BlockFlash is a complete, embeddable flashing solution for managing moisture in exterior single wythe CMU walls. It uses patented flashing pans to collect moisture in the wall and channel it to the exterior through integrated weep spouts. Its included drainage mesh provides hundreds of clear pathways for water to flow around mortar droppings inside the block cells so it can be collected by the pans.

*Formerly known as “Blok-Flash”

Features

Pans, integrated weep spouts and connector bridges made from high-density polypropylene
All 7″ x 14″ drainage mats made of 90% open weave polyester mesh
Factory-installed 90% open weave polyester mesh insect guards keep insects out of the block cells
Available for 6″, 8″, 10″, and 12″ standard or insulated concrete masonry units
Snap-off connector bridge allows fast and easy pan installation in reinforced wall systems and at corners
Integrated alignment lip on weep spout makes it fast and easy to accurately align flashing pans with block face
Drip spouts include a 45 degree drip edge to deflect moisture away from the wall and help prevent water marks and efflorescence
Sloped pans with integrated edge flanges catch and funnel water to the weep spouts

BlockFlash available in 6", 8", 10", and 12"

BlockFlash vs. Conventional Through-wall Step Flashing

Benefits

Complete flashing solution requiring no additional components
Lightweight, fast and easy to install
Requires no fasteners or adhesives
Applicable in all CMU wall flashing locations, including base of wall, parapet walls, and above bond beams, wall openings and structural steel members
Cuts labor and material costs associated with using membrane flashing in a multi-wythe course by approximately 50%
Eliminates the need for multiple architectural CMU sizes typical with through-wall flashing
Helps prevent costly call-backs and repairs due to damage caused by moisture in the block cores
Helps protect builders and designers from legal issues resulting from moisture damage
Helps prevent mortar damming and provides multiple pathways for water to flow to the flashing pan and out the weeps
Insect guard prevents damage related to insects entering the wall through the weeps
Maintains 1″ mortar bond between courses and provides a flexural bond strength 10-times stronger than standard through-wall membrane flashing for greater wall integrity
Will not degrade, oxidize, or react with other common building materials
40% pre-consumer recycled content of pans and drainage mat helps with LEED certification
Light weight and compact shape means convenient shipping, handling and storage