Fire Rebuild & Reconstruction in West Hills

Fire rebuild and reconstruction in West Hills, CA: keeping water out of a surviving chimney through the crown, flashing and mortar joints.

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A chimney that survived the fire still has to shed water. On a West Hills rebuild, rain reaches a standing chimney at the crown on top, at the flashing along the roofline and through mortar joints that heat may have opened. Each gets a repair or a replacement before the new roof goes on around it.

Crown, cap and flashing

The crown is the sloped cap of mortar or concrete that sheds water away from the flue. Heat cracks it, and a cracked crown lets water into the brick below. We replace damaged crowns and add a metal cap over the flue. At the roofline, step flashing and counterflashing are layered with the new roofing, and a wide chimney gets a small peaked cricket on its high side to divert water around it so none pools behind the brick. The cap is sized to overhang the brick on every side.

Mortar joints and the flue

Heat can crack flue tiles and open mortar joints, and water follows both paths into the house. An engineer decides first whether the chimney is sound enough to keep. If it is, joints are repointed with mortar that matches the original in color and hardness, and the flue gets a stainless liner. If it must come down, the chimney is rebuilt with matching brick so the profile still appears at the roofline, and the new flashing goes in as the brick rises.

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