JamFlash®

JAMFLASH® is a semi rigid, 40 mil thick, UV resistant, extruded plastic flashing product for flashing window, storefront, curtainwall and door jambs in masonry cavity walls. We developed this products in 1998 to provide the building construction industry with a cost effective and easy to install flashing system to prevent water intrusion into the gap between the rough opening and the fenestration frame. It has been used on over three hundred projects since its inception with great success.

Metal conducts heat. Heat seeks cold. The use of metal flashings can result in the loss of heat within them to the point where their temperature is below the dew point temperature of the air surrounding them. When this occurs, condensation will form on the surface of the metal flashing and could collect in locations within the exterior wall where it can cause mold, corrosion or degradation of materials.

JamFlash® Application Sketches

• • • Jamflash® Sketch At Window With Hollow Mullion
    • Jamflash® Sketch At Window With Return Mullion
    •  Jamflash® Sketch At Window With Solid Mullion
    •  Jamflash® Sketch At Window With Hollow Mullion In AVB Wall
    • Jamflash® Sketch At Window With Return Mullion In AVB Wall
    •  Jamflash® Sketch At Window With Solid Mullion In AVB Wall

Jamflash® Installation Instructions

• • • • Window In Cavity Wall LGMF BU With Loose Lintel
      • Window In Cavity Wall LGMF BU With Hung Lintel
      • Window In AVB Wall LGMF BU With Loose Lintel
      • Window In AVB Wall LGMF BU With Hung Lintel

JamFlash® Specification

Specification  pdf

Specification word