sheathing panel includes a barrier overlay secured to a panel; wherein the sheathing panel is bulk water resistant and has at least one of the following properties: a water vapor transmission rate of at least 7.0 grams per square meter per 24 hours (grams/m 2/24 hours) as determined by ASTM E96-15 procedure A at 73° F. and 50% relative humidity (RH)， a water vapor permeance of at least 1.3 perms as determined by ASTM E96-15 procedure A at 73° F. and 50% relative humidity (RH)， or an air infiltration rate of less than 0.2 liters per second per square meter (L/s-m2) at 75 pascals (Pa) as determined by ASTM E2357-11.

一种覆面板材，包含固定于基板的阻隔覆层；该覆面板材具备整体防水性能，且满足以下至少一项性能指标：1. 在73华氏度、50%相对湿度（RH）环境下，依照美国材料与试验协会（American Society for Testing and Materials）E96-15标准方法A测得的水蒸气透过率不低于7.0克每平方米每24小时（克/㎡/24h）；2. 在73华氏度、50%相对湿度（RH）环境下，依照ASTM E96-15标准方法A测得的水蒸气渗透系数不低于1.3 perms；3. 在75帕斯卡（Pa）压差条件下，依照ASTM E2357-11标准测得的空气渗透率低于0.2升每秒每平方米（L/s·㎡）。