NWFA CI case studies
NWFA CI · Put your knowledge to work in context.
The NWFA Certified Inspector (CI) is one of five credentials in the National Wood Flooring Association's Certified Professional program, listed alongside Certified Sales Advisor, Certified Professional, Certified Sand & Finish, and Certified Installer. The NWFA describes the program as one that "validates your industry knowledge and expertise and recognizes you as an expert in your field," and it lists certified professionals exclusively in its Find a Professional directory - so the credential functions as a public, searchable signal of competence rather than an internal title. The NWFA CI case studies are 5 cases and about 3,488 words.
1Cupping in Solid Oak Over a Vented Crawlspace
A 2,400-square-foot, 3/4-inch by 3-1/4-inch solid red oak strip floor was nailed over 5/8-inch plywood on 2x10 joists above a vented crawlspace in October. By February the homeowner reported ridging.
787 words, about 4 min2Winter Gapping in a Floating Engineered Plank Floor
An 1,800-square-foot floor of 1/2-inch by 7-inch engineered plank was installed floating over a 2 mm foam underlayment on plywood in July, when the home was at 52% RH and 74°F. The cartons acclimated in the garage for 48 hours before installation.
721 words, about 4 min3Recoat Peeling in a Fitness Studio
A 6,000-square-foot fitness studio has a 10-year-old engineered floor with a factory aluminum-oxide finish. The maintenance crew screened it with 120-grit paper, tacked with a solvent-based deglosser, and applied two coats of water-based urethane.
680 words, about 3 min4Hollow Spots and Bounce in a Glue-Down Engineered Floor
A 5,000-square-foot glue-down floor of 5/8-inch by 5-inch engineered hickory was installed over an 8-year-old concrete slab on grade. The occupant reports hollow sounds and a soft feel near a control joint.
636 words, about 3 min5Buckling and Compression Ridges in a Gymnasium Maple Floor
A 4,000-square-foot gymnasium floor of 25/32-inch by 2-1/4-inch solid maple was installed over a sleeper system in June. The building was not yet conditioned; indoor RH was about 75% and the flooring moisture content at installation was 11%.
664 words, about 3 min