CSLB C-15 Flooring and Floor Covering (Trade Exam) — All Questions

On a plan drawn at 1/2 inch = 1 foot, a wall measures 7-1/4 inches. How long is the wall?

• a.7-1/4 feet
• b.14.5 feet✓
• c.29 feet
• d.58 feet

At 1/2 inch = 1 foot each inch of paper is 2 feet, so 7.25 × 2 = 14.5 feet. Twenty-nine feet is the result at the 1/4-inch scale, 58 feet the result at the 1/8-inch scale, and 7-1/4 feet ignores the scale entirely.Armstrong F-5061 Ch. 11 (blueprint scales)

A room is 12 feet by 9 feet 9 inches. What is its floor area?

• a.108 ft²
• b.117 ft²✓
• c.116.4 ft²
• d.129 ft²

Nine feet 9 inches is 9.75 feet, and 12 × 9.75 = 117 square feet. 116.4 comes from reading 9 ft 9 in as 9.7 feet, treating inches as tenths. 108 drops the 9 inches. 129 multiplies 12 by 10.75, misreading the width as 10 feet 9 inches.NIST Handbook 44 App. C (units)

How many square yards of carpet cover a 15 ft × 21 ft room, before any waste or seaming allowance?

• a.31.5 yd²
• b.315 yd²
• c.35 yd²✓
• d.40 yd²

15 × 21 = 315 square feet, and 315 ÷ 9 = 35 square yards. 315 is the square-foot figure, never converted. 31.5 divides by 10 instead of 9. 40 is too high for the bare area and does not come from the room's dimensions.NIST Handbook 44 App. C (9 ft² = 1 yd²)

A bedroom 16 ft long and 11 ft 4 in wide is carpeted in one piece from a 12-foot roll. With 3 inches of trim at each end wall, how many square yards are purchased?

• a.20.1 yd²
• b.22 yd²✓
• c.21.3 yd²
• d.16.5 yd²

The cut is 16 ft plus 3 inches at each end, 16 ft 6 in, by the 12-foot roll width: 16.5 × 12 = 198 ft², or 22 yd². 20.1 is the bare room area. 21.3 uses the 16-foot length with no trim. 16.5 is the cut length in feet, not square yards.CRI 105 §5.3 (trim allowance); NIST HB 44

A kitchen 9 ft 9 in long and 11 ft 6 in wide gets non-patterned 6-foot sheet in two lengthwise strips. With Armstrong's fitting allowance, what is the estimate?

• a.12.5 yd²
• b.26.7 yd²
• c.13.3 yd²✓
• d.20.0 yd²

Each strip is 9 ft 9 in plus 3 inches, 10 feet, so two strips total 20 lineal feet, and 20 × 2/3 = 13.3 yd². 12.5 is the bare room area in square yards. 20.0 is the lineal footage, not square yards. 26.7 doubles the area by counting each strip as 12 feet wide.Armstrong F-5061 Ch. 11 (strip method, 2/3 yd² per lineal ft)

A sheet with a 36-inch match is seamed without reversing edges. The first piece is cut 10 ft 3 in. How long is the second piece?

• a.10 ft 3 in
• b.13 ft 3 in
• c.11 ft 0 in
• d.12 ft 0 in✓

For edges not reversed, cut the room size plus 3 inches plus the next multiple of the match; multiples of 36 inches are 9, 12, 15 feet, so the next one at or above 10 ft 3 in is 12 feet. 13 ft 3 in adds a full match, the reversed-edge rule. 10 ft 3 in leaves nothing for alignment. 11 ft is not a multiple of 36 inches.Armstrong F-5061 Ch. 11 (patterned sheet, non-reversed)

Under Armstrong's waste guide, how much resilient tile should be estimated for an 80-square-foot room?

• a.91.2 ft²
• b.84 ft²
• c.80 ft²
• d.88 ft²✓

An 80 ft² room falls in the 50–100 ft² band at 10 percent, so 80 × 1.10 = 88 ft². 91.2 uses the 14 percent figure for rooms up to 50 ft². 84 uses 5 percent, meant for 300 to 1,000 ft². 80 leaves no fitting waste.Armstrong F-5061 Ch. 11 (tile waste table)

How much tile should be estimated for a 1,200-square-foot area using Armstrong's waste guide?

• a.1,236 ft²✓
• b.1,212 ft²
• c.1,296 ft²
• d.1,260 ft²

Areas of 1,000 to 5,000 ft² carry 3 percent waste, so 1,200 × 1.03 = 1,236 ft². 1,260 uses 5 percent, the 300–1,000 ft² band. 1,212 uses 1 percent, below the stated band. 1,296 uses 8 percent, a small-room figure.Armstrong F-5061 Ch. 11 (tile waste table)

A 600-square-foot solid wood floor is installed on the diagonal. Using one solid-wood manufacturer's purchase allowances, how much flooring should be bought?

• a.630 ft²
• b.690 ft²✓
• c.600 ft²
• d.660 ft²

The manufacturer adds 5 percent for cuts and an additional 10 percent for a diagonal installation, 15 percent in all: 600 × 1.15 = 690 ft². 630 adds only the 5 percent cutting allowance. 660 adds only the diagonal 10 percent. 600 adds nothing.Manufacturer installation instructions (solid hardwood, purchase allowance)

A patch is labeled "25-pound bag – 38 sq. ft. at 1/8 inch thick." How many bags are needed to fill 76 square feet at 1/4 inch?

• a.2 bags
• b.4 bags✓
• c.3 bags
• d.8 bags

Doubling the thickness halves the coverage to 19 ft² per bag, and 76 ÷ 19 = 4 bags. Two bags is the count at 1/8 inch. Eight bags doubles the correct answer. Three bags covers only 57 ft² at 1/4 inch.Armstrong F-5061 Ch. 3 (patch coverage)

A 6-foot roll has a 4-inch core, a 16-inch outside diameter and 30 laps. Using Armstrong's quick-inventory formula, about how many square yards does it hold?

• a.78.6 yd²
• b.600 yd²
• c.52.3 yd²✓
• d.41.9 yd²

The formula adds core and outside diameters (20 inches), multiplies by the laps (600) and by 0.0872, giving 52.3 yd². 41.9 uses only the outside diameter. 78.6 multiplies by 0.131, which gives lineal feet, not square yards. 600 is the intermediate product before the factor.Armstrong F-5061 Ch. 11 (quick inventory)

A cross seam cannot be avoided in a patterned sheet. How much extra material does Armstrong add to each piece to be cross seamed?

• a.Exactly one full repeat
• b.More than half the repeat✓
• c.Nothing beyond the room length
• d.Three inches, as for a plain strip

Armstrong adds slightly more than half the length of the design repeat to each piece to be cross seamed. One full repeat on each piece doubles the needed material. Three inches is the fitting allowance, not a match allowance. Adding nothing leaves no way to match the pattern.Armstrong F-5061 Ch. 11 (cross seams)

Which document does Armstrong say details what protection the floor must have after installation?

• a.The specification book✓
• b.The building's site plan
• c.The adhesive container label
• d.The room finish schedule

Armstrong tells estimators to read the specification book, which details materials, installation and the protection required afterward. The finish schedule shows which floor goes in which room. An adhesive label covers that product's use. A site plan shows the building on the lot.Armstrong F-5061 Ch. 11 (reading blueprints)

An estimator receives room dimensions measured by someone other than the dealer. What does Armstrong advise?

• a.Ask the measurer to sign the sheet
• b.Reduce the estimate by 10 percent
• c.Allow for inaccuracies✓
• d.Use the numbers exactly as given

Armstrong says that if anyone other than the dealer measured the job, the estimator should make allowances for inaccuracies. Using the figures unchanged ignores that advice. Cutting the estimate makes a shortfall more likely. A signature does not correct the figures; Armstrong checks both sides and both ends of a room instead.Armstrong F-5061 Ch. 11 (measuring)

In a building that is not sprinklered, what minimum floor finish class does the 2025 California Building Code require in a Group B corridor?

• a.Class II✓
• b.No class is required
• c.Class III
• d.Class I

The code requires corridor floor finishes to be not less than Class II in Groups A, B, E, H, I-4, M, R-1, R-2, R-2.2 and S. Class I is required in Groups I-2 and I-3 areas without restraint and R-2.1, not B. There is no Class III in this section. A corridor is exactly where the code requires a class.2025 CBC §804.4.2

Carpet will be installed on an accessible route. What does the accessibility standard require at its exposed edges?

• a.Taped with duct tape for the first year
• b.Fastened down and trimmed full length✓
• c.Left loose so the carpet can be lifted
• d.Trimmed at doorways, loose elsewhere

The standard requires exposed carpet edges to be fastened to floor surfaces and to have trim along the entire length of the exposed edge. A loose edge is a trip hazard the rule removes. Tape is not trim. Trimming only at doorways leaves other exposed edges unfinished.2010 ADA Standards §302.2; 2025 CBC §11B-302.2

Particleboard underlayment will be installed in a new California home. Which CALGreen requirement applies to it?

• a.A critical radiant flux rating
• b.Low formaldehyde emission standards✓
• c.An 80 percent CDPH emissions test
• d.A 50 g/L VOC limit

CALGreen requires hardwood plywood, particleboard and medium density fiberboard to meet low formaldehyde emission standards. The 80 percent CDPH test applies to resilient flooring. Fifty g/L is an adhesive VOC limit under SCAQMD Rule 1168. Radiant flux ratings apply to floor finishes, not to underlayment panels.2025 CALGreen §4.504.5

In the South Coast district, what VOC limit does Rule 1168 set for cove base adhesive?

• a.100 g/L
• b.60 g/L
• c.50 g/L✓
• d.250 g/L

Rule 1168's table lists cove base adhesive at 50 g/L. Sixty g/L is the rubber floor adhesive limit. One hundred appears for wood flooring adhesive in the table's first column. Two hundred fifty is a roofing and building-envelope adhesive figure.SCAQMD Rule 1168, Table 1

Under CRI 105, what indoor conditions must be held when residential carpet is installed?

• a.65–95°F with relative humidity at most 65%✓
• b.55–85°F with relative humidity at most 80%
• c.70–100°F with relative humidity at most 75%
• d.60–90°F with relative humidity at least 65%

CRI 105 calls for 65–95°F with a maximum of 65% relative humidity, held from 48 hours before to 72 hours after. 55–85°F with 80% RH is not CRI's range. 70–100°F runs above CRI's temperature range. A humidity minimum of 65% reverses the limit into a floor.CRI 105 §7.2

How far ahead of installation does Armstrong want flooring, adhesive and patch delivered to the job?

• a.At least 7 days
• b.The morning of installation
• c.At least 48 hours✓
• d.At least 24 hours

Armstrong says to deliver flooring materials, adhesives, patches and seaming products a minimum of 48 hours before installation and to condition them for at least 48 hours. Seven days is Congoleum's HVAC lead time, not a delivery rule. Twenty-four hours is too short. Same-morning delivery allows no conditioning.Armstrong F-5061 Ch. 2 (material storage and handling)

According to the federal carpeting specification's design notes, which fiber is recommended for commercial installations?

• a.Triexta (PTT)
• b.Nylon✓
• c.Cotton
• d.PET polyester

The notes describe nylon as abrasion resistant, durable and recommended for commercial installations. PET polyester is limited to light-wear areas because it rebounds poorly once crushed. Triexta is recommended for residential use. Cotton is listed among fibers that may not meet commercial performance requirements.UFGS 09 68 00, §2.1 notes

Under Cal/OSHA section 1529, removing asbestos-containing floor tile and construction mastic is which class of asbestos work?

• a.Class IV
• b.Class III
• c.Class II✓
• d.Class I

Class II covers removal of asbestos-containing material other than thermal system insulation or surfacing, expressly including floor tile, sheeting and construction mastics. Class I is removal of thermal system insulation and surfacing material. Class III is repair and maintenance where material is likely disturbed. Class IV is maintenance and custodial contact without disturbance.Cal. Code Regs., tit. 8, §1529(b)

What vacuum does section 1529 require for cleaning floors during asbestos flooring removal?

• a.A wet/dry vacuum with a foam filter
• b.A shop vacuum with a cloth filter
• c.HEPA, disposable bag, metal floor tool✓
• d.HEPA with a rotating brush head

Section 1529 requires vacuums equipped with a HEPA filter, a disposable dust bag and a metal floor tool with no brush. An ordinary shop vacuum lacks the HEPA filter. A brush head is specifically excluded. A foam-filtered wet/dry vacuum is not HEPA.Cal. Code Regs., tit. 8, §1529(g)(8)(A)

When does section 1529 allow mechanical chipping of asbestos-containing flooring?

• a.Inside a negative pressure enclosure✓
• b.When the material is wetted first
• c.Never under any circumstances
• d.When less than 100 square feet is removed

Mechanical chipping is prohibited unless performed in a negative pressure enclosure meeting the standard. Wetting alone does not permit it. The 100-square-foot figure concerns registration, not chipping. Saying never ignores the enclosure exception.Cal. Code Regs., tit. 8, §1529(g)(8)(A)

How long is a Cal/OSHA registration for asbestos-related work valid?

• a.One year after issuance✓
• b.Three years after issuance
• c.For a single job site
• d.For the life of the business

Section 341.6 says the registration is valid for one year after issuance. Three years and the life of the business overstate it. It is not limited to a single site; it is required before work at any site involving 100 square feet or more.Cal. Code Regs., tit. 8, §341.6(a)

For Cal/OSHA asbestos registration, what makes a construction material "asbestos containing"?

• a.More than 10% asbestos by weight
• b.More than 1% asbestos by weight
• c.A detectable amount of asbestos by volume
• d.More than 1/10 of 1% asbestos by weight✓

Section 341.6 defines asbestos-containing construction material as containing more than one-tenth of one percent asbestos by weight. One percent is EPA's NESHAP threshold for Category I material, a different rule. A detectable amount measured by volume is not the definition. Ten percent is far above it.Cal. Code Regs., tit. 8, §341.6(c)

Before a renovation, what does EPA's asbestos NESHAP require the owner or operator to do?

• a.Wet the flooring for 24 hours
• b.Remove the flooring, then inspect
• c.Inspect for asbestos first✓
• d.Notify neighbors within 1,000 feet

The NESHAP requires a thorough inspection of the affected facility or part of it for asbestos, including Category I and II nonfriable material, before the renovation begins. Neighbor notice is not the stated requirement. Wetting is a work practice, not the inspection duty. Removing flooring before inspecting reverses the order.40 CFR 61.145(a)

Under EPA's RRP rule, interior work that disturbs how much painted surface per room is treated as minor repair and maintenance?

• a.2 square feet or less
• b.100 square feet or less
• c.6 square feet or less✓
• d.20 square feet or less

Minor repair and maintenance covers interior work disturbing 6 square feet or less of painted surface per room, without prohibited practices. Twenty square feet is the exterior figure. One hundred square feet is an asbestos threshold. Two square feet is not the rule's number.40 CFR 745.83 (definitions)

Old non-resilient (for example, construction) adhesive remains on a floor that will receive new resilient flooring. What degree of removal does Armstrong require?

• a.Partial, if covered with felt
• b.A thin, smooth film may remain
• c.100 percent removal✓
• d.Ridges may remain if primed

Armstrong's table says adhesives other than resilient flooring adhesives are to be removed 100 percent. A thin smooth film is allowed only for certain resilient flooring adhesives under some products. Priming over ridges is not permitted. Felt covering is for tacky residue under some underlayments, not a substitute for removal.Armstrong F-5061 Ch. 3 §E-13

A slab has a true expansion joint where new resilient flooring is to go. What does Armstrong recommend?

• a.Cover it with flooring and a bead of caulk
• b.Run the flooring across and roll it twice
• c.Fill it with patch and cover it
• d.Do not run flooring across it✓

Armstrong does not recommend installing flooring across expansion or isolation joints, because they move and crack patches and flooring; joint covers are specified instead. Filling it with rigid patch defeats the joint. Caulk under flooring does not let the floor move. Extra rolling does not change the joint's movement.Armstrong F-5061 Ch. 3 §E-14

How is the surface pH of concrete tested under the ASTM F710 method Armstrong describes?

• a.A calcium chloride dish weighed after 72 hours
• b.Tap water pooled overnight, then a pH strip
• c.A pH strip pressed dry onto the slab for 5 minutes
• d.Distilled water on the slab 60 seconds, then a pH strip✓

Distilled water is placed on the slab for 60 seconds and a pH indicator strip is placed into it. A dry strip has nothing to react with. Tap water and an overnight wait are not the method; CRI also specifies distilled water. The calcium chloride dish measures moisture emission, not pH.Armstrong F-5061 Ch. 3 §E-11; ASTM F710 (named)

A surface pH reading on a concrete slab comes back below 7. What does CRI suggest this may indicate?

• a.A perfectly carbonated surface
• b.A slab too dry to accept adhesive
• c.Excess calcium hydroxide
• d.Residue remaining on the surface✓

CRI notes that pH readings below 7 may indicate a residue remaining on the concrete. Normal carbonation brings the surface to about 8.5, not below 7. pH does not measure dryness. Calcium hydroxide raises pH, so it would read high, not low.CRI 105 §6.3 note

Why does Armstrong say not to mark a concrete slab with a permanent marker or spray paint before installing vinyl?

• a.Inks raise the pH of the concrete
• b.Ink can bleed through and stain✓
• c.Inks block moisture testing
• d.Inks void the adhesive's VOC rating

Armstrong says indelible inks and spray paints on the slab or the back of the flooring can bleed through and permanently stain it. Inks do not change pH in any meaningful way. They do not block moisture tests. VOC ratings belong to the adhesive product, not to marks on the slab.Armstrong F-5061 Ch. 3 §E-14

According to Armstrong, what must be directly beneath an on-ground or below-grade concrete slab that will receive resilient flooring?

• a.A sheet of 15-pound felt paper
• b.An effective, functional vapor retarder✓
• c.Nothing, if the slab is thick enough
• d.A layer of sand at least 4 inches thick

Armstrong says on-ground and below-grade slabs must have an effective and functional vapor retarder directly beneath the concrete. A sand layer is not the stated requirement. Felt paper is used under nailed wood, not under slabs. Slab thickness does not stop ground moisture.Armstrong F-5061 Ch. 3 §E-1

What water-cement ratio range does Armstrong cite as practical and recommended for slabs that will receive resilient flooring?

• a.0.45 to 0.5✓
• b.0.6 to 0.7
• c.0.25 to 0.3
• d.0.8 to 1.0

Armstrong cites water-cement ratios of 0.45 to 0.5 as practical and recommended by the concrete industry for such slabs. Higher ratios such as 0.6 to 1.0 slow drying and cause moisture problems. A ratio of 0.25 to 0.3 is not the range Armstrong gives.Armstrong F-5061 Ch. 3 §E-1

Under the federal carpeting specification, how old must a concrete substrate be before carpet installation begins?

• a.At least 28 days
• b.At least 90 days✓
• c.At least 60 days
• d.At least 7 days

The specification says not to commence carpeting until the concrete substrate is at least 90 days old. Twenty-eight days is an epoxy topping specification's cure period. Sixty days is a laminate manufacturer's cure period. Seven days is far too short.UFGS 09 68 00 §3.3

The federal carpeting specification sets how many moisture tests in each installation area, at minimum?

• a.Three, evenly spaced✓
• b.One, at the center
• c.Two, at opposite corners
• d.Ten, along the walls

The specification calls for a minimum of three evenly spaced tests of each installation area. One test cannot represent an area. Two corner tests miss the middle and are fewer than required. Ten wall tests are not the rule and miss the field.UFGS 09 68 00 §3.2

Which panel does Armstrong warn may cause discoloration, indentation, loss of bond or delamination when used as an underlayment?

• a.Underlayment-grade poplar plywood
• b.Some lauan plywood✓
• c.Birch plywood with exterior glue
• d.APA-rated sanded plywood underlayment

Armstrong warns that some lauan may present severe problems such as discoloration, indentation, loss of bond and delamination. APA-rated underlayment grades with sanded faces are its recommended panels. Birch and poplar with fully sanded faces and exterior glue are listed as acceptable.Armstrong F-5061 Ch. 3 §D

For which installation method does Armstrong accept untempered hardboard underlayment?

• a.Fully adhered resilient products
• b.Residential felt-back perimeter bond✓
• c.Luxury vinyl tile glued with epoxy
• d.Commercial heat-welded sheet

Armstrong accepts untempered hardboard only under resilient products installed by the residential felt-back perimeter bond method. Fully adhered products, commercial welded sheet and glued LVT are not included in that acceptance.Armstrong F-5061 Ch. 3 §D-1b

Before solid wood flooring is laid, the Wood Handbook suggests heating the closed house to about how much above the outdoor temperature, and for how long?

• a.About 15°F warmer, for 3 days✓
• b.About 5°F higher, for one day
• c.About 30°F higher, for a week
• d.Exactly 70°F, for 24 hours

The Handbook says to close up the house at night and raise the temperature about 15°F above outdoor temperature for about three days before laying the floor. Five degrees for a day is too little and too short. Thirty degrees for a week is not its advice. A fixed 70°F for a day is not the stated practice.USDA Wood Handbook (FPL-GTR-282) Ch. 13, Finished Flooring

Armstrong does not recommend installing new flooring over which kind of existing floor?

• a.A single layer of well-bonded smooth vinyl
• b.Smooth sheet vinyl, with embossing leveled
• c.Existing rubber or slip-retardant flooring✓
• d.Fully adhered, stripped linoleum

Armstrong does not recommend new flooring over existing rubber or slip-retardant floors. A single, well-bonded, smooth resilient layer can be acceptable under its conditions. Stripped, adhered linoleum and leveled sheet vinyl fit those conditions when the system allows it.Armstrong F-5061 Ch. 3 §F

Which way do the pins on carpet tack strip lean?

• a.Toward the center of the room
• b.Toward the nearest doorway
• c.Straight up
• d.Toward the wall✓

CRI requires tack strip to be placed with the pins angled toward the vertical abutment, so tension pulls the carpet down onto them. Pins toward the room would let the carpet slip off. Vertical pins hold poorly under tension. Doorways get transition moldings, not strip.CRI 105 §11.1

Where does CRI 105 say tack strip should NOT be installed?

• a.Around heat registers
• b.Along exterior walls
• c.Along closet walls
• d.Across doorways✓

CRI says to avoid installing tack strip across door openings and sills; the edge there is finished with a transition. Exterior walls, register openings and closet walls are ordinary vertical abutments that receive strip.CRI 105 §11.1

How does CRI 105 say separate cushion is finished at the tack strip?

• a.Trimmed flush to the inside of the strip✓
• b.Cut 3 inches short of the strip
• c.Lapped over the strip by one inch
• d.Tucked under the strip before nailing

CRI says to trim cushion flush with the inside contour of the tack strip and fasten it with staples or nonflammable cushion adhesive. Lapping it over the strip lifts the carpet off the pins. Tucking it under the strip raises the strip. Leaving a 3-inch gap creates a soft trough at the wall.CRI 105 §11.2

How are separate cushion seams secured, other than for fiber cushion, under CRI 105?

• a.With vinyl-coated cloth cushion tape✓
• b.With construction adhesive on the subfloor
• c.With hot-melt carpet seaming tape
• d.They are left loose and butted

CRI says that, except for fiber cushions, cushion seams are secured with appropriate vinyl-coated cloth cushion tape. Hot-melt tape is for carpet seams. Construction adhesive is not the stated method. Leaving them loose lets the cushion shift and gap.CRI 105 §11.2

Which carpet seam position does CRI 105 say to avoid?

• a.Out of the path of light across it
• b.Running the length of the area
• c.Perpendicular to a doorway opening✓
• d.Parallel to the main traffic

CRI says seams should not be perpendicular to doorway openings. It recommends seams that run the length of the area, run parallel to main traffic, and are not struck across by natural light, so the other three choices describe good placement.CRI 105 §5.1

Which trimming technique does CRI 105 prefer for carpet seam edges?

• a.Cutting through tufts at an angle
• b.Tearing along the backing weave
• c.Straightedge cutting from the back
• d.Row-cutting both edges✓

CRI says row-cutting both edges is preferred, though other techniques may suit some carpets. Cutting only from the back with a straightedge can cut tufts. Tearing damages the backing. Angled cuts through tufts leave a visible line.CRI 105 §10.1

What minimum adhesive width does CRI 105 recommend on premium hot-melt seaming tape?

• a.1/2 inch
• b.6 inches
• c.2-3/4 inches✓
• d.1-1/4 inches

CRI recommends premium tape with a minimum adhesive width of 2-3/4 inches. One and a quarter inches and half an inch are narrower than the recommended minimum. Six inches is not CRI's figure.CRI 105 §10.3.1 note

Which power stretcher head does CRI 105 recommend for a loop-pile carpet?

• a.A cotton head✓
• b.A pin head
• c.A spiked roller
• d.A rubber suction cup

CRI recommends pins for cut pile and a cotton head for loop construction. A pin head is for cut pile. A spiked roller is a seam tool CRI cautions against. A suction cup is not a stretcher head in the standard.CRI 105 §11.4

In CRI's stretch diagram, what is the first step at corner A?

• a.Staple the carpet along both walls
• b.Hook about 3 feet in both directions✓
• c.Glue the corner to the subfloor
• d.Power stretch straight across the room

CRI's Step 1 is to hook onto the tack strip approximately 3 feet in both directions along corner A. Power stretching comes next, at about 15 degrees toward corner B. Stapling carpet to tack strip is prohibited. Gluing the corner is not part of a stretch-in method.CRI 105 §11.4, Figure 2