| NAF | Term for composite fiber board product where the resign system used to combine fibers into a panel product contains NO Formadehyde. |
| NASFM | Founded in 1956, NASFM is a not-for-profit trade association dedicated to raising the professional, ethical and educational standards of the store fixture manufacturing industry, and to promoting the value of members' products and services to their customers. |
| Native (plant) Species | Native species are well adapted to local climatic conditions and can flourish with little to no maintenance or watering. Native species are common to wild areas of the same climate, though the term is sometimes used to include other very well adapted species. |
| Naturescaping | Naturescaping features native plants, natural landscapes, and water-friendly gardening practices. It reduces water usage, can eliminate use of harmful chemicals, attracts beneficial/interesting wildlife, and requires very little maintenance. |
| NAUF | Means "No Added Urea Formaldehyde", at time s this is also called "NUFA" meaning, "No Urea Formaldehyde Added". Relates to LEED EQ4.4 whcih requirement states," Wood products used shall contain no added urea-formaldehyde. See EQ4.4 for full description of point. |
| Naval Stores | A term applied to the oils, resins, tars, and pitches derived from oleoresin contained in, exuded by, or extracted from trees, chiefly species of pines (genus Pinus). Historically, these were important items in the stores of wood sailing vessels. |
| NBMDA | North American Building Material Distribution Assn. Members are distributors and manufacturers of a wide variety of building materials and related specialty products. The organization provides education, training, statistical research and networking opportunities for members. |
| NFA | Means, "No Formaldehyde Added" of any type. This term is different than NUFA or NAUF. Both of these refer to as No Added "Urea-Formaldehyde". |
| No Added Formaldehyde | Term for composite fiber board product where the resign system used to combine fibers into a panel product contains NO Formadehyde. |
| No-added formaldehyde based resins | From CARB: means resins formulated with no added formaldehyde as part of the resin cross linking structure for making hardwood plywood, particleboard, or medium density fiberboard. “No-added formaldehyde based resins” include, but are not limited to, resins made from soy, polyvinyl acetate, or methylene diisocyanate. |
| Nominal-Size Lumber | (See Lumber for Dimension) |
| Nonpolar | (See Polar) |
| Nonpressure Process | Any process of treating wood with a preservative or fire retardant where pressure is not applied. Some examples are surface applications by brushing or brief dipping, soaking in preservative oils, or steeping in solutions of waterborne preservatives; diffusion processes with waterborne preservatives; and vacuum treatments. |
| NUFA | Means "No Urea Formaldehyde Added", this is also at times called NAUF "No Added Urea Formaldhyde" |