Abstract: A three dimensional scaffold formed of mesh, or semi-porous material is designed to be inserted into and to surround an opening in the exterior structure of a building to receive a fenestration product such as a door, a vent, a window and a skylight. The three dimensional scaffold is pre-formed into three-dimensional shapes that include corners, returns, back-dams, and optional head flaps that provide a scaffold and backing for the application of a fluid applied water/weather-proofing material. The separate fluid applied waterproofing/weatherproofing may be applied by spray, brush or roll and can be asphalt, rubber, plastic or other fluid applied material. The scaffolding may be formed out of mesh, or other semi-porous fiberglass, metal, plastic, synthetic or other material that can be formed into three dimensional shapes.