Water intrusion prevention method and apparatus

A method of installing a framed object into a rough opening of a building, the framed object having sides and a nailing flange, the method comprising:

• a) inserting the framed object into the rough opening;
• b) fixing the framed object in the rough opening by nailing through the nailing flange of the framed object, the framed object being fixed so as to create a space between the sides of the framed object and the rough opening;
• c) after step b), introducing a barrier object into the space between the framed object and the rough opening, wherein act of introducing the barrier object into the space causes the barrier object to conform to the space between the framed object and the rough opening;
• and
• d) after step c), inserting foam into the space up to and abutting an interior face of the barrier object, wherein the interior face blocks the foam from reaching the nailing flange.

A building comprising:

• a) a rough opening;
• b) a framed object having a nailing flange, the nailing flange of the framed object being nailed to the rough opening with the framed object positioned within the rough opening so as to create a space between framed object and the rough opening;
• c) a barrier object positioned within the space between the framed object and the rough opening adjacent to the nailing flange;
• d) foam material within the space that abuts an interior face of the barrier object and does not extend past the interior face of the barrier object.