Keystone Flashing System

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  • The Keystone Flashing System
  • The Keystone Flashing System is a total approach to permanently protect masonry structures against water damage.

Photo Captions:

1. Thru-Wall in parapet walls with factory mitred corner.

2. Two-piece cap to counterflash at roof with 4" in-wall receiver.

3. Thru-Wall at Spandrels – to prevent seepage into roof insulation.

4. Thru-Wall at Window Heads and Spandrels – extend flashing to within 1/2" of exterior wall face.

5. Thru-Wall at Spandrels – custom formed to fit conditions with hook dam to prevent seepage into interior space.

6. Thru-Wall at Sills – 3/16" high saw tooth ribs bond in all directions with mortar bed.

7. Thru-Wall at Water Table – saw tooth ribs with 3" spacing provides positive exterior weepage.

  • "Life of the Building" moisture protection is provided at modest installed costs. 

  • Keystone’s famous "3-way" Thru Wall Flashing mechanically bonds in the masonry joint in all directions.

  • Keystone’s versatile "2-piece" Cap Flashing is a combination of either 3-way keyed thru-wall,
    or flat receiver and cap flashing insert.

  • Most pre-fabricated sections are installed in a bed of mortar and interlocked. Where unexpected irregularities are encountered,
    the soft nature of the metal and the flashing design allows the sections to be shaped to fit without violation of its moisture tight
    integrity. A normal mortar joint will accommodate all the sections of Keystone Flashing.

  • These flashing components are a metal system whose sections are soft enough to bend and give, yet tough enough to
    successfully resist moisture penetration for generations.                                             

 

 

Home ] Up ] [ Keystone Flashing System ] Two-Piece Cap Flashing ] 3-Way Thru-Wall Flashing ] Install 3-Way Interlocking Thru-Wall Flashing ]

Two Piece Cap Flashing Specifications

Cap flashings in walls where flat roofs abut shall be two piece type as manufactured by Keystone Flashing Co., Philadelphia,
PA. Receiver shall be formed of (gauge/material) with a special vertical locking slot that requires no malleting or bending to
hold the insert member in place. Combination receivers and thru-wall flashing shall have 3/16" high undercut sawtooth ribs at 3"
intervals to provide a mechanical bond in the mortar bed in all three directions. The insert members shall be formed of
(gauge/materials) and designed to snap lock into the receiver portion and provide a spring like hug against the base flashing.
Thru-wall receivers shall be set with a thin bed of mortar below and above. Install counter flashing insert members with end
joints lapped 3".

3-Way Thru-Wall Flashing Specifications

Cap flashings in walls where flat roofs abut shall be two piece type as manufactured by Keystone Flashing Co., Philadelphia,
PA. Receiver shall be formed of (gauge/material) with a special vertical locking slot that requires no malleting or bending to
hold the insert member in place. Combination receivers and thru-wall flashing shall have 3/16" high undercut sawtooth ribs at 3"
intervals to provide a mechanical bond in the mortar bed in all three directions. The insert members shall be formed of
(gauge/materials) and designed to snap lock into the receiver portion and provide a spring like hug against the base flashing.
Thru-wall receivers shall be set with a thin bed of mortar below and above. Install counter flashing insert members with end
joints lapped 3".

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Copyright © 1999 Keystone Flashing Company, Inc.