A/C - An abbreviation for air conditioner or air
A/C Condenser - The outside fan unit of the air
conditioning system. It removes the heat from the freon gas, "turns" the gas
back into a liquid, and pumps the liquid back to the coil in the furnace.
A/C Disconnect - The main electrical ON-OFF switch
near the A/C condenser.
ADA - See Americans with Disabilities Act
Aerator - The round screened screw-on tip of a sink
spout. It mixes water and air for a smooth flow.
Aggregate - A mixture of sand and stone and a major
component of concrete.
Air Space - The area between insulation facing and
interior of exterior wall coverings. Normally a 1" air gap.
Allowance - A sum of money set aside in the
construction contract for items which have not been selected and specified
in the construction contract. For example, selection of tile as a flooring
may require an allowance for an underlayment material, or an electrical
allowance which sets aside an amount of money to be spent on electrical
Americans with Disabilities Act - The Americans with
Disabilities Act which gives civil rights protection to individuals with
disabilities similar to those provided to individuals on the basis of race,
color, sex, national origin, age, and religion. It guarantees equal
opportunity for individuals with disabilities in public accommodations,
employment, transportation, State and local government services, and
Amortization - A payment plan by which a loan is
reduced through monthly payments of principal and interest.
Amperage - See Ampere
Ampere - A unit of electrical current or
volume--see "Voltage." Most homes have an electrical service 'entrance'
package of 125 or 200 amps. Some older homes have 60 or 100 amp 'entrances'.
Amps - See Ampere
Anchor Bolt - Bolt to secure a wooden sill plate to
concrete, masonry floor or wall.
Annual Percentage Rate (APR) - Annual cost of
credit over the life of a loan, including interest, service charges, points,
loan fees, mortgage insurance, and other items.
Appraisal - An expert valuation of property.
Apron - A trim board that is installed beneath a
Architect - One who has completed a course of study
in building and design, and is licensed by the state as an architect. One
who draws up plans and sometimes supervises the construction of homes.
Area Walls - Corrugated metal or concrete barrier
walls installed around a basement window to hold back the earth.
Assessment - A tax levied on a property, or a value
placed on the worth of a property.
Assumption - Allows a buyer to assume
responsibility for an existing loan instead of getting a new loan. The
assumption may have to be approved by the lender.
Astragal - A molding, attached to one of a pair of
swinging double doors, against which the other door strikes.
Attic Access - An opening that is placed in the
drywalled ceiling of a home providing access to the attic. Sometimes found
in halls, closets or garages.
Attic Ventilators - Screened openings in houses to
allow for ventilation of an attic space.
Awning Windows - Single level windows that tilt
outward and up.
Back Charge - Billings for work performed or costs
incurred by one party that, in accordance with the agreement, should have
been performed or incurred by the party to whom billed. Owners bill back
charges to general contractors, and general contractors bill back charges to
subcontractors. Examples of back charges include charges for cleanup work or
to repair something damaged by another subcontractor, such as a tub chip or
Backfill - The replacement of excavated earth into
a trench around or against a basement or crawlspace foundation wall.
Backing - Frame lumber installed between the wall
studs to give additional support for drywall or an interior trim related
item, such as handrail brackets, cabinets, and towel bars. In this way,
items are screwed and mounted into solid wood rather than weak drywall that
may allow the item to break loose from the wall. Carpet backing holds the
pile fabric in place.
Backout - Work the framing contractor does after
the mechanical (heating, plumbing & electrical) subcontractors finish their
phase of work at the rough stage prior to insulating to get the home ready
for a municipal frame inspection. Generally, the framing contractor repairs
anything disturbed by others and completes all framing necessary to pass a
Rough Frame Inspection.
Baffles - Device to help achieve a ventilation
space between insulation and roof sheathing. It helps assure air flow from
the eave vents in attics and cathedral ceilings.
Ballast - A transformer that steps up the voltage
in a florescent lamp.
Balloon - A loan that has a series of monthly
payments with the remaining balance due in a large lump sum payment at the
Balloon Framed Wall - Framed walls (generally over
10' tall) that run the entire vertical length from the floor sill plate to
the roof. This is done to eliminate the need for a gable end truss.
Balusters - Vertical members in a railing used
between a top rail and bottom rail or the stair treads. Sometimes referred
to as "pickets" or "spindles."
Balustrade - The rail, posts and vertical balusters
along the edge of a stairway or elevated walkway.
Band Joist - Vertical member that forms the
perimeter of a floor system in which the floor joists tie in. Also known as
the rim joist.
Barge - A horizontal beam rafter that supports
Barge Board - A decorative board covering the
projecting rafter (fly rafter) of the gable end. At the cornice, this member
is a fascia board.
Barrel Vault - A vaulted ceiling of semi-circular
shape, creating a dome-like appearance.
Baseboard - Any board or molding found at the bottom
of an interior wall.
Basement Foundation - A basement is a usable
foundation that typically has ceiling heights of 8' and is often finished
off as living or storage space.
Bay Window - A window that projects outward in a
Bi-Level - A home that has two levels. Typically, a
garage or storage area is situated in the lower level and the home in the
Board Foot - Measurement of lumber that is the
equivalent of 144 cubic inches.
Bonus Room - A room with no specifically designated
function, unlike a living room, bedroom, or kitchen. Is not included in the
initial square footage.
Bottom Plate - The lowest horizontal member of a
wall which rests on the rough floor, to which the studding is nailed.
Braced Framing - A construction method in two-story
homes in which the frame is reinforced with posts and braces.
Brick Veneer - A vertical facing of brick laid
against and fastened to sheathing of a framed wall or tile wall
Buck - Often used in reference to rough frame
opening members. Door bucks used in reference to metal door frame. See
Builder's Risk Insurance - Insurance coverage on a
construction project during construction, including extended coverage that
may be added for the contract for the customer's protections.
Building Code - A comprehensive set of laws that
controls the construction or remodeling of a home or other structure.
Built-Up Roof - A roofing composed of three to five
layers of asphalt felt laminated with coal tar, pitch, or asphalt. The top
is finished with crushed slag or gravel. Generally used on flat or
Bull Nose Drywall - Rounded drywall corners.
Bundle - A package of shingles. Normally, there are
3 bundles per square and 27 shingles per bundle.
Cantilever - A projecting structure supported on one
end, such as a balcony.
Cavity - The empty space between studs or joists to
place insulation batts.
Central Air Conditioning - A system which uses ducts
to distribute cooling and/or dehumidified air to more than one room or uses
pipes to distribute chilled water to heat exchangers in more than one room,
and which is not plugged into an electrical convenience outlet.
Circuit Breaker - A device which looks like a
switch and is usually located inside the electrical panel or circuit breaker
box. It is designed to (1) shut of the power to portions or all of the house
and (2) to limit the amount of power flowing through a circuit (measured in
amperes). 110 volt household circuits require a fuse or circuit breaker with
a rating of 15 or a maximum of 20 amps. '220' volt circuits may be designed
for higher amperage loads e.g. a hot water heater may be designed for a 30
amp load and would therefore need a 30 amp fuse or breaker. also see GFI
Clerestory - An outside wall of a room or building
that rises above an adjoining roof and contains windows.
Closed Loop - A system in which each component is
connected to the next component with the last component being connected to
the original device. Forms a complete circle.
Coffered Ceiling - A ceiling with recessed square
panels, bordered with trim for ornamental purposes.
Collar Beam - A horizontal tie beam in a roof truss
that connects two opposite rafters at a level considerably above the wall
Concrete Block - A hollow concrete 'brick' often 8"
x 8" x 16" in size. Often used in low rise commercial and some residential
construction. The original design and use is attributed to the architect
Frank Lloyd Wright.
Conduit - A tube or duct for enclosing electric
wires or other cables.
Construction Documents - All drawings,
specifications and addenda associated with a specific construction project.
Cornice - Overhang of a pitched roof, usually
consisting of a fascia board, a soffit and appropriate trim moldings.
Crawlspace Foundation - The space between the ground
and the first floor of a home, usually no higher than four feet.
Crawlspace Vent - An opening to allow the passage
of air through the unexcavated area under a first floor. Ideally there
should be at least two vents per crawlspace.
Cross Bracing - A system of bracing by the use of
ties. Typically used between floor joists to prevent them from twisting.
Crown Molding - A molding used on cornice or
wherever an interior angle is to be covered, especially at the roof and wall
Daisy Chain - A wiring scheme in which device A is
wired to device B, device B is wired to device C, etc. The last device is
normally wired to a switch or circuit breaker.
Dentil - One of a series of small projecting
rectangular blocks forming a molding under an overhang, most common in
Dormer Windows - Dormers are located on the second
floor and project or extend out through the roof to provide window space.
Draw - The amount of progress billings on a contract
that is currently available to a contractor under a contract with a fixed
Drive Under - A style of home where the garage is
located in a basement.
Duct - A rigid metal or flexible insulated tube,
designed to deliver air to and from a furnace or other air-handling unit.
Ductwork - A system of large tubes, pipes or
channels (ducts) designed to deliver air to and from a furnace or other
Eave Vent - Vent opening located in the soffit
under the eaves of a house to allow the passage of air through the attic and
out the roof vents.
Eaves - The projecting overhang at the lower edge of
Egress - A means of exiting the home. An egress
window is required in every bedroom and basement. Normally a 4' X 4' window
is the minimum size required.
Electrical Rough - Work performed by the Electrical
Contractor after the plumber and heating contractor are complete with their
phase of work. Normally all electrical wires, and outlet, switch, and
fixture boxes are installed (before insulation).
Electrical Service Panel - Refers to the
high-voltage electrical system’s first point of entry into a home beyond the
Electricity - Provides power for lighting,
appliances, and heating & cooling in a home. A meter records usage for
billing by your local utility.
Elevations - The exterior view of a home design that
shows the position of the house relative to the grade of the land.
Entry Box - See Electrical Service Entry
Face Staple - Stapling facing flange to the front
side of a stud or rafter, along the 1½" dimension.
Faced Insulation - Insulation with an attached
vapor retarder (kraft paper or foil-backed paper).
Fascia - Horizontal boards attached to rafter/truss
ends at the eaves and along gables. Roof drain gutters are attached to the
Fiber Glass Insulation - An energy-efficient glass
fiber product manufactured by Owens Corning to ensure the best thermal and
noise control performance available.
Flashing - The building component used to connect
portions of a roof, deck, or siding material to another surface such as a
chimney, wall, or vent pipe. Often made out of various metals, rubber or tar
and is mostly intended to prevent water entry.
Flat Ceiling - A ceiling with no change in
Foil-Faced Vapor Retarder - Created by coating a
foil-backed paper with a thin layer of asphalt adhesive. The coated side of
the foil-backed paper is then applied to the unfaced insulation material.
The asphalt adhesive bonds the foil-backed paper and the insulation
Footing - Trenches of poured concrete around the
perimeter of the house and below each pier or column that supports and
distributes the weight of the house to the ground.
Forced Air Heating - A common form of heating with
natural gas, propane, oil or electricity as a fuel. Air is heated in the
furnace and distributed through a set of metal ducts to various areas of the
Framer - The carpenter contractor that installs the
lumber and erects the frame, flooring system, interior walls, backing,
trusses, rafters, decking, installs all beams, stairs, soffits and all work
related to the wood structure of the home. The framer builds the home
according to the blueprints and must comply with local building codes and
Furring Strip - Flat piece of lumber used to build
up an irregular framing to an even surface, either the leveling of a part of
a wall or ceiling.
Fuse - A device often found in older homes designed
to prevent overloads in electrical lines. See Circuit Breakers.
Gable End Wall - The triangular end of an exterior
wall above the eaves formed under a gable roof.
Gable Roof - A roof that consists of two sloping
planes that meet at the ridge or peak. The planes are supported at their
ends by triangular, upward extensions of walls known as gables.
Gable Vent - A louver mounted in the top of the
gable to allow the passage of air through the attic.
GFCI - See Ground Fault Current Interrupter
GFI - See Ground Fault Current Interrupter
Girders - Crossbeams that support floor joists.
Glass Fiber - Glass in a strand form. The
ingredients are essentially the same that go into any glass product such as
a window pane or drinking glass.
Glued Laminated Beam (Glulam) - A structural beam
composed of wood laminations or lams. The lams are pressure bonded with
adhesives to attain a typical thickness of 1 ½" . (It looks like 5 or more 2
X 4's are glued together).
Grade - Ground level, or the elevation at any given
point. Also the work of leveling dirt. Also the designated quality of a
manufactured piece of wood.
Ground Fault Current Interrupter - An electrical
device used to prevent injury from contact with faulty electrical appliances
and faulty wiring - electrical shocks. GFIs should not be confused with AFIs,
the later are designed to prevent electrical fires. GFIs are required in new
home bathrooms, kitchen, garage, out of doors and in other locations where
one might be in contact with a grounded surface or body of water and an
electrical appliance. Most GFI's are located in the receptacle itself or a
curcuit breaker and can be identified by the presence of a 'test' and a
Header - A crossbeam above a window or door.
Heat Pump - A device which uses compression and
decompression of gas to heat and/or cool a house.
High Voltage System - See Electricity.
Hip Roof - A pitched roof with sloping sides.
HVAC - Heating, ventilation and air conditioning.
Ice Dam - A condition which can occur with snow and
freezing conditions. When snow or ice melts on a roof over a heated or
partially heated attic space, the melting water may refreeze over an
unheated areas such as a roof overhang. This re-frozen water may create a
"dam" and allow additional melt water to back up under shingles and cause
leaks (Illustration "A"). Solutions include: proper roof venting and
insulation (Illustration "B"), membrane roofing or roofing underlayment, and
heat tapes. Once an ice dam occurs, remedies are difficult and or dangerous.
Working on a frozen roof should be avoided, as should the use of any open
flames. The use of hot water to melt the ice may help, it may also increase
the amount of leakage.
Inset Staple - Stapling to the inside portion of
the stud or rafter.
Insulated Ceiling (I.C.) - Marking on recessed
lighting fixture indicating that it is designed for direct insulation
Insulation Density - Denser insulation products
have more fibers per square inch and, therefore, give you greater insulating
power through higher R-values.
Interior Finish - Material used to cover the
interior framed areas of walls and ceilings.
Joist - Part of the framing that provides the
structure for a floor. In most homes, floor joists are made of 2x8s or
larger lumber set on edge and spaced 16 inches apart, from center to center.
Knee Wall - A wall-like structure that supports roof
Kraft-Faced Vapor Retarder - Created by coating
kraft paper with a thin layer of asphalt adhesive. The coated side of the
kraft paper is then applied to the unfaced insulation material. The asphalt
adhesive bonds the kraft paper and the insulation together.
KS - Knee space in a cabinet or under a desk.
Lanai - A porch-like room or open-sided living room.
Landing - A platform between flights of stairs or at
the termination of a flight of stairs. Often used when stairs change
direction. Normally no less than 3 ft. X 3 ft. square.
Lap Siding - Slightly wedge-shaped boards used as
horizontal siding in a lapped pattern over the exterior sheathing. Varies in
butt thickness from ½ to ¾ inch and in widths up to 12".
Lath and Plaster - The most common wall finish
prior to the introduction of drywall. Thin wood strips (lath) were nailed
onto the framing as a base for the sand/lime plaster (see diagram).
Living Square Footage - See Square Footage, Living
Load-Bearing Point - A point where a bearing or
structural weight is concentrated and transferred to the foundation.
Load-Bearing Wall - Includes all exterior walls and
any interior wall that is aligned above a support beam or girder. Normally,
any wall that has a double horizontal top plate.
Low-Voltage System - Provides security,
entertainment, communications, environmental control, networking, and other
functions generally powered by a signal cable, phone line or data cable. Is
not typically metered.
Metal Flue - A metal channel through which hot air,
gas, steam or smoke may pass.
Metal Insulation Support - 16" or 24" wire rod or
crisscrossed wire to hold floor insulation in place.
MIRAFLEX® Fiber - A revolutionary soft-to-the-touch
glass fiber insulation developed by Owens Corning for easier handling and
installation. In addition to its virtually itch-free characteristic,
insulation with Miraflex® has extraordinary resiliency allowing it to be
packaged in more convenient, ultra-compact rolls.
Monolithic Slab - A slab foundation that is part of
Mullion - A vertical piece of stone, metal, or wood
that divides the panes of a window, the panels of a screen or the doors of a
Niche - A recess in a wall, usually designed to
contain ornamental statues or other decorations.
Nonbearing Wall - A wall supporting no load other
than its own weight.
Noncombustible - The material will not burn. The
glass fibers in PINK fiber glass insulation have a natural fire resistance,
and are considered non-combustible when tested in accordance to ASTM E136.
Overhang - Part of the roof that hangs over the
Palladian Window - One larger window with a circle
top window above and usually has two smaller, rectangular windows on each
Parging - A rough coat of mortar applied over a
masonry wall as protection or finish; may also serve as a base for an
asphaltic waterproofing compound below grade.
Particle Board - Plywood substitute made of course
sawdust that is mixed with resin and pressed into sheets. Used for closet
shelving, floor underlayment, stair treads, etc.
Partition - A wall that subdivides spaces within any
story of a building or room.
Patio - An interior courtyard or a paved backyard
Pilaster - A projection or the foundation wall used
to support a floor girder or stiffen the wall.
Pitch - The angle of slope of a roof.
Plant Shelf - A decorative feature approximately 8
feet above the floor, normally associated with volume ceilings that add high
spaces/shelves to use for decorative purposes.
Plates - Pieces of wood placed on wall surfaces as
fastening devices. The bottom member of the wall is the sole plate and the
top member is the rafter plate.
Plenum - A chamber which can serve as a
distribution area for heating or cooling systems, generally between a false
ceiling and the actual ceiling.
Plot Plan - An overhead view plan that shows the
location of the home on the lot. Includes all easements, property lines, set
backs, and legal descriptions of the home. Provided by the surveyor.
Pointing - Treatment of joints in masonry by
filling with mortar to improve appearance or protect against weather.
Poly-Wrap - Polyethylene wrap that encloses Owens
Corning MIRAFLEX® insulation, making it comfortable to touch, less likely to
itch and irritate, and easier to handle and install. The poly wrap has tiny
perforations that allow the insulation to breathe and resist the collection
of moisture within the wrap.
Polyethylene Vapor Barrier - Plastic film used to
prevent moisture from passing through unfaced insulation. Both 4- and 6-mil
polyethylene are preferred because they are less likely to be damaged during
Porte-cochère - A porch-like roof extending over a
Portico - A portico (Latin) is a roofed area, open
to the air on one or more sides, typically supported on one side by the
facade of a building and on the remaining sides by columns or arches.
Porticos are common on Federal, Early Classical Revival, Greek Revival, and
other houses of the 18th and 19th centuries. The English word porch is
derived from portico, and is approximately synonymous.
Post-And-Beam - Wall construction in which beams
are supported by heavy posts rather than many smaller studs.
Punch List - A list of discrepancies that need to be
corrected by the contractor.
Quarry Tile - A man-made or machine-made clay tile
used to finish a floor or wall. Generally 6" X 6" X 1/4" thick.
Quarter Round - A small trim molding that has the
cross section of a quarter circle.
R Value - A measure of insulation. A measure of a
material's resistance to the passage of heat. The higher the R value, the
more insulating "power" it has. For example, typical new home's walls are
usually insulated with 4" of batt insulation with an R value of R-13, and a
ceiling insulation of R-30.
Rabbet - A groove cut in a board to receive another
Radiant Heat - A heating system which uses hot
water, steam pipes or electric resistance coils to heat the floors, walls or
the ceilings of a room.
Radius Window - A window with an arched top.
Rafter - One of a series of beams that form the
slope of a pitched roof and are analogous to floor joists.
Rake - Refers to the slope of the roof at the end of
a gable, where the outside part of the overhang forms an upside down V.
Rebar - Ribbed steel bars installed in foundation
concrete walls, footers, and poured in place concrete structures designed to
strengthen concrete. Comes in various thickness' and strength grade.
Red-Lined Prints - Blueprints that reflect changes
and that are marked with red pencil.
Redline - See Red-Lined Prints
Reinforcing Bar - See Rebar
Resilient Channels - Metal channels used to further
inhibit sound transmission through wall and ceiling framing. Create a break
in the vibration path from drywall to the framing.
Ridge Board - A horizontal board that serves as the
apex of the roof structure.
Ridge Vent - A vent mounted along the entire ridge
line of the roof to allow the passage of air through the attic or cathedral
Riser - Vertical boards between the steps of a
Roof Valley - The "V" created where two sloping
Roof Vent - A louver or small dome mounted near the
ridge of the roof to allow the passage of air through the attic.
Scotia - A concave molding.
Seepage Pit - A sewage disposal system composed of
a septic tank and a connected cesspool.
Septic Tank - A sewage settling tank in which part
of the sewage is converted into gas and sludge before the remaining waste is
discharged by gravity into a leaching bed underground.
Shed Roof - A roof that pitches up further on one
side than the other. Shed roofs are also used over some porches.
Shim - Thin tapered piece of wood used for leveling
or tightening a stair or other building element.
Sidelight - A vertical window beside a door or
Siding - See Lap Siding
Slab Foundation - For a slab foundation, the site is
leveled off, and a trench is dug around the perimeter of the home site.
Gravel is then spread across the site, and concrete is poured approximately
four inches thick over wire mesh and a moisture barrier. In areas of load
bearing walls, trenches need to be dug to allow for additional thickness at
this location. Slab foundations have no piers or floor joists, and the
concrete slab is the floor system.
Sleeper - Strip of wood laid over concrete floor to
which the finished wood floor is nailed or glued.
Soffit - The underside of the roof overhang or porch
ceiling that covers the rafter bottoms. This horizontal surface usually has
vents to allow air into the attic.
Sole Plate - See Bottom Plate.
Square Footage, Living - The square footage in a
home that is heated and/or cooled. The space occupied by two-story rooms and
stairwells is counted once in the lower floor's square footage. Living
square footage does not include garages, bonus rooms, or porches unless
Stapling Flange - A protruding edge on faced
insulation used to staple the insulation to the framing.
Stick-Built Home - A house built without
prefabricated parts. Also called conventional building.
Stringer - A long, horizontal member which connects
uprights in a frame or supports a floor or the like. One of the enclosed
sides of a stair supporting the treads and risers.
Stud - An upright piece of lumber or steel in a
wall, to which panels, siding, drywall, or other coverings are attached.
Subfloor - The structural material that spans
across floor joists. It serves as a working platform during construction and
provides a base for the finish floor.
Sump - A pit in the basement in which water
collects to be pumped out with a sump pump.
Take Off - The list of materials necessary to
complete a job.
Top Plate - The horizontal member nailed to the top
of the studding of a wall.
Transom - A small hinged window directly above a
Tray Ceiling - A decorative ceiling treatment used
to add volume and/or height to a room. 2 Common types are: 1) Angled area
toward the center leading to a flat ceiling surface, and 2) Stepped square
edged leading toward the center of the ceiling.
Tread - The flat part of a stair step.
Trombe Wall - A passive solar wall, usually masonry
or concrete, used for passing heat from one room (like a sun room or solar
garden room) to another.
Truss - A prefabricated framework of girders, struts
and other items used to support a roof or other load-bearing elements.
Turnkey - A term used when the subcontractor
provides all materials (and labor) for a job.
Unfaced Insulation - Insulation with no attached
Vapor Retarder - Helps control the amount of
moisture passing through the insulation and collecting inside exterior
walls, ceilings and floors.
Vaulted Ceiling - A ceiling that angles upward on
one or both sides to create volume in the room.
Veneer - Extremely thin sheets of wood. Also a thin
slice of wood or brick or stone covering a framed wall.
Ventilation - Creates a positive flow of air that
allows the house to "breathe" and helps prevent moisture build-up
Wafer Board - A manufactured wood panel made out of
1"- 2" wood chips and glue. Often used as a substitute for plywood in the
exterior wall and roof sheathing.
Walk Through - A final inspection of a home before
"closing" to look for and document problems that need to be corrected.
Wall Out - When a painter spray paints the interior
of a home.
Widow's Walk - A platform with a rail around it,
built onto the roof of a house. The platform is accessible by stairs or a
ladder from the interior of the house.
Window Buck - Square or rectangular box that is
installed within a concrete foundation or block wall. A window will
eventually be installed in this "buck" during the siding stage of
Window Sash - The operating or movable part of a
window; the sash is made of window panes and their border.
Wire Nut - A plastic device used to connect bare
Y - A "Y" shaped plumbing fitting.
Yard of Concrete - One cubic yard of concrete is 3'
x 3' x 3' in volume, or 27 cubic feet. One cubic yard of concrete will pour
80 square feet of 3 ½" sidewalk or basement/garage floor.
Yoke - The location where a home's water meter is
sometimes installed between two copper pipes, and located in the water meter
pit in the yard.
Z-Bar Flashing - Bent, galvanized metal flashing
that is installed above a horizontal trim board of an exterior window, door,
or brick run. It prevents water from getting behind the trim/brick and into
Zero-lot line - The positioning of a house near or
on top of the lot boundary, resulting in little or no space between houses.
Zone - The section of a building that is served by
one heating or cooling loop because it has noticeably distinct heating or
cooling needs. Also, the section of property that will be watered from a
lawn sprinkler system.
Zone Valve - A device, usually placed near the
heater or cooler, which controls the flow of water or steam to parts of the
building; it is controlled by a zone thermostat.
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