Drywall and Plaster Flashcards
What penetration are face layer sheetrock fastners, GWB-54, required by code to provide?
3/4”
what causes cracking or wrinkling at taped edges of drywall?
Very rapid drying
where should the first nails be spaced in the double nailing method for attaching sheetrock board to wood framing
12” OC along the supports in the field of the shootrock
what type of lath is used as the plaster base, when plastering ceilings in garages?
metal
three coat work requires
a finish coat
a brown coat
a scrath
for what period of time must the scratch coat be cured?
not less than 48 hours
how is chicken wire ordered
by the roll
the lath used for a plaster finish is
metal
gypsum
insulating fiberboard
which of the following has the greatest insulating value
insulating fiberboard
stucco adheres best to which of the following
wire lath
over which types of bases may portland cement plaster be applied
wire
masonry
gypsum is what type of lath
mineral lath
gypsum mortar sets
faster than lime mortar
metal lath is usually applied with the long dimension of the sheet in a
horizonatl direction
what is the principle binder in gypsum products
lime
metal lath is ordered by the bundle. How many peices are in a bundle
12
what is an advantage of plaster acoustical ceilings over other acoustical ceilings?
its fire resistance
which are teh best nails for drywall
annular ring
how many pounds of nails should be ordered if you need 2500 for a job plus a 10% allowance, if the nails come 150 to the pound
19
the nails should be placed no more than how far on center, when installing drywall on a ceiling
7”
the nails should be placed no more than how far on center, when installing drywall on sidewalls
8”
what does the term drywall most usually refer to
gypsum wall board
ridging refers to
conspicouls wrinkling of joint tape and treated joints
usually drywall shuld first be installed
on the ceilings
what is the recommended head diameter for drywall nails
19/64”
which of the following statements is false
in perpendicular installation, the short side of the drywall is attached perpendicular to the studs
Which of the followign is the best hammer for drywall
concave
how do you get a clean cut on drywall
first score the front
what is the most important advantage of installing drywall with screws
it holds more securely
the panels should be applied within how many minutes of the application of the adhesive nail on application
15
what are the two basic nailing patterns in general use for drywall
single and double
what is the basic cause of nail pops
wood shrinkage
before the first coat of drywall compound is applied, the entire installation must be checked for
defective joints
loose boards
poorly driven nails
what will a skim coat of tape compound help prevent happening to drywall taped edges
cracking
joints in wallboard should be
loosely butted together
what are the 3 stucco coats
scratch
brown
finish
the term portalnd cement plaster applies to
stucco
stucco work is estimated by what unit of measure
square yard
when ceramic tile more than 3/8 inch thick is applied over water resistant gypsum board, fasten the board with screws or nails spaced not more than
4 inches oc
slightly crooked ceiling joists are sometimes straightened by the use of a
strong back
When the wall is greater than ____ gypsum board is installed vertically
8’1”
what are the most popular standard gypsum board lenths
8,10,12 and 16 feet
when fastening drywall, minimum penetration of ring shanked nails into the framing member is
3/4 inch
when applying the paper covered edge of water resistant gypsum board, it should be not less than ____ inch above the lip of the tub or shower pan
1/4
joints in the face layer of a multilayer application are offset from joints in the base layer by at least
10 inches
what is the width of standard gypsum board
48 inches
nails are spaced a maximum of ____ in the single nailing method
8 inches OC on walls, 7 inches OC on ceiling
screws are spaced
16 inch OC on walls, 12 inches OC on ceilings
how many inches should weep screed be placed above the earth
6
wood supports for drywall shall not be less than ____ inches nominal in the least dimension
2
how many days should there be between scratch and brown coat, when applying partland cement plaster
2
how many inches oc should the maximum spacing of supports for NO17 gauge woven wire fabric lath on vertical hollow metal studs
16
when installing a suspended ceiling you should first
make a drawing of the ceiling
when locating joists above an existing ceiling, you should
use a hammer to tap on the ceiling until you hear a dull thud
if you have a wall with studs spaced 16 inches on center with a 1/2 inch thick drywall installed parallel to the studs, the nailing should be ____ nails spaced 2 to 2-1/2 inches apart with pairs spaced 12 inches apart except at the perimeter of the sheet
2
interior metal lath shall be lapped not less than ____ inches at the sides and 1 inch at the ends
1/2
metal stud or wood frame construction with a slab on grade floor shall have exterior plaster applied so that it does not extend below the
lath and paper
hangers supporting a 16 sq ft area of a suspended ceiling that weighs 5 pounds per sq ft shall be No. ____ guage wire
8
staples used to fasten the base ply of a two ply drywall installation shall be
No 16 guage
which of the following measurements should be used when squaring a room
3,4 and 5 feet
how many inches thick should the finish coat of interior plaster be
1/16
suspension wire is used to hand____ in suspended ceiling
main runners
what are the most common sizes in inches of ceiling tile
12x12 and 12x24
when fastening 12” x 12” tiles you must use
4 staples
the minimum length of a screw used to fasten the face layer of a double 5/8 inch thick drywall assembly on wood framing shall not be less than ____ inches long
1-7/8
Screws used for attaching 3/8 inch metal rib lath shall penetrate wood framing not less than
5/8
nails used for fastening furring to ceiling joists must penetrate into the joists at least
1 inch
gypsum wall board shall not be installed
without weather protection
what is the width in inches of border tiles for a room measuring 14’9” x 22’-3”
10-1/2 and 7-1/2
what is the width in inches of 24” x 24” border tiles for a room measuring 12’6” x 18’8”
15 and 16
Rebound material from gunite may be reused as sand in an amount not greater than what percent of the total sand in an batch
25
how many inches thick should gypsum plaster be when measuring from the back plane of expanded metal lath
7/8
how many inches OC should the face layer be nailed when two layers of 5/8 inch thick gypsum wallboard are attached parallel to joist spaced 24 inches OC
This is not allowed
how many inches in nominal thickness in the least dimension should suspended wood systems be, with the exception of furring strips not less than 1 inch that may be used over solid backing
2
how many days should there be between the second and finish coat, when applying exterior portland cement plaster
7
what is the minimum inches that the overall thickness of exposed aggregate plaster should be
7/8
when attaching 1/2 inch thick gypsum board to wood framing in single layer installations, how many inches should long screws be
1-1/8
