NCCER Floor Covering flashcards
NCCER Floor Covering · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Resilient flooring
- A floor covering that recovers from indentation, including vinyl sheet and tile, linoleum, rubber, cork, and VCT.
- Tufted carpet
- Carpet made by punching yarn through a primary backing and locking it with a secondary backing; the most common carpet construction.
- PEI wear rating
- A tile wear scale from I to V, where I is no foot traffic and V is heavy commercial; used to match tile to use.
- Laminate flooring
- A floating composite floor with a wear layer, printed decor layer, HDF core, and backing; it is not solid wood and usually cannot be refinished.
- Engineered wood flooring
- A floor with a plywood core and a real wood veneer top; it has limited refinishing life compared with solid wood.
- Fall protection threshold
- OSHA 29 CFR 1926 Subpart M requires fall protection at 6 ft or more in construction, including open edges and shafts.
- Silica dust control
- Cutting concrete or tile releases carcinogenic silica; OSHA 1926.1153 requires wet cutting or dust collection and may require a written exposure plan.
- SDS requirement
- Safety Data Sheets must be on site for each chemical, and workers must be trained on hazards under OSHA Hazard Communication.
- Knee pad use
- Knee pads or kneeling boards reduce cumulative trauma from prolonged kneeling on hard substrates, an ergonomic hazard in flooring work.
- Concrete flatness tolerance
- Resilient flooring typically requires 1/8 in. in 10 ft flatness, checked with a 10-ft straightedge; some products allow 3/16 in.
- ASTM F2170
- An in-situ relative humidity test for concrete slabs; results are compared with the adhesive and flooring manufacturer's moisture limit.
- ASTM F1869
- A calcium chloride test that measures concrete moisture vapor emission rate, typically limited to 3 lb/1000 sq ft/24 hr.
- CSP surface profile
- The ICRI Concrete Surface Profile scale from 1 to 10; CSP 3-5 is typical for adhesive bonding of resilient flooring.
- Wood subfloor moisture
- Wood subfloor moisture content should be within 2-4% of the flooring's moisture content before installation, checked with a moisture meter.
- Stretch-in carpet method
- Carpet installed over tack strip and cushion and stretched with a power stretcher; required for rooms over about 30 ft.
- Tack strip
- Wood strip with angled pins nailed around the perimeter; carpet is stretched over it and tucked into the gully.
- VCT installation
- Vinyl composition tile set in pressure-sensitive or hard-set adhesive, then rolled with a 100-lb roller after adhesive flash-off.
- Thin-set mortar
- A cementitious adhesive applied with a notched trowel for ceramic and porcelain tile; notch size depends on tile size.
- Floating floor
- A floor not fastened to the subfloor, such as laminate or some wood, requiring a perimeter expansion gap and transition profiles.
- 3-4-5 squaring method
- A layout method using a 3-ft and 4-ft leg with a 5-ft diagonal to establish a 90-degree corner; scale up for larger rooms.
- Carpet waste factor
- Add 10-15% to carpet quantity for waste, more for patterned carpet with a match; carpet is estimated by the square yard.
- Tile waste factor
- Add 10% waste for field tile and 15-20% for diagonal or mosaic layouts to account for cuts and breakage.
- Adhesive coverage
- The square feet per gallon stated on the product label; divide total area by coverage and round up to full containers.
- Change order
- A signed document recording scope, cost, and schedule changes; work should not proceed until it is signed.
- Pile direction
- The orientation of carpet pile; all rolls in a room should run the same direction to avoid shading differences at seams.
- Adhesive open time
- The period after spreading adhesive during which flooring must be laid; exceeding it causes poor bond and requires re-spreading.
- Subfloor deflection limit
- Ceramic tile typically requires L/360 or stiffer and stone often L/720; verify with the tile manufacturer and joist span tables.
- Confined space entry
- Crawl spaces and subfloor voids may require atmosphere testing and permit-required confined-space procedures when triggered.
- Heat-welded seam
- A seam in sheet vinyl or linoleum made by routing a groove, inserting welding rod, and trimming flush after cooling.
- Carpet tile quarter-turn
- A carpet tile layout where each tile is rotated 90 degrees from its neighbor, hiding seams; common in commercial installations.
- Crack isolation membrane
- A membrane per ANSI A118.12 that isolates substrate cracks from tile; uncoupling membranes decouple tile from substrate movement.
- As-built drawings
- Drawings that record actual installed conditions; they are part of project closeout along with warranties and attic stock.