One of the first commonly employed weep details was the sash cord or ‘rope’ weep. In some cases, this detail was expanded with sections of the sash cord laid in the cavity and then extended through the wall, usually at a head joint.
In early iterations of exterior insulation and finish systems (EIFS), issues occurred when board stock rigid insulation was layered against other rigid insulation or exterior sheathing, or when decking traps moisture between the layers of material.
Designing and constructing with structural insulated panels (SIPs) can create a tight, energy-efficient building envelope. As with other high-performance wall and roof assemblies, managing air flow and moisture is necessary for maximizing energy savings, occupant comfort, and building longevity.