Roof jack - Sleeves that fit around the black plumbing waste vent pipes at, and are nailed to, the roof sheeting.

Sub contractor - a general or specialty contractor who works for another general contractor.

Vermiculite - A mineral used as bulk insulation and also as aggregate in insulating and acoustical plaster and in insulating concrete floors.

Bat - A half -brick.

Partition - A wall that subdivides spaces within any story of a building or room.

Concrete board - A panel made out of concrete and fiberglass usually used as a tile backing material.

Sleeve(s) - Pipe installed under the concrete driveway or sidewalk, and that will be used later to run sprinkler pipe or low voltage wire.

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