National Floor Covering Association (NFCA) is proud to partner with Interior Designers of Canada (IDC) to promote floor covering specifications, quality assurance and education in the construction industry. www.idcanada.org
Consult experts (NFCA members) and choose carefully when considering safety flooring. The slip resistance or coefficient of friction (COF) of flooring is dependent not only on the design of the flooring (surface texture / pattern, density of embedded rough particles, etc.) but may also vary considerably due to the presence of contaminants, water, floor finishes, and other factors not under the control of the designer, flooring contractor or builder, including improper cleaning and maintenance and even inappropriate foot wear. 'Slip-proof' and 'non-slip flooring' are terms that must not be used, as no flooring is entirely slip resistant. Source: NFCA Floor Covering Reference Manual. Find an NFCA manufacturer who specializes in such products in your Province at www.nfca.ca
The NFCA Quality Assurance Program (QAP) is a specifiable, commercial floor inspection service that helps construction teams ensure important site conditions exist before installation proceeds. Independent inspectors give a voice to the spec on site and support by answering questions, recording site metrics, reviewing testing requirements and issuing unbiased reports that are delivered simultaneously to all parties involved in the build. The goal is to have the flooring installed according to manufacturers installation guidelines, leave the client with a quality product (and warranty), avoid delays and reduce claims. QAP is aimed at larger commercial projects where the stakes are high and deadlines often supersede quality. In such cases, QAP allows the entire construction team to understand the risks and to make choices together from a position of trust. The alternative... push the sub-trade to take the risk, install early and leave the building owner with flooring issues and ongoing repairs. No good for anyone's brand.
Sample size matters! Hardwood floors sell mostly because of their visual appeal. Color variation, grade, grain, knots and other natural characteristics can all enhance the look of a wood floor or be cause for rejection by the client. Therefore, setting expectations through representative sampling is important and requires showing more than just a single small piece of the desired product when making a sale. Under sampling raises the likelihood of a dispute on site at time of delivery, or worse after the floor is installed. Home owners should sign off on sample acceptance, and agreed to samples should be digitally recorded for future reference. Showroom samples that are not reasonably representative of a product should be replaced.
Dull surfaces such as new concrete disguise sub-floor surface imperfections. Shiny, reflective surfaces such as new vinyl or rubber flooring do the opposite.
According to National Floor Covering Association (NFCA) specifications, the minimum industry standard for sub-floor flatness (surface waviness) when installing resilient flooring is 3/16" over 10' for slab on grade and 1/8" over 10' for suspended slabs.
These images show an example of what finished flooring can look like when installation proceeds over a sub-floor surface that doesn't meet tolerance, in this case, 1/2" over 4' (using a 10' straight edge).
Construction budgets should include an allowance for effective grinding and patching work (not in the scope of work for the flooring contractor according to industry standards). Specifications should clearly direct responsibility for this work to the owner of the slab and/or construction manager, and conversation around expectations and scheduling for such work should be had well in advance of floor installation start date.
NFCA's third party independent inspection service, the 'Quality Assurance Program' (QAP), draws attention to such issues giving busy construction teams the chance to understand, plan and solve issues fairly and in advance of the all important deadline. The alternative is the same old same old disputes over extras, delays, poor quality, hold backs and dissatisfied clients.
Concrete Sub-Floor Preparation: Minor discrepancies in new or existing surfaces can be adjusted by using patching compounds. This is considered, within reason, part of the flooring contractor's work. Where flatness (surface waviness) discrepancies do not meet NFCA or floor manufacturers' tolerances (3/16” over 10’ using the straight edge test method), conditions must be corrected using a Hydraulic Cement Underlayment (HCU), the application of which shall be done by others (general contractor or owner) This may also be undertaken by the flooring contractor as a billable extra. Moisture testing of the parent concrete slab, using the preferred RH In-Situ Probe test method in accordance with ASTM F-2170, must take place prior to application. A surface temperature of more than 10c (50f ), or per manufacturers’ installation guidelines, must also be confirmed before proceeding.
To find NFCA members specializing in the supply of Hydraulic Cement Underlayment click here.