Interior Building Materials and Finishes Flashcards
The most used materials for partitions
gypsum wallboard
lath & plaster
masonry
gypsum wallboard
- 4’ sheets at 8’, 10’, 12, and 14’ lengths
- 5/8” thick (comm) or 1/2” thick (res)
- tapered edges most common
- Level 0 - no taping finishing or accessories
- Level 1 - taped edges, used for plenums and non viewable areas
- Level 2 - used where tile backerboard will be placed or appearance is not critical
- Level 3 - same as level 2 but two coats of compound used. used for textured wall finishes, wallpaper
- Level 4 - 3 coats of compound, light textures or wallcoverings, no gloss or semi gloss
- Level 5 - skim coat of compound, gloss and semi gloss paints okay.
standard depths of steel studs
1 5/8, 2 1/2, 3 5/8, 4, and 6
Lath and Plaster
plaster - finish material made from various types of cementing compounds, fine aggregate, and water
two types of plaster construction:
1. metal lath attached to wood or metal studs
2. special gypsum board for plaster
demountable partitions
a system of individual components that can be quickly assembled, disassembled, and reused with nearly total salvageability
Float glass
the standard type of glass used in common windows and other applications where additional strength or other properties are not required
tempered glass
produced by subjecting annealed glass to a special heat treatment. 4x stronger than annealed glass. cannot be cut drilled or deeply etched
laminated glass
consists of two or more layers of glass bonded together by an interlayer of plyvinyl butryal.
Wire glass
has a mesh of wire embedded in the middle of the sheet
fire rated doors
1 hour rated wall = 20 min rated door
1 hour occ. sep = 3/4 hour rated door
1 hour exit stair = 1 hr rated door
types of molding
crown molding base molding casing trim panel trim chair rails base shoes
Formula for stairs (risers and treads)
2R+T=25”
3 basic qualities of sound
velocity
frequency
and power
dB change in intensity
20 - whisper 50 - average conversation 70 - average street noise 120 - hard rock band 140 - jet plane taking off
A healthy young person can hear sounds from 20-20,000Hz
2 problems in containing noise
preventing or minimizing the transmission of sounds from one space to another and reducing the noise within a space
STC
Sound Transmission Class - used to rate the transmission loss of construction
25 - normal speech can be heard through barrier
35 - loud speech is not understood but heard
46-50 - loud speech not heard, loud sounds may be heard faintly
coefficient of absorption
the ratio of the sound intensity absorbed by the material to the total intensity reaching the material
noise reduction within a space
avoid hard, reflective surfaces on walls
avg. absorption coeff. should be at least 0.20
ceiling treatments for sound is best for large rooms, as wall treatments is best for small rooms
3 ways to control sound in a room
reduce the level of loudness of the sound source
modifying the absorption in the space
introducing nonintrusive background sound to mask the unwanted sound
room planning for noise
place similar areas near each other
use buffer spaces to separate noise-producing spaces
stagger doorways
NRC, SRA, and CAC
noise reducing coefficient - single number rating of the avg. sound absorption of a material over a limited frequency range
SRA - Speech range absorption
CAC - ceiling attenuation class
Wood flooring
4 types:
1. strip flooring - most common, strips of varying lengths with tongue and groove edges
2. plank flooring - same as strip but wider for larger scale
3. block flooring - preassembled wood flooring (parquet)
4. end grain block
wood flooring laid on plywood or sleepers
Carpet
rugs
sheet carpet - comes in 12’ wide rolls
carpet tiles - 18” square
Tile
ceramic tile - thin, made from clay, glazed or unglazed,
quarry tile - glazed or unglazed, 6” area
ceramic mosaic - dust pressed or extrusion method, 1/4-3/8” thick
porcelain - made from clay, sand and water, lighter in color, more durable, less susceptible to freezing and thawing
Laminate Flooring
variation of plastic laminate, can resemble wood, tile or stone
hard, durable, easy to install
COF
coefficient of friction, used to evaluate and specify the slip resistance of floor surfaces.
ranges from 0-1 (higher means less slippery)
static coefficient - resting position
dynamic coefficient - two surfaces are in relative motion
Paint
composed of:
binder - gives paint film integrity and holds particles of pigment together
pigments - finely ground natural or synthetic insoluble material that gives paint its color
liquid - keeps the paint fluid until it dries
additives - added to the paint to impart certain
attributes (mildewcides, rheology modifiers, surfactants, defoamers)
VOCs
Volatile organic compounds - hydrocarbon solvents usedin paints, stains, and other products that are released into the air during application and react with nitrous oxide and sublight to form ozone, the same product caused by automotive exhaust and other pollutants
wallpaper
typically 20 1/2" w x 21' long pattern repeat (straight match or drop match) vinyl wallcovering - durable, easy to clean, type I, II, or III. fabric wallcovering - wool, silk or synthetics, upholstered walls,
