|
A |
B | C | D
| E | F |
G | H |
I | J |
K | L |
M | N |
O | P |
Q | R |
S | T |
U | V |
W | X |
Y | Z
Damper
A mechanical device used with heating
systems to regulate the movement of air
through vent piping or supply ducts.
Damper
In a fireplace, a metal plate that closes
the throat when the fireplace is not in use.
Dead load
The weight of a structure itself, its
sheathing and wall coverings, and other
integral components.
Deadman
In a tie-back, a cross piece spiked to
the anchor post at the end in the soil, used
to anchor a wooden retaining wall to the soil.
Deadman
In a tie-back, a cross piece spiked to
the anchor post at the end in the soil, used
to anchor a wooden retaining wall to the soil.
Deck
An independent structure or platform that
is attached to the house.
Deck
An independent structure or platform that
is attached to the house.
Decorative fireplace
A false fireplace designed to
imitate the look of a real fireplace.
Dedicated circuit
A circuit provided for the sole
use of a large appliance such as the
refrigerator or dishwasher.
Delamination
A deterioration process during which the
layers in the laminated plywood
panel begin to separate.
Delamination
A deterioration process during which the
layers in the laminated plywood
panel begin to separate.
Desulfovibrio bacteria
Bacteria that live in hot water
in the presence of magnesium,
causing hot water to smell like rotten eggs. Can contaminate water
heaters.
Desulfovibrio bacteria
Bacteria that live in hot water
in the presence of magnesium,
causing hot water to smell like rotten eggs. Can contaminate water
heaters.
Detachment
With veneer or stucco wall cladding, the
separation of the siding material from
its attachment to the house.
Detachment
With veneer or stucco wall cladding, the
separation of the siding material from
its attachment to the house.
Dielectric connector
A type of connector used between
two dissimilar metal pipes that
prevents metal-to-metal contact between the pipes and stops the flow of
electricity along the
pipes.
Dip tube
In a water heater, the tube that sends
cold water to the bottom of the tank.
Dip tube
In a water heater, the tube that sends
cold water to the bottom of the tank.
Dormer
A structure built out from the roof slope
having its own roof and walls.
Double course
An application of wood shingles or shakes
where an undercourse, not
exposed to the weather, is covered completely by a top course.
Double course
An application of wood shingles or shakes
where an undercourse, not
exposed to the weather, is covered completely by a top course.
Double hung window
A window with two sashes which
both move.
Double hung window
A window with two sashes which
both move. Eave The overhang or
lower portion of the roof that extends beyond the outer wall.
Double hung window
A window with two sashes which
both move. Eave The overhang or
lower portion of the roof that extends beyond the outer wall.
Double tapping
Adding wires at fuses or breakers for the
purpose of adding more circuits
to the electrical system. Not allowed, except with breakers approved for
double tapping.
Downspout
The vertical piping connected to gutters
that carries rainwater from the roof to
the ground.
Draft air
The air required to insure discharge of
exhaust gas from a heating system through
the flue.
Draft diverter
A device built into a furnace that
protects the heating system from excessive
updrafts and chimney downdrafts.
Draft hood
A device on top of a boiler that
Draft hood
A device on top of a water heater that
prevents backdrafts from the chimney
sending exhaust gases into the home.
Draft hood
A device on top of a water heater that
prevents backdrafts from the chimney
sending exhaust gases into the home.
Drain pipes
Any discharge pipes in the DWV system.
Drain pipes
Any discharge pipes in the DWV system.
Drain tile
Flexible, perforated plastic piping used
in footing drains.
Drain valve
On a water heater, a valve at the base of
the tank used to drain water.
Drain valve
On a water heater, a valve at the base of
the tank used to drain water.
Drain, waste, and vent system
Piping that carries water
and waste from home's fixtures
to the sewer or septic system. Abbreviated DWV.
Drip edge
A flashing laid at the eaves and rakes to
direct water flow into the gutters or off
the roof.
Drip loop:
Slack in electrical wires at the masthead
which prevent water from running into
the conduit.
Drum trap
A canister-shaped unvented trap used
under fixtures such as bathtubs and
laundry sinks.
Dry base boiler
A boiler with the heat exchanger set
above the combustion chamber.
Dry laid
A stone foundation laid stone upon stone
without mortar or footings.
Dry vent
A vent in the home's DWV system that
carries only air and water vapor.
Drywall
A premanufactured plaster sheet covered
with paper, used as a wall and ceiling
facing.
Drywell
A buried gravel pit that accumulates
water and allows it to seep into the ground
slowly.
Drywell
A buried gravel pit that accumulates
water and allows it to seep into the ground
slowly.
DWV
See Drain,
waste, and vent system. |