Copper Chimney Counter Flashing

Not only will it prevent leaks but it will also extend the life of your chimney s masonry.

Copper chimney counter flashing.

Begin by marking the stock with a nail or a. Underbend the flashing pieces so that. The primary flashing the step flashing built into each course of roofing materials is best not connected directly to the counter flashing materials. Chimney flashing kits are normally composed by 3 parts.

Sections of l shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney. The counter flashing extends from the layer of bricks and then bends down overlaying the top edges of the primary step flashing. Counter cap flashings bottom the bottom cap flashing or counter flashing is a single piece of metal that covers the vertical portion of the base flashing. Use a hammer and a dull punch to mark the various bends on both ends of the stock.

Such a system usually consists of copper counterflashing and base flashing in conjunction with roof composition flashing or coping. The installation of counter flashing against a chimney works together with the base and step flashing to form a waterproof system for your roof. Proper flashing around a chimney includes two layers. Cap flashings should be fastened to the chimney only.

Counter flashing is the final layer of a three part waterproof barrier installed between a roof and a vertical wall or chimney. The counterflashing diverts water to the base flashing which in turn diverts it to the composition flashing. Although i ve made up hundreds of these custom chimney flashing kits for as little as 20 sq for 20oz copper counter flashing as indicated by the final weight plus freight if you are not local to us. The term reglet flashing refers to an installation method for counter flashing not a separate layer.

The first two layers are called base flashing and step flashing. There are a couple good reasons. Step 1 cut the mortar joint. Copper flashing is used wherever a wall intersects a roof.

To learn more about copper flashing please check out. All you need to complete this project are a few tools and a little know how. Water sheds from off the brick chimney surfaces down over the outside edge of the step flashing. Kits made from copper lead coated copper freedom gray and tcsii are always soldered while aluminum parts are riveted and can be sealed before installation.

Next comes the counterflashing. A second layer of metal is embedded in the chimney mortar joints and folded down to cover the top of the step flashing. Copper generally comes in 3 ft wide by 8 ft long sheets. In good quality work the top is bent and set 1 to 11 2 inches into a mortar joint reglet.

The first is called step flashing.